Title :
Up to 15dB improvement in second harmonic distortion in complex-coupled DFB semiconductor lasers
Author :
Novak, D. ; Lowery, Arthur J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia
Abstract :
The Letter numerically demonstrates that a pure gain-coupled distributed feedback (GC-DFB) laser exhibits more than 12dB lower second harmonic distortion than an equivalent index-coupled DFB laser at a modulation frequency of 1GHz. Furthermore, the addition of index coupling to the gain-coupled device can give a further 3dB reduction in the distortion level.
Keywords :
distributed feedback lasers; optical communication equipment; optical modulation; semiconductor lasers; 1 GHz; DFB semiconductor lasers; complex-coupled; distortion level; distributed feedback; gain-coupled device; index coupling; modulation frequency; optical communications equipment; pure gain-coupled; second harmonic distortion;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931301
