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首页> 外文期刊>Optics Letters >Behavior of femtosecond laser-induced eccentric fiber Bragg gratings at very high temperatures
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Behavior of femtosecond laser-induced eccentric fiber Bragg gratings at very high temperatures

机译：飞秒激光诱导的偏心光纤布拉格光栅在高温下的行为

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摘要

In this work, eccentric Bragg gratings are photoinscribed in telecommunication-grade optical fibers. They are localized close to the core-cladding interface, yielding strong cladding mode resonance couplings and high photoinduced birefringence. Their transmitted amplitude spectrum is measured with polarized light while they are exposed to temperature changes up to 900 degrees C. Despite the gratings' overall good thermal stability that confirms their robustness for high-temperature refractometry, we report an interesting polarization effect depending on both the cladding mode resonance family and mode order. While the core mode birefringence decreases with growing temperatures, certain cladding mode resonances show an increase in wavelength splitting between their orthogonally polarized components. This differential behavior is of high interest in developing high-resolution, multiparametric sensing platforms. (C) 2016 Optical Society of America
机译：在这项工作中，偏心布拉格光栅被光刻在电信级光纤中。它们位于芯-包层界面附近，产生强包层模式共振耦合和高光致双折射。当它们暴露于高达900摄氏度的温度变化时，它们的透射振幅谱是用偏振光测量的。尽管光栅总体上具有良好的热稳定性，这证实了它们在高温折射仪中的坚固性，但我们还是报道了一种有趣的偏振效应，具体取决于两者包层模式谐振族和模式顺序。虽然纤芯模式双折射会随着温度的升高而降低，但某些包层模式谐振会显示出其正交偏振分量之间的波长分裂增加。这种差异行为在开发高分辨率，多参数感测平台方面引起了人们的极大兴趣。 （C）2016美国眼镜学会

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