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http://dx.doi.org/10.4191/KCERS.2002.39.12.1158

Fabrication and Characterization of Ge/B-doped Optical Fiber for UV Poling Applications  

Kim, Bok-Hyeon (Department of Information and Communications, Kwangju Institute of Science and Technology)
Ahn, Tae-Jun (Department of Information and Communications, Kwangju Institute of Science and Technology)
Heo, Jong (Department of Materials Science and Engineering, Pohang University of Science and Technology)
Shin, Dong-Wook (Department of Ceramic Engineering, Hanyang University)
Han, Won-Taek (Department of Information and Communications, Kwangju Institute of Science and Technology)
Publication Information
Abstract
An Ge/B-doped optical fiber with high photosensitivity was fabricated to induce large second-order optical nonlinearity by UV poling. It was found that long period fiber gratings were inscribed on the fiber by the 248 nm KrF excimer laser irradiation with pulse energy of 116 mJ/$cm^2$ and pulse frequency of 10 Hz without hydrogen loading treatment. The photosensitivity was measured by use of the long period fiber grating pair method and the refractive index change of 3.3$10{\times}^{-3}$ was found to be induced in the core of the optical fiber by the KrF excimer laser irradiation of 8.67 kJ/$cm^2$. An H-shaped optical fiber was also fabricated for the UV poling through optimization of the fiber drawing condition.
Keywords
Second-order optical nonlinearity; UV poling; Photosensitivity; Optical fiber; Long period fiber grating; Laser;
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