Function

The optical amplifier (OA) is a C-band pluggable optical amplification module, which can be configured at the transmit or receive end of a device according to the actual scenario.

**Table 1** OA functions
Function	Description
Basic function	Amplifies optical signals over C-band wavelengths in the range from 1535 nm to 1547 nm.
Pluggable	Is pluggable.
Gain adjustment	Adjusts the gain based on the input optical power to achieve continuous gain adjustment in the range from 9 dB to 23 dB.
Power adjustment	Fixes the output power at 7 dBm according to the input power range.
Working mode	In the power locking and gain locking modes, the gain of the EDFA module is adjustable and its actual gain can be queried.
Performance and alarm monitoring	Monitors and reports optical power. Controls the temperature of the pump laser. Monitors the pump drive current, cooling current, pump laser temperature, and ambient temperature of the board.