Title :
Determination of coupling coefficient of DFB lasers by a newly proposed method
Author :
Hirayama, Yuzo ; Okuda, Haruhisa ; Furuyama, H. ; Kinoshita, J. ; Nakamura, Mitsutoshi
Author_Institution :
Toshiba Corporation, Research & Development Center, Kawasaki, Japan
Abstract :
A new method of estimating the coupling coefficient of DFB lasers is proposed. A sub/main-mode spectral intensity ratio below the threshold current is employed in this method, instead of the stop-bandwidth used in the conventional method. It is demonstrated both theoretically and experimentally that the new method is capable of more accurate determination of the coupling coefficient of DFB lasers with phase-shifted corrugations.
Keywords :
distributed feedback lasers; semiconductor junction lasers; DFB lasers; coupling coefficient; phase-shifted corrugations; spectral intensity ratio; threshold current;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870072
