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Proceedings Paper

Transmitting volume Bragg gratings in PTR glass written with femtosecond Bessel beams
Author(s): G. H. Cheng; Y. J. Zhang; Q. Liu
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Paper Abstract

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 μm.

Paper Details

Date Published: 12 May 2017
PDF: 4 pages
Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 1017322 (12 May 2017); doi: 10.1117/12.2268292
Show Author Affiliations
G. H. Cheng, Xi'an Institute of Optics and Precision Mechanics (China)
Y. J. Zhang, Xi’an Institute of Optics and Precision Mechanics (China)
Q. Liu, Zhejiang Wanli Univ. (China)


Published in SPIE Proceedings Vol. 10173:
Fourth International Symposium on Laser Interaction with Matter
Yongkun Ding; Guobin Feng; Dieter H. H. Hoffmann; Jianlin Cao; Yongfeng Lu, Editor(s)

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