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Huawei 50Ge Optical Module Light Reception Threshold

The recommended receive optical power for Huawei 50Ge optical modules is less than -4 dBm, with a maximum safe power of -2.3 dBm to prevent permanent damage.

Recommended Operating Range

For stable long-term operation, Huawei specifies that the receive optical power should be less than -4 dBm. Exceeding this level may risk module damage, and the absolute maximum receive power is -2.3 dBm, beyond which the module can be permanently damaged .

Measurement and Protection

Before connecting the module, it is advised to measure the receive optical power using an optical power meter. If the measured power exceeds -4 dBm, an optical attenuator should be added at the receive end. Huawei recommends an attenuator of at least 10 dB for short-distance connections or loopback tests to ensure safe operation .

Operational Notes

  • When interconnecting with WDM devices, the module may require FEC (Forward Error Correction) to achieve nominal data rates .
  • For self-loop or short-distance connections, always use an attenuator to reduce the receive power to safe levels, typically ≥7 dB for 50GBASE-ER 40 km modules .
  • Regular monitoring of receive power is recommended to prevent alarms or module faults. If the receive power is too low, check connections and fiber quality; if too high, adjust attenuation accordingly .

Summary

  • Recommended receive power: < -4 dBm
  • Maximum safe receive power: -2.3 dBm
  • Attenuator recommendation: ≥10 dB for short distances or loopback, ≥7 dB for 50GBASE-ER 40 km modules
  • Measurement tool: Optical power meter Following these thresholds ensures stable operation and prevents damage to Huawei 50Ge optical modules while maintaining reliable high-speed data transmission .

Huawei 50Ge Optical Module Light Reception Threshold - Yacht Communications & Industrial Optics [PDF]

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