The light modulation of scratches on the surface of fused silica glass

Hongyu Wang; Sunlin Xiang; Baoxing Xiong; Fan Gao; Xiang Zhang; Xiao Yuan

doi:10.1117/12.2587365

2 December 2020 The light modulation of scratches on the surface of fused silica glass

Hongyu Wang, Sunlin Xiang, Baoxing Xiong, Fan Gao, Xiang Zhang, Xiao Yuan

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 117172R (2020) https://doi.org/10.1117/12.2587365
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

Surface defects of fused silica glass have become the main reason that limits the resistance of fused silica components to laser damage. When the laser enters the scratch, the scratch modulates the incident light field to increase the local light intensity, increase the probability of damage to the optical element, and reduce the damage threshold. In order to study the modulation effect of scratches on the light field, this paper considers radial triangular scratches and uses the finite difference time domain (FDTD) method to establish a laser incident triangular scratch model. As a result, with the increase of the scratch width w, the maximum light intensity enhancement factor (LIEF) on the front surface of the scratch is 4.6, and the maximum LIEF on the rear surface can reach 9.2. With the increase of the scratch depth d, the LIEF on the front surface of the scratch is 7.5, and the maximum LIEF on the rear surface can reach 12.2. When the scratch is located on the rear surface, the incident laser occurs totally reflection, the interference effect is obvious, the LIEF becomes larger, and the rear surface is more prone to damage.

Citation Download Citation

Hongyu Wang, Sunlin Xiang, Baoxing Xiong, Fan Gao, Xiang Zhang, and Xiao Yuan "The light modulation of scratches on the surface of fused silica glass", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 117172R (2 December 2020); https://doi.org/10.1117/12.2587365

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