Title :
Resonance frequency, damping, and differential gain in 1.5 μm multiple quantum-well lasers
Author :
Tatham, M.C. ; Lealman, I.F. ; Seltzer, Colin P. ; Westbrook, L.D. ; Cooper, D.M.
Author_Institution :
British Telecom Res. Lab., Ipswich, UK
fDate :
2/1/1992 12:00:00 AM
Abstract :
A systematic investigation is presented into the intrinsic frequency response of quantum-well lasers, using parasitic-free relative intensity noise (RIN) measurements. There is shown to be a strong dependence of the resonance frequency on the number of quantum wells in the active region, originating from variations both in internal losses and in differential gain. The differential gain is found to have values higher than in corresponding bulk lasers, but only in devices with a large number of wells. The damping is also found to vary in a manner consonant with the changes in differential gain; however, comparison with bulk lasers indicates substantially stronger gain suppression in the quantum-well lasers studied
Keywords :
electron device noise; frequency response; infrared sources; optical losses; semiconductor junction lasers; 1.5 micron; IR sources; MQW laser diodes; active region; damping; differential gain; gain suppression; internal losses; intrinsic frequency response; multiple quantum-well lasers; parasitic-free relative intensity noise; quantum well number; resonance frequency; Bandwidth; Damping; Frequency measurement; Frequency response; Laser theory; Noise measurement; Quantum well devices; Quantum well lasers; Resonance; Resonant frequency;
Journal_Title :
Quantum Electronics, IEEE Journal of
