{"title":"Modelling of gain profiles and Raman lasing in TiO2/GeO2-doped silica fibres","authors":"G. Felinskyi, V. I. Grygoruk, I. Serdeha","doi":"10.3116/16091833/21/1/15/2020","DOIUrl":null,"url":null,"abstract":". We analyze Raman lasing bandwidth for TiO 2 -doped single-mode fibre as a function of pumping power, following from modelling of the gain profile, and compare it with that typical for an etalon Raman (GeO 2 -doped) fibre. The both Raman gain profiles are quantified using the spontaneous Raman cross-sections derived with an original spectroscopic method. Extremely high accuracy of the multimode Gaussian decomposition is obtained for the Raman gain profiles. As a result, the Raman gain profiles can be presented in analytical form. A threshold spectral Raman profile is introduced and the lasing bands in the both single-mode fibres are simulated numerically. We discuss also the advantages of TiO 2 -doped fibres as the active media for fibre Raman lasing and compare their characteristics with those of the other fibre types.","PeriodicalId":23397,"journal":{"name":"Ukrainian Journal of Physical Optics","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ukrainian Journal of Physical Optics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.3116/16091833/21/1/15/2020","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 3
Abstract
. We analyze Raman lasing bandwidth for TiO 2 -doped single-mode fibre as a function of pumping power, following from modelling of the gain profile, and compare it with that typical for an etalon Raman (GeO 2 -doped) fibre. The both Raman gain profiles are quantified using the spontaneous Raman cross-sections derived with an original spectroscopic method. Extremely high accuracy of the multimode Gaussian decomposition is obtained for the Raman gain profiles. As a result, the Raman gain profiles can be presented in analytical form. A threshold spectral Raman profile is introduced and the lasing bands in the both single-mode fibres are simulated numerically. We discuss also the advantages of TiO 2 -doped fibres as the active media for fibre Raman lasing and compare their characteristics with those of the other fibre types.
期刊介绍：
“Ukrainian Journal of Physical Optics” contains original and review articles in the fields of crystal optics, piezo-, electro-, magneto- and acoustooptics, optical properties of solids and liquids in the course of phase transitions, nonlinear optics, holography, singular optics, laser physics, spectroscopy, biooptics, physical principles of operation of optoelectronic devices and systems, which need rapid publication.
The journal was founded in 2000 by the Institute of Physical Optics of the Ministry of Education and Science of Ukraine.
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