光学
激光器
硼硅酸盐玻璃
单色
材料科学
光圈(计算机存储器)
梁(结构)
数值孔径
望远镜
光功率
光电子学
物理
波长
声学
复合材料
作者
Emine Yasemen Kaya Cekin,Yavuz Ozturk,Eray Arpa,A. Yeniay
出处
期刊:Optical Engineering
[SPIE - International Society for Optical Engineering]
日期:2021-06-10
卷期号:60 (06)
被引量:1
标识
DOI:10.1117/1.oe.60.6.065102
摘要
We present a full-scale numerical study of thermally induced optical aberrations on the primary mirror of a beam director telescope. In particular, we investigate high-power laser-induced deformations, resulting monochromatic aberrations, and their effects on imaging and laser focusing performance of primary telescope mirrors in shared aperture beam director systems. As a practical example, we consider a system based on 6 × 4 kW single-mode high-power laser sources and a primary mirror having a 500 mm circular clear aperture. A detailed comparison of the monochromatic aberrations and their implications on the optical performance is provided for borosilicate and Zerodur® substrates having identical reflective coatings for potential laser beam director applications. Our analyses show that high-power lasers can be efficiently directed with negligible imaging degradation using athermal substrates (i.e., Zerodur®) with high reflective coatings (>99.9 % ) for primary mirrors. On the other hand, substrates with a relatively higher coefficient of thermal expansion (i.e., borosilicate) can only be used effectively under a strictly controlled ambient temperature.
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