Why Are 25G SR and Long-Reach 10G Optical Transceivers Gaining Higher Demand?

25G optics for short-distance links, and 10G optics for long-haul connections — this is an interesting emerging trend in optical networking.

Recently we have seen growing order volume for three popular optical transceiver models:

• 25G SFP28 SR: 850nm wavelength, max 100m transmission over multimode fiber
• 10G SFP+ ER: typically 1550nm wavelength, up to 40km over single-mode fiber
• 10G SFP+ ZR: typically 1550nm wavelength, up to 80km over single-mode fiber

At first glance, these optical modules cater to vastly different networking scenarios. Yet there is a clear, compelling logic behind the simultaneous rise in demand.

1. Higher bandwidth for short-distance connections

25G SR Delivers Higher Bandwidth for Short-Distance Connections 25G SFP28 SR serves as a cost-effective upgrade option for data centers and enterprise networks. It can leverage existing multimode fiber cabling infrastructure to run faster short-reach links without full cable replacement.

Long-Reach 10G Optics Remain Essential for Telecom & ISP Networks Not all network deployments require 100G, 400G or higher-speed transceivers. For many ISPs, telecom operators and enterprise WAN projects, 10G SFP+ ER and 10G SFP+ ZR still deliver sufficient bandwidth and long transmission range to match business requirements.

Network Upgrades Do Not Require Full Infrastructure Replacement Network modernization does not always mean ripping out all existing hardware. A common practical strategy is to boost bandwidth at short-reach hotspots with 25G SR optics, while keeping stable long-distance transmission using mature 10G ER / ZR transceivers in other parts of the network.

These points are based on real customer order observations, not generalized conclusions for the global optical component market.

Final Takeaway Network evolution is not a simple race to upgrade every link to higher speeds. Successful network design relies on selecting optical transceivers with the optimal speed and reach for each individual use case.

Are you also witnessing rising demand for 25G SR or long-reach 10G optical transceivers in your regional market?