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

G. H. Cheng; Y. J. Zhang; Q. Liu

doi:10.1117/12.2268292

12 May 2017 Transmitting volume Bragg gratings in PTR glass written with femtosecond Bessel beams

G. H. Cheng, Y. J. Zhang, Q. Liu

Proceedings Volume 10173, Fourth International Symposium on Laser Interaction with Matter; 1017322 (2017) https://doi.org/10.1117/12.2268292
Event: 4th International Symposium on Laser Interaction with Matter, 2016, Chengdu, China

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.

Citation Download Citation

G. H. Cheng, Y. J. Zhang, and Q. Liu "Transmitting volume Bragg gratings in PTR glass written with femtosecond Bessel beams", Proc. SPIE 10173, Fourth International Symposium on Laser Interaction with Matter, 1017322 (12 May 2017); https://doi.org/10.1117/12.2268292

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