Reduction of Intensity Noise in Semiconductor Lasers by Simultaneous Usage of the Superposition of High Frequency Current and the Electric Negative Feedback

Abstract

SUMMARYReduction of the intensity noise in semiconductor lasers is an important subject for the higher performance of an application. Simultaneous usage of the superposition of high frequency current and the electric negative feedback loop was proposed to suppress the noise for the higher power operation of semiconductor lasers. Effective noise reduction of more than 25 dB with 80 mW operation was experimentally demonstrated. key words: semiconductor laser, optical feedback noise, noise reduction, electric negative feedback, high frequency current superposition