10 June 2021 High-power laser-induced optical aberrations on beam director mirrors
Emine Yasemen Kaya Cekin, Yavuz Ozturk, Eray Arpa, Aydin Yeniay
Author Affiliations +
Abstract

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.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2021/$28.00 © 2021 SPIE
Emine Yasemen Kaya Cekin, Yavuz Ozturk, Eray Arpa, and Aydin Yeniay "High-power laser-induced optical aberrations on beam director mirrors," Optical Engineering 60(6), 065102 (10 June 2021). https://doi.org/10.1117/1.OE.60.6.065102
Received: 16 March 2021; Accepted: 24 May 2021; Published: 10 June 2021
Lens.org Logo
CITATIONS
Cited by 1 scholarly publication and 2 patents.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Mirrors

High power lasers

Zerodur

Monochromatic aberrations

Optical aberrations

Laser optics

Optical coatings

Back to Top