How to use Huawei optical amplifier

Huawei optical amplifiers amplify optical signals in C-band networks and can be configured at the transmit or receive end to optimize signal strength and quality.

Installation and Setup

1. Identify the Installation Point: Optical amplifiers (OAs) are typically installed at the transmit (TX) end of a link, especially for single-span applications or when using long-distance modules like 80 km QSFP-DD optical modules. If the link loss is below 22 dB, a site survey may not be required .
2. Physical Installation:
   • Ensure the amplifier is pluggable and correctly oriented according to the signal direction indication on the module .
   • Connect the receive (RX) port to the incoming fiber and the transmit (TX) port to the outgoing fiber.
   • Use the pull tab and connectors to secure the module in the device slot.
3. Power and Environment:
   • Verify the power supply is stable and compatible with the amplifier.
   • Monitor the pump laser temperature, drive current, cooling current, and ambient temperature to ensure safe operation .

Configuration

1. Gain Adjustment:
   • Huawei OAs support continuous gain adjustment. For example, the TN13OAU101 has a gain range of 20–31 dB, while the TN12OAU103 provides high-output gain across the C-band .
   • Gain can be set in power locking or gain locking modes, allowing you to fix output power or adjust gain according to input optical power .
2. Output Power:
   • Typical output power ranges from 7 dBm to 20 dBm, depending on the model and network requirements .
   • Ensure the input optical power is within the specified range (e.g., 0 dBm for TN13OAU101) to avoid signal distortion .
3. Monitoring:
   • Use the device interface or network management system (NMS) to monitor optical power, gain, and module status.
   • Check for alarms related to pump laser, temperature, or fiber connection issues.

Troubleshooting

• Check Fiber Connections: Ensure all fibers are clean and properly connected.
• Verify Input Levels: Confirm the input optical power is within the recommended range for the amplifier model .
• Inspect Power Supply: Ensure the amplifier receives stable voltage and current.
• Monitor Module Status: Use the NMS or device interface to check for abnormal readings in gain, output power, or temperature .

Model-Specific Notes

• TN13OAU101: C-band amplifier with 0 dBm input, 20 dBm output, gain 20–31 dB, suitable for long-distance links .
• TN12OAU103: EDFA-based amplifier for DWDM networks, providing high gain and low noise across the C-band .
• TN11SRAU02: Hybrid Raman and EDFA amplifier, input -7 dBm max, output 20 dBm, gain 27–38 dB, ideal for high-capacity long-distance systems . By following these steps, Huawei optical amplifiers can be effectively deployed to enhance signal strength, extend transmission distance, and maintain high-quality optical communication.