均匀紫外辐照诱导光-热折射玻璃的周期结构

Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals Pub Date : 1900-01-01 DOI:10.1364/bgppf.1997.jsue.15

L. Glebov, V. Smirnov

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引用次数: 0

摘要

将光-热折射玻璃样品暴露在325 nm的He-Cd激光的均匀准直光束下。由于光致结晶，在热显影时观察到暴露玻璃的折射率变化。光学显微镜观察到在暴露区域内有周期性结构。这种结构是一种平行连续排列的细丝系统，其宽度为十微米，沿光传播方向定向。入射光偏振方向的变化不影响所得结构。

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Periodic structures in photo-thermo-refractive glasses induced by homogeneous UV irradiation

Samples of photo-thermo-refractive glasses were exposed to a homogeneous collimated beam of a He-Cd laser at 325 nm. A refractive index change is observed in the exposed glass upon thermodevelopment due to photoinduced crystallization. A periodic structure was observed inside this exposed area by optical microscopy. This structure is a system of parallel continuous aligned filaments having widths of ten's of microns oriented along the direction of light propagation. Variation of incident light polarization direction does not effect the resulting structure.

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Bragg Gratings, Photosensitivity, and Poling in Glass Fibers and Waveguides: Applications and Fundamentals

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