Design of high efficiency, broad bandwidth unpolarized transmission grating for femtosecond  laser

Xin Rong Chen; Chao Ming Li; Jian Hong Wu

doi:10.1117/12.2245821

9 November 2016 Design of high efficiency, broad bandwidth unpolarized transmission grating for femtosecond laser

Xin Rong Chen, Chao Ming Li, Jian Hong Wu

Proceedings Volume 10016, High-Power Lasers and Applications VIII; 100161K (2016) https://doi.org/10.1117/12.2245821
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

An unpolarized fused silica transmission grating with 1250lp/mm applying in femtosecond laser has been designed at 780nm center wavelength with 740nm~840nm bandwidth. By using the rigorous coupled-wave theory, computer optimization shows that: when the groove depth and duty cycle are about 1.51um~1.63um, 0.53~0.63 respectively, the first-order diffraction efficiency of a lossless-transmission surface-relief grating with a rectangular surface profile can reach to higher than 90% for total unpolarized wave under 28.2°±4°incident angle.

Citation Download Citation

Xin Rong Chen, Chao Ming Li, and Jian Hong Wu "Design of high efficiency, broad bandwidth unpolarized transmission grating for femtosecond laser", Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100161K (9 November 2016); https://doi.org/10.1117/12.2245821

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