EDFA amplifier

Hi, friend！
We've noticed about your question, and we're processing on it.

Dear friend！

The transition degree of particles produced by the erbium-doped fiber irradiated by the pump light at different wavelengths is different, which belongs to physics knowledge.

Wavelengths of the pump light source of the EDFA can be 520 nm, 650 nm, 980 nm, and 1480 nm. However, practice proves that the pump light source of the wavelength of 1480 nm has the highest laser efficiency, and the amplification effect of the optical signal is more obvious. Next is the pump light source with wavelength of 980 nm.

The EDFA works in three modes:

Automatic power control (APC). The output power does not change with the input,

Automatic gain control (AGC). The output power varies with the input. The output-to-input ratio is fixed, that is, the EDFA amplification multiple is fixed.

Constant current control (ACC). The working current of the EDFA is fixed. The output varies with the input. The larger the input is, the larger the output is, until the saturation is reached.

The purpose of the gain averager is to implement multi-channel comb flattening filtering to rapidly attenuate the pattern outside the desired comb bandwidth. He's part of the optical amplifier.

Thanks！