Recent advances in the research of semiconductor distributed feedback (DFB) lasers have empirically verified the threshold degeneracy of two longitudinal modes pointed out by Kogelnik and Shank; removing the degeneracy to accomplish a complete single-mode operation has become one of the main interests. Several methods have been studied both theoretically and experimentally, including those making use of an antisymmetric step of the coupling coefficient,1,2 a symmetric variation in the grating period,3 and a phaseadjusting region inside the cavity.2,4 Another method uses a stripe-width modulation,5 which is believed to be simple and versatile compared with the others. The purpose of this work is to achieve a complete single-longitudinal-mode operation in DFB lasers by the modulated stripe-width (MSW) structure, thus confirming experimentally the validity of the scheme.

© 1987 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription