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

Minoru YAMADA  Itaru TERA  Kenjiro MATSUOKA  Takuya HAMA  Yuji KUWAMURA  

IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.8   pp.1444-1446
Publication Date: 2012/08/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.1444
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Lasers, Quantum Electronics
semiconductor laser,  optical feedback noise,  noise reduction,  electric negative feedback,  high frequency current superposition,  

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Reduction 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.