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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >H-Bearing species migration during UV writing of Bragg gratings in germanosilicate optical fibers
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H-Bearing species migration during UV writing of Bragg gratings in germanosilicate optical fibers

机译：锗酸盐硅酸盐光纤中布拉格光栅紫外写入过程中含H的物种迁移

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摘要

Bragg gratings (BG) have been written in H-2-loaded Ge-doped preform plates by means of CW 244 nm-laser light. H-bearing absorbance profiles have been performed along the BG longitudinal axis by means of FTIR absorption micro-spectroscopy. It has been observed that the higher the UV writing time or power, the higher the OH species average concentration but the lower the OH species modulation amplitude along the Bragg gratings axis. It is suggested that OH species migrates from the bright UV fringes towards the dark ones during BG writing. Thus, these diffusing species contribute mainly to the mean index and not to the modulation index. (c) 2007 Elsevier B.V. All rights reserved.
机译：借助于CW 244 nm激光，已在加载H-2的掺Ge的预制棒中写入了布拉格光栅（BG）。借助FTIR吸收光谱法已沿着BG纵轴进行了含H的吸光度分布图。已经观察到，UV写入时间或功率越高，OH种类平均浓度越高，但是沿着布拉格光栅轴的OH种类调制幅度越低。建议在BG写入过程中OH物种从明亮的UV条纹迁移到黑暗的UV条纹。因此，这些扩散物质主要有助于平均指数而不是调制指数。 （c）2007 Elsevier B.V.保留所有权利。

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