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What patch cord is used for the optical module

What patch cord is used for the optical module

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The type of patch cord used for an optical module depends on the fiber type (single-mode or multimode) and the connector type (LC, SC, MPO, etc.) compatible with the module.

Fiber Type Selection

  • Single-Mode Fiber (SMF): Suitable for long-distance transmission, typically using OS2 fiber. Common for campus or inter-building links, supporting distances from 10 km up to 80 km or more. Single-mode fibers are usually yellow and have a small core diameter, allowing minimal signal loss over long distances .
  • Multimode Fiber (MMF): Ideal for short-distance, high-speed connections within data centers or buildings. Common specifications include OM1, OM2, OM3, OM4, and OM5, with OM3/OM4/OM5 supporting higher bandwidth and longer distances. Multimode fibers are color-coded (OM1/OM2 = orange, OM3/OM4 = aqua, OM5 = lime green or violet), .

Connector Types

  • LC (Lucent Connector): Small, duplex connector, widely used in modern data centers and QSFP transceivers. Preferred for high-density environments .
  • SC (Subscriber Connector): Larger, robust connector, commonly used in telecom and FTTH networks .
  • MPO/MTP: Multi-fiber connectors suitable for high-density parallel transmission, such as 100G or 400G modules .
  • Other connectors: ST, FC, MU, MT-RJ, E2000, and hybrid combinations (e.g., LC to SC) are available depending on specific applications .

Patch Cord Configuration

  • Simplex: Single fiber, one-way communication (Tx or Rx).
  • Duplex: Two fibers, two-way communication (Tx/Rx), commonly used in Ethernet and PON links .
  • Armored: Extra protection for rugged environments or industrial applications .

Practical Considerations

  • Distance and speed: Match fiber type to the module's wavelength (e.g., 850 nm for multimode, 1310/1550 nm for single-mode) and required link distance .
  • Avoid mixing fiber types: Connecting single-mode to multimode fibers can cause severe signal loss or link failure .
  • Jacket material: Choose PVC, LSZH, OFNR, or OFNP based on fire safety and installation environment .
  • Future scalability: Opt for higher-spec fibers (e.g., OM4 instead of OM3) to support future network upgrades . In summary, select a patch cord that matches the optical module's fiber type, connector type, and distance requirements, ensuring high-quality, low-loss transmission and compatibility with your network infrastructure .
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