Gain measurements via spontaneous emission in quantum well semiconductor lasers
Date
Authors
Advisor
Instructor
Source Title
Print ISSN
Electronic ISSN
Publisher
Volume
Issue
Pages
Language
Type
Journal Title
Journal ISSN
Volume Title
Abstract
111 this work ail analysis of gain in single c|iianliini well last'rs as a riinction of sonu' of llu'ir o|)(M’alioiial paranu'l('rs is earrii'd oiil. I^'irsl, a 1 li('or('liea.l inodi'l of gain is |)resent('d. 'riuMi two diderent nudliods of gain iiK'asiir('in('nt, wliieli iis(' the spontaneous emission IVom the iaec't and the nnamplified s[)ontan('ons ('mission from the top of the ridg(', arc' discussed. Indirication procc'sses of lasers to racilitate tJie colh'clion of unampliiic'd spontaiK'ous ('mission are ch'tailed. R('S|)onse of the gain sp('ctrum to chang('s in inject('d cnrr('nt (h'lisity and temperature are measur('d and iinderstood in terms of hand Idling, hand gap renormalization and tenpx'rature d('pendenc(' of tlu' handgap. (!ain sainration above threshold is v('ri(ied and s|)atial variations in spontaiu'ons ('mission in lh(' longitiidnal and hiteral directions are observed.