Title :
The optimal loop gain design for the spectral linewidth reduction in an electrical feedback semiconductor laser
Author_Institution :
Dept. of Electron., Zhengzhou Univ., Henan, China
fDate :
8/1/1991 12:00:00 AM
Abstract :
The design of the optimal feedback loop gain for the spectral linewidth reduction in a semiconductor laser with electrical feedback is presented using a model of self-heterodyne type electrical feedback. The results show that the feedback loop gain must be suitably chosen to satisfy the requirement of narrowing linewidth. Due to the influence of AM noise in the feedback process, there is an optimal value for the feedback loop gain to reduce the linewidth for a given feedback condition. The influence of other feedback parameters on the linewidth reduction is also presented
Keywords :
amplitude modulation; electron device noise; feedback; laser theory; optical modulation; semiconductor junction lasers; spectral line breadth; AM noise; electrical feedback semiconductor laser; feedback loop; optimal loop gain design; self-heterodyne type electrical feedback; spectral linewidth reduction; Feedback loop; Frequency modulation; Laser feedback; Laser modes; Laser noise; Noise reduction; Optical feedback; Optical noise; Semiconductor device noise; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
