Title :
Enhanced dynamics of QWS-DFB lasers by longitudinal variation of their coupling coefficient
Author :
Fessant, Thierry
Author_Institution :
Lab. RESO, Ecole Nat. d´´Ingenieurs de Brest, Brest, France
Abstract :
Time-domain simulations performed on quarter-wave-shifted (QWS) distributed-feedback (DFB) lasers show that large-signal dynamics of such structures can be greatly enhanced by adequate longitudinal variation of their coupling coefficient K. Indeed, mode instabilities induced by spatial hole burning (SHE) can be less disastrous on the performance of distributed-coupling-coefficient QWS-DFB (QWS-DCC-DFB) lasers with respect to their conventional QWS-DFB (uniform coupling profile) counterparts.
Keywords :
coupled mode analysis; distributed feedback lasers; laser beams; laser feedback; laser modes; laser stability; optical couplers; optical hole burning; optical modulation; semiconductor lasers; coupling coefficient; distributed-coupling-coefficient; distributed-feedback lasers; enhanced dynamics; large-signal dynamics; longitudinal variation; mode instabilities; quarter-wave-shifted distributed-feedback laser; spatial hole burning; time-domain simulations; uniform coupling profile; Equations; Gratings; Laser modes; Laser stability; Optical coupling; Optical device fabrication; Optical fiber communication; Optical modulation; Semiconductor lasers; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
