Title :
Monolithic integration of DFB laser with spot-size transformer for highly efficient laser fibre coupling
Author :
Zengerle, R. ; Hübner, B. ; Gréus, C. ; Burkhard, H. ; Janning, H. ; Kuphal, E.
Author_Institution :
Forschungs- und Technologiezentrum, Deutsche Telecom AG, Darmstadt, Germany
fDate :
7/6/1995 12:00:00 AM
Abstract :
The monolithic integration of a mushroom type InGaAs-InGaAsP MQW DFB laser with a spot-size transformer based on a two-layer lateral taper is reported. Highly efficient coupling to a butt-joined dispersion shifted singlemode fibre with a coupling loss down to 0.9 dB and large alignment tolerances was achieved, maintaining the good spectral characteristics of an isolated DFB-laser structure
Keywords :
III-V semiconductors; distributed feedback lasers; gallium arsenide; gallium compounds; indium compounds; integrated optoelectronics; optical couplers; optical fibre couplers; quantum well lasers; 0.9 dB; DFB laser; InGaAs-InGaAsP; InGaAs-InGaAsP MQW DFB laser; butt-joined dispersion shifted singlemode fibre; coupling loss; good spectral characteristics; highly efficient coupling; highly efficient laser fibre coupling; isolated DFB-laser structure; large alignment tolerances; monolithic integration; mushroom type; spot-size transformer; two-layer lateral taper;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19950804
