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飞秒激光写入熔融石英中I型波导内嵌的索引调制

Index Modulation Embedded in Type I Waveguide Written by Femtosecond Laser in Fused Silica.

作者信息

Lv Jing, Stoian Razvan, Cheng Guanghua, Wang Kedian

机构信息

School of Artificial Intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an 710072, China.

Laboratoire Hubert Curien, UMR 5516 CNRS, Université de Lyon, Université Jean Monnet, 42000 Saint Etienne, France.

出版信息

Micromachines (Basel). 2021 Dec 18;12(12):1579. doi: 10.3390/mi12121579.

DOI:10.3390/mi12121579
PMID:34945429
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8708681/
Abstract

Slit-shaped laser beams focused in bulk optical materials can realize embedded waveguides with circular cross sections consisting of positive index change type I traces. In these kinds of waveguide traces, a peculiar periodical refractive index modulation was observed in type I waveguides with two different femtosecond lasers. The direction of refractive index modulation can be controlled with the slit configuration, and its period can be controlled by mechanical perturbation of the stages and the scanning speed. We argue that platform perturbation and dynamical thermal transport processes during the scan are generating factors in the appearance of this modulation. The embedded microstructures in waveguides can provide spectrum modulation, which may have potential applications in optical sensing, filtering, and phase control.

摘要

聚焦于块状光学材料中的狭缝形激光束能够实现具有圆形横截面的嵌入式波导，该波导由正折射率变化的I型轨迹组成。在这类波导轨迹中，使用两种不同的飞秒激光在I型波导中观察到了一种特殊的周期性折射率调制。折射率调制的方向可以通过狭缝配置来控制，其周期可以通过平台的机械扰动和扫描速度来控制。我们认为扫描过程中的平台扰动和动态热传输过程是这种调制出现的产生因素。波导中的嵌入式微结构可以提供光谱调制，这可能在光学传感、滤波和相位控制方面具有潜在应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/95229b74e6b2/micromachines-12-01579-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/bf7366bbf6aa/micromachines-12-01579-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/8a4850f4b435/micromachines-12-01579-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/9c2635b4ad5b/micromachines-12-01579-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/c7ac9a037c82/micromachines-12-01579-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/3afbd0128f2e/micromachines-12-01579-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/e12fd7affdc9/micromachines-12-01579-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/ad29713fac8c/micromachines-12-01579-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/95229b74e6b2/micromachines-12-01579-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/bf7366bbf6aa/micromachines-12-01579-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/8a4850f4b435/micromachines-12-01579-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/9c2635b4ad5b/micromachines-12-01579-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/c7ac9a037c82/micromachines-12-01579-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/3afbd0128f2e/micromachines-12-01579-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/e12fd7affdc9/micromachines-12-01579-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/ad29713fac8c/micromachines-12-01579-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/26ab/8708681/95229b74e6b2/micromachines-12-01579-g008.jpg

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本文引用的文献

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Polarization-dependent microstructural evolution induced by a femtosecond laser in an aluminosilicate glass.飞秒激光诱导铝硅酸盐玻璃中偏振相关的微观结构演变
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基于飞秒脉冲序列控制电子动力学的熔石英偏振无关蚀刻用于微通道制造
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