Continuity Tester Polarity Verification Techniques

Polarity problems exist in both copper and fiber-optic networks. The feedback received over the years from many technicans servicing both types of networking is that fiber-optic networks experience polarity problems more often than copper networks. Polarity problems in a fiber optic network are not the result of a dirty connector, broken optical fiber, or a macrobend, they are the result of improper labeling and or human error.

A continutiy tester is the best tool to assist in polarity verfication because it emits visible eye-safe light. Depending on the complexity of the network, verifying the polarity of a channel may be time consuming. It is a good idea to bring a note book and record your observations as you work your way from one end of the chanel to the other.

ANSI/TIA-568-C defines two polarity schemes for duplex Fiber Optic Patch Cable: A-to-A and A-to-B. The most commonly deployed scheme is A-to-B, therefore this section focuses on that scheme. Because there are many different network configurations, we will only describe polarity verfication techniques for the configuration shown in Figure 17.28.

Each end of a duplex patch cord should identify position A and position B. This is typically accomplished with raised lettering on the latch that holds together the two connectors at each end of the patch cord. A raised letter latch holding together two SC connectors is shown in Figure 17.29. Because of the physical size on an SC connector, the raised lettering is easy to read. However, this is not the case with small form factor connectors such as the latched LC pair shown in Figure 17.30.

The first step in verifying the polarity the channels shown in Figure 17.28 is to de-energize the equipment at both ends of the network. Since latched duplex patch cords are used, unplug both connectors from both ends of the patch cords at each end of the network. Using the continuity tester, verify that connectors on each end of a patch cord are oriented so position A goes to position B. You can do so by inserting the ferrule of the A position connector into the continuity tester as shown in Figure 17.31.

With the connector inserted, energize the continuity tester and check to see if light is exiting the optical fiber in position B at the opposite end of the patch cord. If light is exiting the optical fiber in position B, the polarity is correct. If light is exiting the optical fiber in position A, the polarity is not correct. With the continuity tester still attached and energized, unlatch both connectors, swap locations, and relatch. Verify light is exiting from the optical fiber in position B. Repeat this test for the other patch cord and correct as necessary.

With both patch cords properly configured, the next step is verify the polarity of the horizontal cabling. To minimize access to other horizontal cabling, you should work from the equipment outlet to the patch panel. Remove the cover of the equipment outlet and plug both connectors at one end of the patch cord into the receptacles on the equipment outlet. Do not disturb the horizontal cabling connections.

Insert the ferrule of the A position connector at the end of the patch cord into the continuity tester as shown earlier in Figure 17.31. With the connector inserted, energize the continuity tester and check to see if light is exiting the horizontal cabling optical fiber in position B at the patch panel. If ligth is exiting the optical fiber in position B, the polarity is correct. If light is exiting the optical fiber in position A, the polarity is not correct. With the continuity tester still attached and energized, unlatch both horizontal cabling connectors at the back of the equipment outlet, swap locations, and relatch. Light should be exiting from the optical fiber in positon B. Reinstall the equipment outlet cover.

Fiberstore Solutions ensures its range of fiber patch cords are manufactured to the industry’s highest standards for network cabling using the highest quality optical fiber, sheathing and connectors available. All of our ST to ST, SC to SC and LC to LC multi-mode fiber patch cables deliver high-capacity, high-data-rate transfer and are optimized for dense wavelength division multiplexing (DWDM) and optical networking technology. Now LC fiber optic cable is in huge stock, buy now same day shipping to your country.

Common Types Of Fiber Optic Patch Cord

A patch cord (sometimes called a patch cable) is a length of cable with connectors on the ends that is used to connect an end device to something else, such as a power source. One of the most common uses is connecting a laptop, desktop or other end device to a wall outlet.

Generally, fiber optic patch cable consists of two parts: the fiber optic cable and the fiber optic connectors. fiber optic patch cables are named by the cables and the connectors together, for example, a LC to SC 3 meters single mode simplex APC types Fiber Optic Patch Cord, here the name LC and SC stand for the name of specified fiber optic connector, 3 meters is the whole cable length, single mode refer to the cable type, simplex means this cable is with one single core, APC is the polish type of the fiber optic connectors. fiber optic patch cables are important components used in the fiber optic communications network.

Fiber optic patch cables may be split into different types according to fiber cable mode, cable structure, connector types, connector polishing types and cable sizes. However nowadays we would like to introduce the normal kinds of fiber patch cable based on fiber connectors.

Most Common Forms of Fiber Patch Cables include:

SC Fiber Optic Patch Cord

SC fiber optic patch cable is one of the earliest type and something of the very most commonly used fiber optic cable, it is simple to use and value saving, SC fiber cable is widely used in fiber optic networks. SC fiber patch cable is by using zirconia sleeve and plastic housing. Oahu is the standard fiber optic cable assemblies, with simplex, duplex patch cords and standard pigtails. Fiberstore offer you different types of SC fiber patch cord, such as SC to SC fiber cable, single mode fiber SC to LC, ect.

The SC fiber optic patch cord was invented by the Japanese company NTT. It really is probably the most popular fiber optic patch cords. SC fiber optic patch cord features low priced, simplicity along with good durability, SC fiber optic patch cords is with a locking tab about the cable termination; it’s a push and pull type fiber optic connector.

ST Fiber Optic Patch Cord

ST fiber cable connector features bayonet-style housing along with a long spring-loaded ferrule support the fiber. They are available in multi-mode or single mode versions. Horizontally mounted simplex and duplex adapters are available with plastic or metal housing. It is the standard fiber optic cable assemblies, with simplex, duplex patch cords and standard pigtails.

ST fiber optic patch cords standard was created by AT&T. this sort of cable is with straight tip type terminations. There is only simplex ST fiber optic patch cord with no duplex ones. These days ST fiber optic connectors are generally having a metal housing ,nevertheless, there are plastic housing ST fiber connectors, more and more people often use metal housing ST. ST APC fiber optic patch cord are also available.

LC Fiber Optic Patch Cord

The LC fiber optic cable is by using a small form factor connector and is perfect for high density applications.LC fiber optic patch cord connector includes a zirconia ceramic ferrule measuring 1.25mm O.D. having a PC or APC endface, and provides optimum insertion and return loss. It is the standard fiber optic cable assemblies, with simplex, duplex patch cords and standard pigtails.

LC will be the short kind of Lucent Connector. LC fiber patch cord connector can be a push and latch structure, with plastic housing and accurate 1.25mm ceramic ferrule. LC type is a well-liked type of small form fiber optic patch cord which decreases the space and it’s also popular for densely installation.

FC Fiber Optic Patch Cord

FC fiber optic patch cords are with FC fiber optic connectors, the industry screw type connection. FC fiber optic patch cords were quite definitely popular previously, but people have a tendency to use LC and SC to switch FC more and more. It’s the standard fiber optic cable assemblies, with simplex, duplex patch cords and standard pigtails.

The FC fiber optic patch cable comes in both single mode and multimode versions, and it is fully intermateable with NTT-FC products. Both SMF and MMF versions FC fiber optic patch cord have a zirconia ceramic ferrule with pre-polished PC profile and convex spherical end.

MTRJ Fiber Optic Patch Cord

MTRJ fiber optic patch cables feature the plastic ferrule and duplex design. MTRJ fiber optic patch cables are female connector type and male connector types, the MTRJ is a born duplex connector that utilize precision molded MT ferrules pioneered by NTT, together with precision metal guide pins and precise housing dimensions to ensure fiber alignment when mating. MT-RJ fiber optic patch cords is reliable and simple to terminate.

To facilitate installation of our active fiber equipment we support a large selection of fiber optic patch cords. The always in stock fiber cables include optical connectors such as: SC, ST, LC and FC type, simplex and duplex. Our patch cords range from 0.5m to 10m and have almost all available combination of optical connectors. The most available lengths are 1m, 2m, 3m, 5m, and 10m patch cords. All single-mode patch cords are UPC polished (Ultra Physical Contact), while the multi-mode cables are PC polished. All patch cords are manually tested and verified and each patch cable is individually sealed and labeled with measured optical performance.

Fiber Patch Cord Reliability

Fiber optic patch cords are one of the simplest elements in any optical network, consisting of a piece of fiber optic cable with a connector on each end. Despite its simplicity, the patch cord can have a strong effect on the overall performance of the network. The majority of problems in any network occur at the physical layer and many are related to the Fiber Optic Patch Cord quality, reliability, and performance. Therefore, using patch cords that are more reliable helps reduce the chance of costly network downtime.

Network designers would prefer components with a history of proven long-term performance. However, since optical networking is a relatively new technology, there is no significant long-term data for many components. Therefore, designers must rely upon testing from the component manufacturer or supplier that can simulate this history and assure the quality and reliability over the life of the network. This paper discusses the importance of quality, reliability, and performance as they relate to industry standards and manufacturing practices. The performance of the patch cord is also studied using a “perfect patch cord” and polishing observations as tools to understand patch cord principles.

Patch cord reliability is guaranteed not only by using quality components and manufacturing processes and equipment, but also by adherence to a successful Quality Assurance program 4). While patch cords themselves are typically tested 100% for insertion loss and return loss, if applicable, there are many other factors that need to be monitored to insure the quality of the patch cord.

One of the most important factors is the epoxy. Epoxies typically have a limited shelf life and working life, or “pot life.” This information is readily available from the manufacturer. It is absolutely necessary that both of these criteria be verified and maintained during manufacture. Epoxy beyond its expiration date needs to be discarded. Chemical changes affecting the cured properties of the epoxy can occur after this date. This date can also be dependent on storage conditions, which need to be observed.

Most epoxies used in fiber optic terminations are two-part epoxies and, while they cure at elevated temperatures, preliminary cross-linking will begin upon mixing. Once this has started, the viscosity of the epoxy can begin to change, making application more difficult over time. The epoxy can become too thick to fill the ferrule properly and too viscous to enable a fiber to penetrate, causing fiber breakage.

Mixing two-part epoxies introduces trapped air, or “bubbles”, which is injected into the connector. This trapped air introduces inconsistency in the cured epoxy, leading to a high risk of mechanical failure. The trapped air, or bubble count, must be minimized.

Many of the tooling used in patch cord assembly also has periodic maintenance and a limited tool life. This includes all stripping, cleaving and crimping tools. Most stripping tools, whether they are hand tools or automated machines, can be damaged by the components of the cable, most notably the aramid yarn strength members. Buffer strippers will dull with prolonged usage, increasing the likelihood that they will not cleanly cut the buffer. This can lead to overstressing the fiber when the buffer is pulled off. When a cleaving tool wears out and a clean score is not made, it is almost impossible to detect during manufacturing. However, the result could be non uniform fiber breakage during the cleave, which can result in either breaking or cracking the fiber below the ferrule endface. In this instance, the connector will have to be scrapped. Even crimp tools require periodic maintenance to insure the proper forces and dimensions are consistent. Crimp dies also have a tendency to accrue epoxy build-up, which can affect the crimping dimensions and potentially damage the connector.

The integrity of the incoming materials and manufacturing processes, once specified, needs to be adhered to all the appropriate guidelines and procedures. The importance of these materials not only has a strong influence on product reliability, but also on product performance.

Fiberstore manufactures and stocks fiber optic patch cables. Our stock cables feature FC/PC, FC/APC, and SMA connectors, and use single mode (SM),or multimode (MM) fiber.For example, LC to LC fiber patch cable, multimode fiber patch cables, single mode fiber SC to LC. We offer ar-coated cables for fiber-to-free space use, lightweight cables for optogenetics, high-power cables, and many other specialty fiber patch cables from stock. We also offer multimode fiber bundles, as well as custom patch cables with 24 hour turnaround on many orders. If you do not see a stock cable that is suitable for your application, please contact us. Our extensive experience with fiber patch cables enables us to offer a custom patch cable service that can ship on the same day, without a minimum order quantity.

Network Fiber Connectors

An optical fiber connector terminates the end of an optical fiber. A variety of optical fiber connectors are available. The main differences among the types of connectors are dimensions and methods of mechanical coupling. Generally, organizations standardize on one kind of connector, depending on the equipment that they commonly use, or they standardize per type of fiber (one for MMF, one for SMF). Taking into account all the generations of connectors, about 70 connector types are in use today.

As shown Figure 4-12, the most popular network fiber-optic connectors inclued

● Straight-tip (ST): An older bayonet style connector widely used with multimode fiber, as well as single-mode.
● Subscriber connector (SC): Sometimes referred to as square connector or standard connector. It is a widely adopted LAN and WAN connector that uses a push-pull mechanism to ensure positve insertion. This connector type is used with multimode and single-mode fiber.
● Lucent connector (LC): Sometimes called a little or local connector, it is quickly growing in popularity because of its smaller size. It is used with single-mode fiber and also supports multimode fiber.

Because light typically only travels in one direction over optical fiber, two fibers are usually required to support full-duplex operation. Therefore, fiber-optic patch cables bundle together two optical fiber cables and terminate them with a pair of standard single fiber connectors. Some fiber connectors accept both the transmitting and receiving fibers in a single connector known as a duplex connector, also shown in Figure 4-12.

Fiber Optic Patch Cables are required for interconnecting infrastructure devices. Some of the common patch cords are

● SC-SC multimode patch cord
● LC-LC single-mode patch cord
● ST-LC multimode patch cord
● SC-ST single-mode patch cord

LC LC fiber optic cable from Fiberstore

LC LC fiber optic cable

● LC-LC Connectors
● Multimode Duplex fiber optic cable
● Micron: 62.5/125um
● Complete with Lucent Technologies aqua jacket
● Bandwidth transmitting rates up to 10 gigabits
● All of our fiber optic patch cables feature the high degree connectors
● Fiber class: OM1
● Color: Orange

Fiber cables should be protected with a small plastic cap when not in use.

The color of the fiber jacket is often used to distinguish between single-mode and multimode patch cords. This is because of the TIA-598 standard, which recommends the use of yellow jacket for single-mdoe fiber cables and orange (or aqua) for multimode fiber cables.

Fiberstore provide various types of fiber patch cords including single mode, multimode, multi core, and armored versions. You can aslo find fiber optic pigtails and other special patch cables here. For most of them, the SC, ST, FC, LC, MU, MTRJ, E2000, APC/UPC connectors are all available, even we supply MPO/MTP fiber cables.

Some knowledge about Fiber Optic Patch Cords


In the context of optogenetics experiments with the rotary joint, a fiber optic patch cord is needed to connect the light source and the rotary joint and yet another patch cord to connect the rotary joint and the fiber-optic cannula.

Structure of a patch cord

The core and the cladding are two layers that make up the lightguide. However, the light travels inside the core of the fiber-optic, barely or not inside the cladding. For this reason, interconnected fiber-optics should have the same core diameter. Different cladding diameters have no influence on the coupling efficiency.

The buffer is a protective layer that tightly encircles the cladding. For patch cords, we usually recommend the use of another protective layer, called jacket, which is a loose tube covering the previously mentioned layers of the cable.

For a better fiber protection, we also offer larger jackets made of PVC tubing. In this case, we use the following color convention, or we can use the black jacket if preferred. Metal jackets or jackets made of other materials are also available on request.

Mono fiber-optic patch cords

The simplest form of the patch cord is a piece of fiber with buffer coating and two ferrules on its ends. So far, the msot popular fiber in optogenetics research is a fiber with a 200 um core diameter and NA=0.22.

Note 1: The fiber diameter and its numerical aperture (collection angle) limit the coupling efficiency into the fiber. Therefore, for higher coupling from sources like LEDs into an optical fiber of a specific diameter, please select a higher NA fiber an follow it all the way through to the fiber optics cannula.

Note 2: The zirconia ferrules are prefferred for being less expensive, of tighter tolerance, harder, mass produced etc. However, due to the fluorescence of the zirconia ferrules they are not recommended for applications involving fluorescence measurements.

Dual fiber-optic patch cords

A dual fiber optic patch cord has two fiber-optic strands within the jacket, where the fiber ends are inserted into the mono or dual fiber ferrules or connectors.

Some dual fiber patch cords were especially designed to easily bring the light from the two optical channels of the 1×2 rotary joint into a dual fiber cannula.

There are several types of dual fiber patch cords, depending on the type of connectors and cannulas used.

Branching fiber-optic patch cords

A branching fiber patch cord consists of multiple single fiber patch cords that are at one end joined within one connector and its ferrule, while the loose side of the patch cords ends with mono fiber ferrules or connectors.

We offer fiber-optic patch cords that branch from one input to N output connectors. These patch cords have a single FC or SMA connector on bundled fibers end, and an FC,SMA, M3, zirconia or metal ferrule for each fiber on the other end. If the source is an LED or a lamp, the optical power entering the fiber bundle is divided between the channels. In the case of a laser, please refer to the Mini Cube section. Now following we recommend you some type patch cords from our store, there are LC to LC fiber patch cable, SC to SC Fiber Optic Patch Cable.

LC-LC fiber optic patch cables are used to send high-speed data transmissions throughout your network. LC/LC fiber optic cables connect two components with fiber optic connectors. A light signal is transmitted so there is no outside electrical interference.

SC-SC fiber patch cords are primarily used in high bandwidth networks where you must send large amounts of data at high speeds. Use a SC to SC fiber jumper cable to connect two devices with SC connections. Since the data is sent via a light signal, there is no electrical interference. All of our SC fiber cables have been factory tested to ensure proper performance.

Our Fiber Optic catalogue is designed to provide you with everything you need to set up your fiber optic network, from cables to connectors to patch panels and termination boxes. Our fiber optic cables are available with combinations of LC, SC, ST, FC, and MTRJ connectors and come in 1, 2, 3, 5, and 10 meter lengths (and OM3 cables up to 30 meters). And if these parameters do not meet your fiber needs, take a look at our fiber cable Custom Calculator and create yourself a custom cable. If you have even further specific needs beyond our calculators, please call our resident fiber specialist for a fast and personalized quote on any cable or fiber accessory you require.


Some Basic Types of Fiber Optic Connector

A variety of fiber optic connectors are used, depending on the cable type and the Ethernet media system. The most commonly used fiber optic connectors as of this writing are the SC and LC connectors. You will aslo find ST connectors used on some older Ethernet equipment, and in older fiber optic cabling systems.

SC Connector

The SC connector is used on a variety of Ethernet transceivers. When higher density is needed to allow more ports within a given space, then the more compact LC connector is a popular choice. The Ethernet systems that operate at 40 and 100 Gb/s require multiple strands of fiber for their short reach media segments. The multiple strand fiber cables, also known as “ribbon trunks,” are terminated in multifiber push-on(MPO) connectors. An MPO connector can provide 12 or 24 fibers, depending on whether you are connecting to a 40 or 100 Gb/s short reach Ethernet inferface. The fiber optic patch cable with SC connector, we often see in the market, it is multimode SC fiber cable. The SC fiber optic cable is used to send multiple light signals at a time throughout gigabit networks. They are usually used in shorter cable runs, and have inner core diameter of 62.5 micron. The 62.5um cables support distances to 275 meters.

ST Connector

The ST (straight tip) connector, was developed by AT&T as a variation on a design used with copper coaxial cables. This connector has a metal connector cap that must be twisted to lock into place. The ST is considered a legacy connector, as it has been around for quite some time and can still be found in mandy installations today.

LC Connector

LC Connectors was developed by Lucent, hence the name (“Lucent connector”). An LC connector uses a retaining tab mechanism, similar to an RJ45 connector, while the connector body has a square shape similar to the SC connector but smaller in size. LC connectors are usually held together in a duplex configuration with a plastic clip. The ferrule of an LC connector is 1.25 mm.

The LC connector provides two fiber optic connections in smaller space. Because the LC connector takes up about half the space required by an SC connector, this allows vendors to provide more ports on a switch front panel or chassis module. Here we can introduce you the LC/LC fiber optic patch cables in applications, 10G LC to LC fiber cable provides 10 gigabit data transfer speeds in high bandwidth applications 5 times faster than standard 50um fiber cable. Works with both VCSEL laser and LED sources. LC/LC fiber optic cables connect two components with fiber optic connectors. A light signal is transmitted so there is no outside electrical interference.

MPO Connectors

As its name implies, the multifiber push-on (MPO) connector provides multiple fibers in a connctor that is both “push to connect” and “push to disconnect.” This connector is defined by IEC-61754-7, “Fiber optic interconnecting devices and passive components,” and TIA-604-5-D, “Fiber Optic Connector Intermateability Standard, Type MPO”. Both standards specify 12 and 24 fiber versions of the MPO connector.

You will also see the term MTP used for this connector type, which is a registered trademark of US Conec for a connector that is compliant with the MPO standards (meaning that the MTP connector is MPO connector). However, the MTP connector has been enhanced by US Conec to provide several product features, including the aility to change gender or to repolish in the field, a floating ferrule for improved optical performance, and elliptical guide pins to provide for tighter tlerance in alignment. Some of these features are covered under patents.

High quality fiber optic patch cable and assemblies are essential for any high performance optical technologies. Fiberstore ensures its range of fiber optic cables and assemblies are manufactured to the industry’s highest standards for network cabling using the highest quality optical fiber, sheathing and connectors available. Available in 62.5/125, 50/125 and 9/125 fiber types and color coded for convenience. Built to meet the needs of even the most demanding data communications, voice, and video networks, all of our ST to ST, SC to SC and LC to LC fiber optic patch cables are individually tested to ensure reliable performance.

The Advantages and Disadvantages of Multimode Fiber and Single Mode Fiber Cable

Recently, fiber optic cable becomes more popular in telecommunication because of its great bandwidth, fast speed, long distance transmission and low cost. Single mode fiber and multimode fiber optic cables are important in many networks to transmit optical signals. Though they have the same working principle and functions, each of them has their own advantages and disadvantages.

Multimode and Single Mode Fiber Cable Overview

People who have work experiences with optical networks may be familiar with fiber optic cables. And they may know the basic structure and differences between multimode and single mode fiber optic cable. Here is a simple table showing the basic knowledge of them.

single mode fiber and multimode fiber cable

From the table we can see, multimode fiber cable has a larger core diameter. And it has multiple transmission modes, but they are only suitable for short distance connections. While single mode fiber has a small core diameter, through which only one mode will propagate typically 1310 or 1550nm. Because of that, these cables are often deployed in long distance transmission due to its less dispersion. Following is a direct-viewing picture shows the diameter differences between single mode fiber and multimode fiber cables.

single mode fiber cable vs multimode optical fiber

Advantages and Disadvantages of Single Mode fiber Cable

As has mentioned above, single mode fiber optic cable is more suitable for long runs applications when compared with multimode fiber cable. Except for this, single mode fiber cable also has other three advantages.

  • Increase bandwidth capacity.
  • Limited Data Dispersion & External Interference. The single input mode allows SMF to limit light scattering, which in turn reduce light waste and increase data transmission data.
  • Fast Transmission Speed. Single mode fiber cable can support data transmission speed up to 10Gbps.

Each coin has two sides. Single mode fiber cable also has disadvantages. The most one is the cost. Although it has better performance in long runs transmission than multimode fiber cable, single mode fiber cables often cost more.

Advantages and Disadvantages of Multimode fiber Optic Cable

With a larger fiber core and good alignment tolerances, multimode fiber cable and components are less expensive and are easier to work with other optical components like fiber connector and fiber adapter, when compared with single mode fiber cable. In addition, multimode fiber cable also provides high speed and high bandwidth over short distances. And they allows several mode optical signals transmitted at the same time.

However, multimode fiber cable has high dispersion and attenuation rate, the quality of optical signals is reduced as the transmission distance is getting longer. Therefore, multimode fiber cable is often used in data and audio/video applications in LANs.

Owning to their own characteristics, single-mode fiber cable and multimode fiber cable have different application areas. Based on the transmission distance and deployment budget, if the transmission distance is less than 10 miles, the multimode fiber cable is better, for it needs less expensive optical transceiver and other components. And if the distance is over 10 miles, single mode fiber will be needed.

Related Article: Single Mode vs Multimode Fiber: What’s the Difference?

Single mode and Multimode Fiber Optic Patch Cord

Fiber Optic Patch Cable is also known as optical fiber jumper or optical patch cord. It is composed of a fiber optic cable terminated with different connectors on the ends. There are two major application areas of fiber optic patch cords which are computer work station to outlet and fiber optic patch panels or optical cross connect distribution center. Single mode fiber patch cables are primarily used for applications involving long distance, while multimode patch cables are the choice for most common local fiber systems because the devices for multimode are far cheaper.

Single mode fiber patch cables have a small core and only one pathway of light. With only a single wavelength of light passing through its core, single mode realigns the light toward the center of the core instead of simply bouncing it off the edge of the core as with multimode. Single more is typically used in long-haul network connections spread out over extended areas-longer than a few miles. For example, telcos use it for connections between switching offices. Single mode cable features a 9-micron glass core.

Multimode fiber patch cords have a large-diameter core that is much larger than the wavelength of light transmitted, and therefore has multiple pathways of light-several wavelengths of light are used in the fiber core. Multimode fiber patch cord can be used for most general fiber applications. Use multimode fiber for bringing fiber to the desktop, for adding segments to your existing network, or in smaller applications such as alarm systems. Multimode cable comes with two different core sizes: 50 micron or 62.5 micron.

Simplex fiber patch cable consists of a single fiber, and is used in applications that only require one-way data transfer. For instance, an interstate trucking scale that sends the weight of the truck to a monitoring station or an oil line monitor that sends data about oil flow to a central location. Simplex fiber is available in single mode and multimode.

Duplex fiber optic patch cord cable consists of two fibers, usually in a zip cord (side-by-side) style. Use duplex multimode or single mode fiber optic cable for applications that require simultaneous, bi-directional data transfer. Workstations, fiber switches and servers, fiber modems, and similar hardware require duplex cable. Duplex fiber is available in single mode and multimode.

Applications of optical patch cord:

FTTH application
Premise installations
Data processing networks
Wide Area Networks (WANs)
Telecommunication networks
Industrial, mechanical and military


. Fiber optic connector type: LC, FC, SC, ST, MU, MTRJ, E2000
. Ferrule Interface type: PC, UPC, APC
. Fiber cores: Simplex, duplex, 4 fibers, 8 fibers etc.
. Fiber type; Single mode (G.652, G655), multimode(50/125)/(62.5/125)
. 100% Insertion Return Loss, End Face and Interference inspection
. Low insertion loss, high return loss
. Excellent mechanical endurance
. Good in repeatability and exchangeability
. Insertion loss: <0.5 dB
. Operation temperature: -20° to 85°C
. 10G OM3 OM4 fiber cable available
. Various jacket material, PVC and LSZH

FiberStore fiber jumpers are manufactured strictly according to international standard. We adopt high quality raw materials and we use on-site manufacturing equipment. Our skilled workers and quality control department work closely together to guarantee that every piece of our fiber optic patch cord is excellent quality and looking. Our fiber patch cables are fully compliant with international standards and are with very good quality and competitive prices.

Some Other Fiber Optic Patch Cord

Armored fiber patch cords

Armored fiber patch cords (armored multi fiber cable) retain all the features of standard optical patch cord, but they are much stronger. The armored fiber patch cords will not get damage even it is stepped by an adult, and they are anti-rodents, when use such armored fiber patch cord, people do not need to worry that the rodent animals like the rats may bite the cables and make them broken. Although armored fiber cables are strong, they are actually as flexible as standard fiber optic patch cord; they can be bended randomly without being broken.

Armored fiber patch cord can be made similar outer diameter with the standard fiber patch cords, this make them space saving. What is more, they can be with different jacket colors and jacket types such as OFNR etc. and the armored fiber patch cords are actually light weight, the armored fiber patch cords can be with SC, ST, FC, LC, MU, SC/APC, ST/APC, FC/APC, LC/APC etc types of terminations.

The armored fiber optic patch cord has features as common type fiber optic patch cables but more robust designed to deploy in FTTH projects inside the buildings. The armored fiber optic patch cord use stainless steel armor inside the jacket to make the fiber patch cord resistant of high tension and pressure. It can resist the weight of an adult person and it is not easy to break when is bent or dragged. The armored fiber optic patch cord is flexible with high damage resistant by improper twist and also resistance of pressure and rodent bites.

MPO Fiber Patch Cord

MPO patch cord (Ribbon fan out Fiber patchcord, Ribbon mliti cable fan out) use MTP and MPO multi fiber type connectors, each one of the connector are used with ribbon type fiber optic cables which contain multi fiber in one single jacket, so that MPO Fiber Patch Cord greatly save space and are very convenient to use. Based on single ferrule MT technology, the MPO Fiber Patch Cord assemblies provide up to 72 fiber connections in a single point, reducing the physical space and labor requirement, while providing the same bandwidth capacity of a multi-fiber cable with individual fiber connector terminations per cable( know more about MTP MPO cable).

Bundle fan out patch cord 

Bundle fan out patch cord (Multi cable fan out) are enormously valuable in speeding up the installation process, by eliminating the need for unnecessary splicing or terminations in the field.

Bundle fan out patch cord assemblies can be with various structures and connectors options. Bundle fan out patch cord assemblies are available in various fiber counts, with distribution cable or outside plant cable. Outside plant cable assemblies utilize end-blocking kits for water protection and fan out tubing for fiber ruggedizing, Distribution is 900un tight buffered and typically not ruggedized, depending on the application. While Bundle fan out patch cord assemblies are most often pigtail, optical fiber jumpers are also available and provide numerous installation advantages.

Bundle fan out patch cord assemblies are a custom design product; cable length, jacket types and connectors are with many options. To easily identify the multiple fiber cables, 0.9mm cable itself are made with different colors, if 2mm or 3mm cable it will be put number label to identify. Pulling eyes are also available with the cable; pulling eye is small devices, which can be fastened to the cable and easily, pull it through duct or small space place. Long fiber optic cable assemblies are usually packed by plastic or wooden reels to protect it from damage.

Fiber Optic Patch Cord Wiki

optical patch cord is a fiber optic cable capped at either end with connectors that allow it to be rapidly and conveniently connected to CATV, an optical switch or other telecommunication equipment. Its thick layer of protection is used to connect the optical transmitter, receiver, and the terminal box. This is known as “interconnect-style cabling”.


. Fiber optic connector type: LC, FC, SC, ST, MU, MTRJ, E2000
. Ferrule Interface type: PC, UPC, APC
. Fiber cores: Simplex, duplex, 4 fibers, 8 fibers etc.
. Fiber type; Single mode (G.652, G655), multimode(50/125)/(62.5/125)
. 100% Insertion Return Loss, End Face and Interference inspection
. Low insertion loss, high return loss
. Excellent mechanical endurance
. Good in repeatability and exchangeability
. Insertion loss: <0.5 dB
. Operation temperature: -20° to 85°C
. 10G OM3 OM4 fiber cable available
. Various jacket material, PVC and LSZH


optical fiber jumper is constructed from a core with a high refractive index, surrounded by a coating with a low refractive index that is surrounded by a protective jacket. Transparency of the core permits transmission of optic signals with little loss over great distances. The coating’s low refractive index reflects light back into the core, minimizing signal loss. The protective jacket minimizes physical damage to the core and coating.


Ordinary cables measure 125µm in diameter (a strand of human hair is about 100µm). The inner diameter measures 9µm for single-mode cables, and 50/62.69µm for multi-mode cables.

The development of “reduced bend radius” fiber in the mid-2000s, enabled a trend towards smaller cables. Each unit of diameter reduction in a round cable, produces a disproportionate corresponding reduction in the space the cable occupies.


Patch cords are classified by transmission medium (long or short distance), by connector construction and by construction of the connector’s inserted core cover.

Transmission medium

Single-mode fiber is generally yellow, with a blue connector, and a longer transmission distance. Multi-mode fiber is generally orange or grey, with a cream or black connector, and a shorter 
transmission distance.

Connector construction

Connector design standards include FC, SC, ST, LC, MTRJ, MPO, MU, SMA, FDDI, E2000, DIN4, and D4. Cables are classified by the connectors on either end of the cable; some of the most common cable configurations include FC-FC, FC-SC, FC-LC, FC-ST, SC-SC, and SC-ST.

Inserted core cover

The connector’s inserted core cover conforms to APC, UPC, or PC configuration. A UPC inserted core cover is flat and is used in SARFT and early CATV. An APC connector’s inserted core cover is 
oblique (about 30 °, ±5 °).


Patch cables are used for connections to CATV (Cable Television), telecommunication networks, computer fiber networks and fiber test equipment. Applications include communication rooms, FTTH (Fiber to The Home), LAN (Local Area Network), FOS (fiber optic sensor), Fiber Optic Communication System, Optical fiber connected and transmitted equipment, Defense combat readiness, etc.

FiberStore supply fiber optic patch cable with different connector and cable type. The common core sizes of multimode fiber are OM1 62.5 micron and 50 micron in OM2 or 10 Gigabit Laser Optimized OM3. We offersingle mode fiber patch cables and multimode fiber patch cable with a variety of connector types such as LC, FC, SC, ST, MU, MTRJ and E2000.Duplex fiber cables consist of two fiber cores and can be either multimode or singlemode. We also can customize patch cables in any cut length.