You will find three common types of 10G SFP+ modules – SFP-10G-SR, SFP-10G-LRM, and SFP-10G-LR, typically used for optical fiber. However, in practical use, how should we choose among these three modules? This article will analyze it for you.

Exploring the Versatility of SFP-10G-SR, SFP-10G-LR, and SFP-10G-LRM Modules

SFP-10G-SR can be paired with OM3 multimode fiber (MMF), with a transmission distance of up to 300 meters. It is acclaimed as the lowest cost and lowest power consumption module utilizing VCSEL.

SFP-10G-LR is a module using a distributed feedback laser (DFB). It operates at a wavelength of 1310nm, and its transmission distance through single-mode fiber (SMF) can reach 10 kilometers. It is used for building wiring in large campus areas and even for establishing a Metropolitan Area Network (MAN).

SFP-10G-LRM supports a link length of 220m on standard Fiber Distributed Data Interface (FDDI) grade multimode fiber. To ensure compliance with FDDI grade, OM1, and OM2 fiber specifications, the transmitter should be coupled with a mode conditioning patch cable. Applications on OM3 or OM4 do not require a mode conditioning patch cable.

Conclusion

In general, when the transmission distance is less than 300 meters, it is recommended to use SFP-10G-SR. However, if you have other requirements, such as a 200m transmission with a mode bandwidth of 500 MHz km, then an SFP-10G-LRM transceiver is needed. For single-mode transmission within 300 meters, choosing SFP-10G-LRM is an economical solution. But for transmissions of 2-10 kilometers, SFP-10G-LR is the only choice.

Click to learn more: SFP-10G-SR vs SFP-10G-LRM vs SFP-10G-LR, Which to Choose? | FS Community

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