Feedback-induced noise in index-guided semiconductor lasers and its reduction by modulation

12 May 1983

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 19 (10) , 388-390
https://doi.org/10.1049/el:19830269

Abstract

We report a reduction in feedback noise of 15–20 dB by direct modulation of the laser with a 2–5 mA modulation current. The reduction is almost independent of modulation frequency in the frequency range from 50 MHz to 200 MHz, but depends on the external cavity length. The external cavity lengths considered are 5–15 cm.

Keywords

15 TO 20 DB
5 TO 15 CM
INDEX GUIDED SEMICONDUCTOR LASERS
MODULATION
MODULATION FREQUENCY
265 MA MODULATION CURRENT
CAVITY LENGTH DEPENDENCE
50 TO 200 MHZ
FEEDBACK NOISE REDUCTION

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