Title :
Single-longitudinal-mode condition for DFB lasers
Author :
Motosugi, G. ; Yoshikuni, Y. ; Ikegami, T.
Author_Institution :
NTT Atsugi Electrical Communication Laboratory, Atsugi, Japan
Abstract :
We show theoretically that the loss difference of about 10% is required between the main mode and the side mode for a semiconductor laser to oscillate in single-longitudinal mode. The DFB laser has been found to meet this requirement, and a side-mode suppression of more than 30 dB was observed under high-speed direct modulation.
Keywords :
distributed feedback lasers; integrated optics; laser modes; optical modulation; semiconductor junction lasers; DFB lasers; distributed feedback lasers; high-speed direct modulation; integrated optics; semiconductor laser; side-mode suppression; single-longitudinal mode; spectral dynamics;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850248
