Why are multi-mode patch cords usually orange or aqua (water green)? What are the typical applications for this type of fiber?
A multi-mode fiber patch cord is an optical fiber cable that has a larger core diameter (typically 50 μm or 62.5 μm) compared to single-mode fiber (9 μm). This allows multiple modes of light to propagate simultaneously through the core.
Regarding your specific questions about color coding and applications:
1. Why are they usually Orange or Aqua?
The colors of the outer jacket are standardized to help technicians quickly identify the type of fiber and its performance characteristics (specified by the TIA-598-C standard):
- Orange: Typically represents OM1 (62.5/125 μm) or OM2 (50/125 μm) multi-mode fibers. These are older standards used for lower speed or shorter distance transmissions.
- Aqua (Water Green): Represents OM3 or OM4 laser-optimized multi-mode fibers (50/125 μm). These are designed for higher bandwidth and are commonly used in 10GbE, 40GbE, and 100GbE networks.
2. Typical Applications
Multi-mode fiber patch cords are primarily used for short-distance data transmission due to modal dispersion, which limits the signal distance at high speeds. Typical scenarios include:
- Data Centers: Connecting servers, switches, and storage arrays within racks or between adjacent rows.
- Local Area Networks (LANs): Backbone cabling within a single building or campus.
- Industrial Sensing: In certain Fiber Bragg Grating (FBG) sensing applications, multi-mode fibers are used when high power coupling is required or in specific spectroscopy environments, though single-mode fiber remains the standard for most FBG sensors.
Related DCYS (OFSCN) Products
If your application requires high durability or specific environmental resistance, we provide specialized multi-mode patch cords:
- OFSCN® 2.0mm Micro Steel Armored Fiber Optic Patch Cord: This product uses a 0.6mm stainless steel seamless tube to protect the fiber, making it suitable for harsh environments while maintaining a slim profile.
- OFSCN® 120℃ MM High-temperature Optical Fiber: Designed for environments where temperatures reach up to 120°C.
Product Images:
If you are considering a specific project, please let me know the required transmission distance and the environment the cable will be placed in so I can provide a more technical recommendation.