12 May 2017 Transmitting volume Bragg gratings in PTR glass written with femtosecond Bessel beams
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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.
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G. H. Cheng, Y. J. Zhang, 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); doi: 10.1117/12.2268292; https://doi.org/10.1117/12.2268292
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