{"title":"近紫外光在光纤中制备布拉格光栅","authors":"D. Starodubov, V. Grubsky, J. Feinberg","doi":"10.1364/bgppf.1997.bme.1","DOIUrl":null,"url":null,"abstract":"The photosensitivity of germanosilicate fibers has been tied to the presence of germanium oxygen-deficient defects (GODC) [1,2]. These defects are identified by a strong absorption peak at 240 nm and a weaker absorption peak at 330 nm (Fig. 1) [3]. The microscopic model of these defects is still debated [4-7]; however, the three-level model of the defect shown in Fig. 2 nicely explains the defect’s main spectroscopic features [4]. It was thought that color center formation due to photoionization of defects by 240 nm light was the principal mechanism of index change (through the Kramers-Kronig relation) [8]. However recent tension measurements and observations of glass densification after UV exposure suggest that a structural transformation of the glass occurs [9,10].","PeriodicalId":182420,"journal":{"name":"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals","volume":"45 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Bragg Grating Fabrication in Fibers by Near-UV Light\",\"authors\":\"D. Starodubov, V. Grubsky, J. Feinberg\",\"doi\":\"10.1364/bgppf.1997.bme.1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The photosensitivity of germanosilicate fibers has been tied to the presence of germanium oxygen-deficient defects (GODC) [1,2]. These defects are identified by a strong absorption peak at 240 nm and a weaker absorption peak at 330 nm (Fig. 1) [3]. The microscopic model of these defects is still debated [4-7]; however, the three-level model of the defect shown in Fig. 2 nicely explains the defect’s main spectroscopic features [4]. It was thought that color center formation due to photoionization of defects by 240 nm light was the principal mechanism of index change (through the Kramers-Kronig relation) [8]. However recent tension measurements and observations of glass densification after UV exposure suggest that a structural transformation of the glass occurs [9,10].\",\"PeriodicalId\":182420,\"journal\":{\"name\":\"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals\",\"volume\":\"45 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1364/bgppf.1997.bme.1\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/bgppf.1997.bme.1","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Bragg Grating Fabrication in Fibers by Near-UV Light
The photosensitivity of germanosilicate fibers has been tied to the presence of germanium oxygen-deficient defects (GODC) [1,2]. These defects are identified by a strong absorption peak at 240 nm and a weaker absorption peak at 330 nm (Fig. 1) [3]. The microscopic model of these defects is still debated [4-7]; however, the three-level model of the defect shown in Fig. 2 nicely explains the defect’s main spectroscopic features [4]. It was thought that color center formation due to photoionization of defects by 240 nm light was the principal mechanism of index change (through the Kramers-Kronig relation) [8]. However recent tension measurements and observations of glass densification after UV exposure suggest that a structural transformation of the glass occurs [9,10].