Yutong Feng, C. Codemard, P. Barua, H. Lin, Sheng Zhu, Yujun Feng, S. Pidishety, Soonki Hong, J. Sahu, J. Nilsson
{"title":"Time Response Characteristics of Photodarkening-Induced Loss in Yb-Doped Fiber Amplifier","authors":"Yutong Feng, C. Codemard, P. Barua, H. Lin, Sheng Zhu, Yujun Feng, S. Pidishety, Soonki Hong, J. Sahu, J. Nilsson","doi":"10.1109/cleoe-eqec.2019.8872358","DOIUrl":null,"url":null,"abstract":"Photodarkening (PD) can degrade the output power and increase the thermal load in Yb-doped fiber lasers and amplifiers by increasing the propagation loss in the core [1,2]. PD can be attributed to color centers [3] and is reported to grow when the fiber is in use, over times from a few minutes to many hours (e.g., [2–4]). Typically, this is characterized in terms of a reduced output power of the operating device, but it is also possible to measure the transmission with non-resonant optical probes before, during, and after use. Although faster changes in the photodarkening are also possible [3], they have received little attention. Such fast changes can affect both the impact and the characterization of photodarkening.","PeriodicalId":6714,"journal":{"name":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","volume":"22 1","pages":"1-1"},"PeriodicalIF":0.0000,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/cleoe-eqec.2019.8872358","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
Photodarkening (PD) can degrade the output power and increase the thermal load in Yb-doped fiber lasers and amplifiers by increasing the propagation loss in the core [1,2]. PD can be attributed to color centers [3] and is reported to grow when the fiber is in use, over times from a few minutes to many hours (e.g., [2–4]). Typically, this is characterized in terms of a reduced output power of the operating device, but it is also possible to measure the transmission with non-resonant optical probes before, during, and after use. Although faster changes in the photodarkening are also possible [3], they have received little attention. Such fast changes can affect both the impact and the characterization of photodarkening.
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