Title :
Theoretical calculation of the linewidth enhancement factor of DFB lasers
Author :
Ogita, S. ; Yano, M. ; Imai, H.
Author_Institution :
Fujitsu Laboratories Ltd., Atsugi, Japan
Abstract :
The linewidth enhancement factor ¿ of a single-longitudinal-mode DFB laser is theoretically analysed. It is shown that the oscillating wavelength should be selected at the wavelength 100¿200 Å shorter than that of the gain peak to obtain a smaller ¿ value. It is also shown that the lower threshold gain gives a smaller linewidth enhancement factor.
Keywords :
distributed feedback lasers; semiconductor junction lasers; DFB lasers; calculation; distributed feedback lasers; linewidth enhancement factor; oscillating wavelength; single-longitudinal-mode DFB laser; threshold gain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860394
