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10G Optical Module Selection Guide: LRM, SR, LR, ER, ZR Compatibility and Considerations

  • May 23. 2025

In the construction of high-speed networks, 10G optical modules are core components of data centers, enterprise networks, and telecommunication networks. However, facing the numerous models on the market , such as LRM, SR, LR, ER, ZR and other optical modules , how to choose the most suitable module becomes a key issue.


In this article, ETU-LINK will deeply analyze the differences between different 10G SFP+ dual-fiber optical modules from multiple dimensions such as technical parameters, transmission distance, optical fiber type, typical applications, etc., and guide you to make the optimal choice in different scenarios.


1. 10G SFP+ Dual Fiber Optic Module Overview

The 10G SFP+ dual-fiber optical module is a small pluggable optical transceiver that adopts a dual-fiber bidirectional design. It completes signal transmission (Tx) and reception (Rx) through two independent optical fibers , ensuring the stability and reliability of signal transmission .


It complies with IEEE802.3ae, SFF - 8472 and SFF - 8431 standards, and can provide a transmission rate of up to 10Gbps to meet the needs of high-speed data transmission. Compared with single-fiber modules, the dual-fiber structure has higher signal isolation and stability, and is widely used in data centers, enterprise networks and telecommunications transmission scenarios.


2. Comparison of 10G SFP+ Dual-Fiber Optical Module Core Types and Key Technologies

In actual network construction and upgrade, it is necessary to select the appropriate 10G optical module based on specific transmission distance, wavelength, network environment and cost factors.


Following is a comparison table of 10G SFP+ dual-fiber optical module core types and key technologies:




3. Common Selection Misunderstandings and Pitfall Avoidance Guide


(1) Misconceptions: Mixing multimode and single mode

LRM /SR only supports multi-mode optical fiber, LR/ER/ZR only supports single-mode optical fiber, and mixing them will result in communication failure.


(2) Misconceptions: Ignoring the Effect of Dispersion

The ZR module requires dispersion compensation (DCM) when transmitting over 80 km, otherwise the signal will be severely degraded.


(3) Misconceptions: Excessive pursuit of long distance

If the actual distance is only 10km, choosing ZR will significantly increase the cost, and LR or ER will be more economical.


(4) Misconceptions: Ignoring compatibility testing

Optical modules from different manufacturers may have compatibility issues and need to be verified before deployment.



4. Choosing 10G SFP+ dual-fiber optical modules requires the following decision chain


(1) 1. Clear distance requirements: short distance (LRM /SR ), medium distance (LR/ER), long distance (ZR) ;

(2) 2. Confirm the fiber type : multimode (LRM /SR ) or single mode (LR/ER/ZR) ;

(3) 3. Evaluate costs and scalability : Balance current budget with future upgrade space.


How about this look is not on the 10G SFP + Dual Fiber Optical Module classification and selection skills have a clearer understanding of it?

Next, follow to see what are the 10G SFP+ Dual Fiber Optical Modules of ETU-LINK.


As a professional module manufacturer, ETU-LINK can provide 1G-800G optical modules. The following are several popular 10G SFP+ dual-fiber optical modules from ETU-LINK:



The selection of 10G SFP+ dual-fiber optical modules is a systematic project that requires comprehensive consideration of technical parameters, compatibility, cost-effectiveness and future development. SR/LRM maintains a cost-effective advantage in short-distance transmission, while LR/ZR provides a reliable solution for long-distance networking. By deeply understanding the differences and performance of LRM, SR, LR, ER, and ZR optical modules, we can make the right choice among many optical modules, thereby building an efficient, stable, and economical network communication system.


About ETU-LINK

ETU-Link Technology Co., Ltd. was founded in 2014. It is a high-tech enterprise focusing on the research and development, production and sales of optical communication devices. With high-speed optical modules as its core products, the company professionally serves the optical fiber communication markets such as telecommunications, data communications, and storage.

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