Title :
Yield analysis of non-AR-coated DFB lasers with combined index and gain coupling
Author :
David, K. ; Morthier, G. ; Vankwikelberge, P. ; Baets, R.
Author_Institution :
Lab. of Electromagnetism & Acoust., Gent Univ., Belgium
Abstract :
The threshold gain difference for DFB lasers with various degrees of gain coupling and different strengths of facet reflectivities is calculated as a function of the random phases between grating and facet reflectivities. From this, the yield for single mode behaviour is determined. It is shown that even for cleaved facets a relevant improvement in terms of threshold gain difference is obtained by introducing a small fraction of gain coupling.
Keywords :
diffraction gratings; distributed feedback lasers; laser cavity resonators; laser modes; laser theory; semiconductor junction lasers; DFB lasers; cleaved facets; coherent optical communications; combined index/gain coupling; facet reflectivities; grating; non-AR-coated; nonantireflection coated laser; semiconductor lasers; single mode behaviour; threshold gain difference; yield analysis;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900160
