Volumetric modifications in fused silica using Gaussian and Bessel femtosecond laser beams
Volumetric modifications in fused silica using Gaussian and Bessel femtosecond laser beams
复制标题
使用高斯和贝塞尔飞秒激光束对熔融石英进行体积改性
DOI：
10.1117/12.2020258
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Juodkazis
中科院分区：
文献类型：
--
作者：
D. Paipulas;M. Mikutis;V. Sirutkaitis;S. Juodkazis
在这项工作中，我们介绍了利用飞秒高斯和高斯-贝塞尔激光对熔融二氧化硅进行体积修饰的结果。我们发现，对于特定的光子器件，如体积布拉格光栅，贝塞尔光束的制作比高斯光束更优越，因为记录过程更快，制作的器件具有更好的效率。此外，高斯光束在形成纳米级时往往更有效，这会导致修改区出现双折射。这降低了所制造器件的光学质量并限制了总体记录速度。我们利用飞秒高斯-贝塞尔光束在熔融二氧化硅中成功地制作了绝对衍射效率达到∼90%的体布拉格光栅，而用高斯光束制作的体布拉格光栅只有60%。
In this work we present the results on volumetric fused silica modifications using femtosecond Gaussian and Gaussian-Bessel laser beams. We show that for specific photonic device, like volume Bragg grating, fabrication, Bessel beams are more superior to Gaussian, as the recording process is much faster and fabricated devices have better efficiencies. Also Gaussian beam tend to be more efficient in formation of nanogratings that causes the appearance of birefringence in modified zones. This reduces optical quality of fabricated device and limits overall recording velocity. We have successfully fabricated volume Bragg gratings in the bulk of fused silica that had absolute diffraction efficiencies reaching ∼90% using femtosecond Gaussian-Bessel beam, while gratings made with Gaussian beam reached only 60%.
影响因子：
8.6
作者：
Shimotsuma, Y;Kazansky, PG;Hirao, K
通讯作者：
Hirao, K