1000BASE-EX SFP 1550nm 40km DOM Duplex LC/UPC SMF Optical Transceiver Module

The 1000BASE-EX SFP 1550nm 40km Optical Transceiver Module is specifically designed for long-distance Gigabit Ethernet communication, utilizing a 1550nm wavelength to achieve stable and high-performance data transmission over single-mode fiber (SMF). Compared to the 1310nm wavelength, the 1550nm wavelength offers lower fiber attenuation, making it more efficient for long-haul optical transmission over 40km or more.

The 1550nm wavelength is ideal for 40km fiber optic transmission primarily due to its lower attenuation in standard single-mode fiber (SMF). At approximately 0.2 dB/km, its signal loss is significantly less than the 0.35 dB/km experienced at 1310nm. This reduced attenuation over long distances ensures superior signal integrity, transmission efficiency, and minimizes degradation. Furthermore, 1550nm offers higher transmission stability for extended links like 40km, experiencing manageable dispersion effects that support reliable performance, unlike the higher attenuation-limited 1310nm over such distances.

Key differences distinguish 1550nm and 1310nm: 1550nm provides lower attenuation (~0.2 dB/km) enabling distances of 40km+, while 1310nm has higher attenuation (~0.35 dB/km) limiting it typically to 10-20km. Although 1310nm inherently has less dispersion, its higher loss makes it impractical for 40km reach. Consequently, 1550nm is optimized for long-haul communication and is the standard for Dense Wavelength Division Multiplexing (DWDM) and carrier-grade networks demanding extended reach.

This makes 1550nm transmission critical for applications including Metropolitan Area Networks (MANs), ISP/Telecom backbones, enterprise/government networks connecting remote sites, Data Center Interconnect (DCI), and Fiber-to-the-Building/Home (FTTB/FTTH). The 1000BASE-EX SFP 1550nm 40km module leverages these advantages to deliver an efficient, reliable, long-range solution for high-performance fiber connectivity.