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Proceedings Paper

True zero-order crystal wave-plate made of ADP crystal
Author(s): Hongkai Ren; Zhixin Wu; Zhengping Wang; Fang Wang; Fuquan Li; Xun Sun; Xinguang Xu
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Paper Abstract

This paper shows a novel design for a true zero-order wave-plate to introduce an accurate phase retardation with a big birefringent crystal. The true zero-order wave-plates can be processed with different angles deviating from the crystal’s axis, and the thickness could be selected from millimeter to centimeter order, which increased the mechanical strength greatly. The true zero-order wave-plates were made of NH4H2PO4 (ADP) crystal, including half wave-plate (HWP) and quarter wave-plate (QWP). When the cutting angle θ is 4o, the thickness d of 1064 nm TZ half wave plate (HWP) is 2.75 mm. At the room temperature (25°C), its extinction ratio as the polarization rotator reaches 1000:1 at 1064nm by using spectroscopic method. With ADP-QWP, a 18.6 ns pulse output of Q-switched Nd:YAG laser (1064nm) is successively realized. When the static energy is 160 mJ, the dynamic energy reaches 113 mJ. The above contents provide not only good references for wave-plates fabrication of other birefringent crystals, but also more potential applications in largediameter optical systems such as ultra-high power laser, high resolution inspection equipment and astronomical observation equipment with a large-diameter ADP wave-plate.

Paper Details

Date Published: 10 May 2019
PDF: 6 pages
Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110681P (10 May 2019); doi: 10.1117/12.2524588
Show Author Affiliations
Hongkai Ren, Shandong Univ. (China)
Zhixin Wu, Shandong Univ. (China)
Zhengping Wang, Shandong Univ. (China)
Fang Wang, Research Ctr. of Laser Fusion (China)
Fuquan Li, Research Ctr. of Laser Fusion (China)
Xun Sun, Shandong Univ. (China)
Xinguang Xu, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 11068:
Second Symposium on Novel Technology of X-Ray Imaging
Yangchao Tian; Tiqiao Xiao; Peng Liu, Editor(s)

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