Title :
Feedback-induced noise in index-guided semiconductor lasers and its reduction by modulation
Author :
Stubkjaer, K. ; Small, M.B.
Author_Institution :
IBM Thomas J. Watson Research Center, Yorktown Heights, USA
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 :
electron device noise; optical modulation; semiconductor junction lasers; 15 to 20 dB; 265 mA modulation current; 5 to 15 cm; 50 to 200 MHz; cavity length dependence; feedback noise reduction; index guided semiconductor lasers; modulation; modulation frequency;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830269
