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Proceedings Paper

Diffraction gratings ablated on lithium niobate single crystal by femtosecond pulses
Author(s): Benhai Yu; Qingbin Tang
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Paper Abstract

The surface diffraction gratings on lithium niobate single crystal ablated by a femtosecond laser pulse at a wavelength of 800 nm have been investigated. The diffraction efficiencies of the gratings ablated with various parameters were measured by He-Ne laser at a wavelength of 632.8 nm. The 1-order diffraction efficiencies of the gratings improve from 1.7% to 2.3% with the increase of ablation speed from 20μm/s to 200μm/s, and decrease from 1.9% to 1.3% with the increase of pulse energy from 70nJ to 110nJ, respectively. The experimental and theoretical results show that the diffraction efficiencies of gratings can be improved by increase of ablation speed and grating constant or decrease of pulse energy.

Paper Details

Date Published: 18 February 2009
PDF: 7 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 727613 (18 February 2009); doi: 10.1117/12.821452
Show Author Affiliations
Benhai Yu, Xinyang Normal Univ. (China)
Huazhong Univ. of Science and Technology (China)
Qingbin Tang, Xinyang Normal Univ. (China)


Published in SPIE Proceedings Vol. 7276:
Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications
Peixiang Lu; Katsumi Midorikawa; Bernd Wilhelmi, Editor(s)

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