Error analysis of holographic mosaic gratings
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1.
Institute of Information Optical Engineering, Soochow University, Suzhou 215006, China;
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2.
School of Electronic and Information Engineering, Suzhou Vocational University, Suzhou 215104, China
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Corresponding author:
WU Jian-hong, jhwu@suda.edu.cn
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Received Date:
2013-04-08
Accepted Date:
2013-05-17
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Abstract
In order to make large scale gratings,errors of holographic mosaic gratings were analyzed. The gratings' phase and rotation were designed by monitoring the Moiré fringes formed on the reference grating. The orientation and period of the Moiré fringes can show the grating's rotation condition, and the phase can express the grating's phase condition. The phase congruence of the Moiré fringes and the mosaic gratings is researched when the planes of reference grating and the mosaic grating's substrate are not parallel. In addition mosaic gratings' phase error brought by the drift of optical path difference was studied. The errors of mosaic gratings caused by the movement of workbench were analyzed. Considering all of the factors, the mosaic gratings' error is about 0.15λ.The value can meet the requirement of mosaic grating which is designed to be used for pulse compressor. Finally the precision of mosaic gratings' error was confirmed by the experiment. The results show that it is feasible to make the holographic mosaic grating by using the reference grating. The research of holographic mosaic gratings' error provides the method for making meter-order gratings.
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