Method to mosaic gratings that relies on analysis of far-field intensity patterns in two wavelengths

被引:35
作者
Hu, Yao [1 ]
Zeng, Lijiang [1 ]
Li, Lifeng [1 ]
机构
[1] Tsing Hua Univ, Dept Precis Instruments, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
diffraction grating; tiled gratings; grating compressor; far-field diffraction pattern; chirped-pulse amplification;
D O I
10.1016/j.optcom.2006.08.008
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose an experimental method to coherently mosaic two planar diffraction gratings. The method uses a Twyman-Green interferometer to guarantee the planar parallelism of the two sub-aperture gratings, and obtains the in-plane rotational error and the two translational errors from analysis of the far-field diffraction intensity patterns in two alignment wavelengths. We adjust the relative attitude and position of the two sub-aperture gratings to produce Airy disk diffraction patterns in both wavelengths. In our experiment, the repeatability of in-plane rotation adjustment was 2.35 mu rad and that of longitudinal adjustment was 0.11 mu m. The accuracy of lateral adjustment was about 2.9% of the grating period. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:285 / 290
页数:6
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