Laser functional device

摘要

A laser functional device formed by photoelectric direct loop coupling of a laser diode and a photodetector, the latter of which receives a part of an output light of the former together with an external input light and excites the former by an output current thereof, can be easily miniaturized and integrated as a fundamental function active device self-containing a light source and presenting various useful functions of the optoelectronic technology between the external input and the output lights.