Transmitting volume Bragg Gratings in PTR glass written with femtosecond Bessel beams

被引：2
|
作者：
Cheng, G. H. [1 ]
Zhang, Y. J. [1 ]
Liu, Q. [2 ]
机构：
[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China
[2] Zhejiang Wanli Univ, Ningbo 315100, Zhejiang, Peoples R China
来源：
FOURTH INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER | 2017年 / 10173卷
关键词：
PTR glass; Laser-matter interactions; Nonlinear photosensitivity; Volume Bragg gratings; Diffraction efficiency; THERMO-REFRACTIVE GLASS; WAVE-GUIDE LASERS;
D O I：
10.1117/12.2268292
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Transmitting volume Bragg gratings were fabricated in photo-thermo-refractive glass using femtosecond laser Bessel beams and thermal treatment. The phase contrast images of gratings under different writing power were investigated before and after annealing. Microstructures composed of nano-sized crystals were observed in the exposed regions. Optimized writing power (100 mW) achieved dense nano-crystals distribution. A maximum diffraction efficiency of 92.36% was achieved with 1 mm grating thickness at period of 5 mu m.
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页数：4
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