Refractive index modulation in photo-thermo-refractive fibers

被引：5
|
作者：
Rotari, E [1 ]
Glebova, L [1 ]
Glebov, L [1 ]
机构：
[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA
来源：
FIBER LASERS II: TECHNOLOGY, SYSTEMS, AND APPLICATIONS | 2005年 / 5709卷
关键词：
photo-thermo-refractive glass; fiber Bragg gratings; structural transformations;
D O I：
10.1117/12.591217
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Refractive index decrement was discovered in a fiber made from photo-thermo-refractive (PTR) glass. PTR glass is a fluorosilicate glass doped with cerium and silver which demonstrates refractive index change after UV exposure and thermal development due to precipitation of NaF nanocrystals in the irradiated areas. This glass is widely used for volume holographic optical elements recording. Photosensitivity in PTR optical fibers has been shown after exposure to radiation at 325 nm for about 1 J/cm(2) followed by thermal development at 520 degrees C. Refractive index difference between exposed and unexposed areas was about 1000 ppm. A Bragg mirror at 1088 nm was recorded in such fiber which showed narrow band reflection within 1 nm.
引用
收藏
页码：379 / 384
页数：6
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