Title :
74 nm wavelength tuning range of an InGaAsP/InP vertical grating assisted codirectional coupler laser with rear sampled grating reflector
Author :
Öberg, M. ; Nilsson, S. ; Streubel, K. ; Wallin, J. ; Bäckbom, L. ; Klinga, T.
Author_Institution :
Swedish Inst. of Microelectron., Kista, Sweden
fDate :
7/1/1993 12:00:00 AM
Abstract :
A vertical-grating-assisted codirectional coupler laser with rear sampled grating reflector (GCSR laser) combines single-mode operation over a very wide tuning range of 74 nm with a side-mode suppression of better than 30 dB over most of the wavelength span. The total tuning span is limited by the combined bandwidths of the active material gain curve and the envelope of the sampled grating reflection peak spectrum, while the tuning capacity of the directional coupler filter alone is estimated to be at least 140 nm.<>
Keywords :
III-V semiconductors; diffraction gratings; directional couplers; gallium arsenide; gallium compounds; indium compounds; laser modes; laser tuning; optical couplers; optical filters; semiconductor lasers; InGaAsP-InP; active material gain curve; directional coupler filter; rear sampled grating reflector; semiconductor laser diodes; side-mode suppression; single-mode operation; total tuning span; tuning capacity; vertical grating assisted codirectional coupler laser; wavelength span; wavelength tuning range; wide tuning range; Bandwidth; Distributed Bragg reflectors; Gratings; Indium phosphide; Laser tuning; Optical coupling; Optical filters; Optical reflection; Optical tuning; Optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
