Semiconductor optical amplifier module

摘要

A semiconductor optical amplifier (SOA) module relies on Amplified Spontaneous Emission (ASE) from the first stage of an SOA in feedback-based regulation of the amplification factor. The ASE (202) is deflected by an isolator (243) in the input unit (240) at a prescribed angle from a traveling path of the input optical signal (201) and toward a photo-detector (260) that detects the power of the ASE light (202). Regulation is performed by a controller (280) that receives the detected power level from the photo-detector (260) and also receives from another photo-detector (270) a power level of the optical signal (203) after amplification in the SOA (210).