Near field angular filtering with volume Bragg gratings in photothermorefractive glass

Xiang Zhang; Fan Gao; Jiansheng Feng; Kuaisheng Zou; Xiao Yuan

doi:10.1117/12.2040109

25 February 2014 Near field angular filtering with volume Bragg gratings in photothermorefractive glass

Xiang Zhang, Fan Gao, Jiansheng Feng, Kuaisheng Zou, Xiao Yuan

Proceedings Volume 8962, High Energy/Average Power Lasers and Intense Beam Applications VII; 89620L (2014) https://doi.org/10.1117/12.2040109
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Angular filtering with volume Bragg gratings in photothermorefractive glass was described. The coupled-wave theory was used to discuss the angular filtering based on Transmission Volume Bragg Gratings (TBGs). The results showed that the cutoff frequency was improved, the refractive index modulation had a greater impact on the output beam and the deviation from Bragg condition for incident beam should be less than 0.1mrad. The influence on output beam quality with TBGs parameters was analyzed. Experimental results showed that the near-field distribution of output beam through the angular filtering is better than that of the incident laser beam, and the low-frequency loss of near-field angular filtering is less than 1.8%.

Citation Download Citation

Xiang Zhang, Fan Gao, Jiansheng Feng, Kuaisheng Zou, and Xiao Yuan "Near field angular filtering with volume Bragg gratings in photothermorefractive glass", Proc. SPIE 8962, High Energy/Average Power Lasers and Intense Beam Applications VII, 89620L (25 February 2014); https://doi.org/10.1117/12.2040109

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