{"title":"Theory on Distributed Feedback (DFB) Lasers with Strong Periodic Modulations","authors":"S. Gnepf, H. Preiswerk, F. Kneubühl","doi":"10.1109/ICSWA.1981.9335213","DOIUrl":null,"url":null,"abstract":"DFB (Distributed Feedback) lasers do not use conventional resonator mirrors, but provide feedback via backward Bragg scattering from periodic modulations of refractive index and/or gain of the iaser medium. An important feature is the high spectral selectivity which originates in the Bragg effect and allows selection of longitudinal modes |l|. Hitherto, DFB theories were restricted to small modulations |2,3,4,5|. In this paper, we study the effects of strong DFB modulations on the basis of a complex Hill equation which can be solved analytically. This procedure provides for the first time a direct access to the complex characteristics of future DFB lasers with strong modulations.","PeriodicalId":254777,"journal":{"name":"1981 International Conference on Submillimeter Waves and Their Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1981-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1981 International Conference on Submillimeter Waves and Their Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICSWA.1981.9335213","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
DFB (Distributed Feedback) lasers do not use conventional resonator mirrors, but provide feedback via backward Bragg scattering from periodic modulations of refractive index and/or gain of the iaser medium. An important feature is the high spectral selectivity which originates in the Bragg effect and allows selection of longitudinal modes |l|. Hitherto, DFB theories were restricted to small modulations |2,3,4,5|. In this paper, we study the effects of strong DFB modulations on the basis of a complex Hill equation which can be solved analytically. This procedure provides for the first time a direct access to the complex characteristics of future DFB lasers with strong modulations.
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