DET20 series bias photodetector for mW level optical power detection, using free space light input, the series of photodetectors without amplification circuit, with very low noise, the module using analog signal output.
Small signal EDFA erbium-doped fiber amplifier is used to amplify weak light signals or as a preamplifier for weak light detection, and is widely used in fiber optic sensing systems and fiber optic communication network systems.