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Proceedings Paper

A novel method for holographic femtosecond laser parallel processing using digital blazed grating and the divergent spherical wave
Author(s): Chaowei Wang; Yahui Su; Jinli Wang; Chenchu Zhang; Ziyu Zhang; Jiawen Li
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Paper Abstract

A novel method for holographic femtosecond laser parallel processing is proposed, which can suppress the interference of zero order light effectively and improve the energy utilization rate. In order to blaze the target pattern to the peak position of zero-order interference, a phase-only hologram containing digital blazed grating are designed and generated, The energy of the target pattern can be increased to 5.297 times in theory. In addition, by subsequently increasing the phase of divergent spherical wave, the focal plane of the target pattern and the plane of multi-order diffraction beam resulted from pixelated structure of the spatial light modulator (SLM) can be separated. Both the high pass filter and aperture are used to eliminate the influences of zero-order light and multi-order interferential patterns simultaneously. A system based on the phase-only SLM (with resolution of 1920*1080) is set up to validate the proposed method. The experimental results indicate that the proposed method can achieve high quality holographic femtosecond laser parallel processing with a significantly improved energy utilization rate.

Paper Details

Date Published: 18 August 2014
PDF: 6 pages
Proc. SPIE 9204, Interferometry XVII: Advanced Applications, 92040R (18 August 2014); doi: 10.1117/12.2060664
Show Author Affiliations
Chaowei Wang, Anhui Univ. (China)
Yahui Su, Anhui Univ. (China)
Jinli Wang, Anhui Univ. (China)
Chenchu Zhang, Univ. of Science and Technology of China (China)
Ziyu Zhang, Anhui Univ. (China)
Jiawen Li, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 9204:
Interferometry XVII: Advanced Applications
Cosme Furlong; Christophe Gorecki; Peter J. de Groot; Erik L. Novak, Editor(s)

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