Om3 Fiber Color Ring

OM3 multimode fiber is typically identified by an aqua jacket, and additional ring markings may be used for high-count cables to distinguish individual fibers.

OM3 Fiber Color Identification

OM3 is a laser-optimized 50/125 µm multimode fiber designed for high-speed networks using VCSELs, supporting 10, 40, or 100 Gb/s over short distances (up to 300 meters at 10G) . The standard jacket color for OM3 is aqua (hex: #00B6C1), which helps technicians quickly identify the fiber type in patch panels, cable trays, or splice closures .

Ring Markings for High-Count Cables

For cables containing more than 12 fibers, ring markings are applied to individual fibers to differentiate them within a bundle. This is often done according to IEC or DIN standards, where fibers 13-24 receive an additional ring marking to maintain proper identification in hybrid or high-density cables . Corning's ColorPro® technology also enables colored and ring-marked variants of OM3 fibers, simplifying inventory management and installation .

Comparison with Other Multimode Fibers

• OM2: Typically gray jacket, 50 µm core, 500 MHz·km bandwidth at 850 nm .
• OM4: Aqua jacket like OM3, sometimes violet depending on manufacturer, higher bandwidth (4,700 MHz·km at 850 nm) .
• OM5: Bright lime green jacket, designed for SWDM applications .

Practical Notes

• Always verify fiber markings, as some early OM2 or OM3 installations may use non-standard colors .
• Ring markings are especially important in high-density or ribbon cables to avoid misidentification during splicing or termination .
• OM3 fibers are widely used in enterprise and data center networks due to their compatibility with 10G and 40G Ethernet and ease of identification via color coding . By using the aqua jacket and optional ring markings, OM3 fibers can be quickly distinguished from other multimode fibers, ensuring proper network performance and reducing installation errors.