{"title":"Surface-emitting, single-lobe operation from 2nd-order DFB/DBR lasers with central grating phaseshift","authors":"G. Witjaksono, D. Botez","doi":"10.1109/ISLC.2000.882275","DOIUrl":null,"url":null,"abstract":"Here we present a composite DFB/DBR device, which fundamentally favors lasing in the symmetric mode over a wide range in central-phaseshift value. External differential quantum efficiencies in excess of 50% are obtained, and the guided-field profile is substantially uniform. A double-quantum-well InGaAs-InGaAsP active region with InGaP cladding layers, and a grating formed in the p+-GaAs cap layer. A GaAs-Au grating provides both high coupling coefficient, K, as well as insures that all first-order diffracted light is collected.","PeriodicalId":322366,"journal":{"name":"Conference Digest. 2000 IEEE 17th International Semiconductor Laser Conference. (Cat. No.00CH37092)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2000-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Digest. 2000 IEEE 17th International Semiconductor Laser Conference. (Cat. No.00CH37092)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISLC.2000.882275","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Here we present a composite DFB/DBR device, which fundamentally favors lasing in the symmetric mode over a wide range in central-phaseshift value. External differential quantum efficiencies in excess of 50% are obtained, and the guided-field profile is substantially uniform. A double-quantum-well InGaAs-InGaAsP active region with InGaP cladding layers, and a grating formed in the p+-GaAs cap layer. A GaAs-Au grating provides both high coupling coefficient, K, as well as insures that all first-order diffracted light is collected.
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