A green optical fiber is typically OM5 multimode fiber, designed for high-speed, short-range communication using multiple light modes.

Identification and Characteristics

Green-jacketed optical fiber corresponds to OM5 multimode fiber, also known as wideband multimode fiber (WBMMF) . OM5 fiber has a 50 µm core diameter, similar to OM2, OM3, and OM4 fibers, allowing multiple light modes to propagate simultaneously. This multimode design supports short-range, high-bandwidth applications, including data centers and enterprise networks, and is optimized for Short Wave Division Multiplexing (SWDM), enabling at least four WDM channels at speeds of 28 Gbps per channel over the 850–953 nm wavelength range .

Applications

OM5 multimode fiber is ideal for high-speed LANs, campus networks, and data center backbones, where distances are relatively short (typically up to 550 meters at 10 Gbps) . Its multimode nature allows the use of VCSEL-based transceivers, which are cost-effective and energy-efficient compared to single-mode laser modules .

Comparison with Other Multimode Fibers

• OM1: Orange jacket, 62.5 µm core, LED source, suitable for 100 Mbps to 1 Gbps over short distances.
• OM2: Orange or gray jacket, 50 µm core, LED source, supports up to 10 Gbps over ~82 meters.
• OM3/OM4: Aqua jacket, 50 µm core, laser-optimized, supports 10–100 Gbps over longer distances.
• OM5: Lime green jacket, 50 µm core, optimized for SWDM, supports multiple high-speed channels simultaneously .

Summary

The green color of the fiber jacket indicates OM5 multimode fiber, which is designed for high-bandwidth, short-range communication using multiple light modes. Its multimode design allows multiple wavelengths to propagate, making it suitable for modern data centers and enterprise networks requiring scalable, high-speed optical connections .