Model and application of close-range coupling propagation of large aperture laser amplifiers

Yenan Zhang; Jiangfeng Wang; Xinghua Lu; Jiangtao Guo; Wei Fan; Xuechun Li

doi:10.1117/12.3015110

22 December 2023 Model and application of close-range coupling propagation of large aperture laser amplifiers

Yenan Zhang, Jiangfeng Wang, Xinghua Lu, Jiangtao Guo, Wei Fan, Xuechun Li

Proceedings Volume 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023); 129740H (2023) https://doi.org/10.1117/12.3015110
Event: Fifth International Symposium on High Power Laser Science and Engineering, 2023, Suzhou, China

Abstract

In order to accurately analyze and evaluate the output beam quality of large-aperture laser amplifiers, we established a new method of simulating thermal effects which can analyze the distributed thermal effects in the direction of optical transmission. In this method, gain medium would be divided to several segments. Thermal effects and beam propagation in every segment are calculated and cascaded to the next one in the direction of optical transmission until the end of gain medium rod. To achieve propagation of aperture-level distance in these segments, a close-range propagation algorithm based on angular spectrum is proposed and its correctness is verified by comparing with theoretical results obtained by Fresnel diffraction. Though this new method, simulations of the thermal effects in simplified amplifiers with two gain medium rods that compensate each other at different apertures were carried out. The results show that residuals of depolarization loss increase with aperture. When the diameter is up to 35mm, the maximum depolarization loss is 98.8%. This new method of simulating thermal effects lays a solid foundation for the further research on large-aperture highrepetition- rate laser systems.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yenan Zhang, Jiangfeng Wang, Xinghua Lu, Jiangtao Guo, Wei Fan, and Xuechun Li "Model and application of close-range coupling propagation of large aperture laser amplifiers", Proc. SPIE 12974, Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023), 129740H (22 December 2023); https://doi.org/10.1117/12.3015110

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Thermal effects

Optical transmission

Depolarization

Laser beam propagation

Wave propagation

Near field diffraction

Laser amplifiers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years