Wavefront testing of large-aperture continuous phase plate

被引：3

作者：

Chai L. ^{[1
]}

Yu Y. ^{[2
]}

Shi Q. ^{[1
]}

Xu Q. ^{[1
]}

Wen S. ^{[1
]}

Hou J. ^{[1
]}

机构：

[1] Fine Optical Engineering Research Center, Chengdu

[2] School of Mechatronics Engineering and Automation, Shanghai University

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 03期

关键词：

Continuous phase plate; Measurement; Sub-aperture stitching; Wavefront with large phase gradient testing;

D O I：

10.3788/CJL20103703.0809

中图分类号：

学科分类号：

摘要：

Continuous phase plate(CPP) is critical diffractive optical element used for beam shaping in high-power laser system. But the large-aperture interferometer is unsuitable for testing it for its spatial period with several millimeters and the large phase gradient. A sub-aperture stitching method by small-aperture and high lateral-resolution interferometer is proposed to realize wavefront testing of CPP. A novel interpolation algorithm is developed for circular aperture and the equipment is set up. It tests a CPP with size of 330 mm×330 mm. The experimental result shows that the maximum testable slope of this CPP reaches 3 μm/cm with millimeter period, while the testing repeatability is 6 nm(root mean square). The simulated spot diagram result of far field based on tested wavefront is in good agreement with tested result in high-power laser system.

引用

页码：809 / 814

页数：5

共 14 条

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