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首页> 外文期刊>Optics Letters >Thermal poling of femtosecond laser-written waveguides in fused silica
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Thermal poling of femtosecond laser-written waveguides in fused silica

机译：飞秒激光写入波导在熔融石英中的热极化

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摘要

Thermal poling of femtosecond laser written waveguides was investigated using second-harmonic microscopy under three approaches: (1) pre-poling and (2) post-poling in which fused silica substrates were poled before or after waveguide formation, respectively, and (3) double poling in which poling was applied both before and after laser writing. Effective nonlinear waveguide interaction strength was assessed relative to the mode profile and the assessments demonstrated an erasure effect of 81% in pre-poling and an ion migration blocking effect of 26% in post-poling. Double poling was found to recover the nonlinearity over the modal zone, overcoming prior difficulties with combining laser processing and thermal poling, opening up a future avenue for creating active devices through femtosecond laser writing of nonlinear optical circuits in fused silica. (C) 2016 Optical Society of America
机译：使用二次谐波显微镜通过以下三种方法研究了飞秒激光写入波导的热极化：（1）预极化和（2）后极化，其中在波导形成之前或之后分别极化熔融石英衬底，以及（3）双重极化，在激光写入之前和之后均进行极化。相对于模式轮廓，评估了有效的非线性波导相互作用强度，评估结果表明，前极化的擦除效果为81％，后极化的离子迁移阻挡效果为26％。发现双极化可以恢复模态区域的非线性，克服了先前将激光加工和热极化相结合的难题，为飞秒激光写入熔融石英中的非线性光学电路开辟了创建有源器件的未来途径。 （C）2016美国眼镜学会

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