Mr. Wangqi Xue Profile

Wangqi Xue

at Northwest Institute of Nuclear Technology

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 22 December 2022 Paper

Effect of laser beam diameter on near infrared laser damage threshold of Ge optical materials

Wangqi Xue, Jianmin Zhang, Yubin Shi, Zuodong Xu, Yunpeng Li, Pengcheng Dou, Guobin Feng

Proceedings Volume 12459, 124590I (2022) https://doi.org/10.1117/12.2656513

KEYWORDS: Laser damage threshold, Germanium, Optical components, Near infrared, Optical design, Laser irradiation, Optical simulations, Safety, Laser induced damage

Read Abstract +

Germanium is widely used as lens or windows in infrared optical systems, however, germanium optical elements may be damaged by melting under high energy laser irradiation. Therefore, it is necessary to carry out theoretical and experiment research on laser damage threshold of the germanium optical material. In this paper, the effect of laser beam diameter on the damage threshold of germanium was analyzed by numerical calculation. Besides, the difference of damage threshold represented using line power density and area power density was compared. It was found that when the diameter ratio of beam spot to sample was 0.02 to 0.09, the damage threshold decreased by 27.9% and 85.6%, respectively, when using W/cm and W/cm2 as the unit correspondingly. Considering the difference between the size of the beam and the element in optical system, the line power density is more suitable for extrapolation and comparison. In addition, the numerical results were verified by damage threshold experiment under the continuous laser of 1080 nm, which indicates the damage threshold of germanium is 263W/cm, 280W/cm and 290W/cm respectively, and the beam diameter is 0.5mm, 1mm and 2mm correspondingly. It was found that when the diameter ratio of beam spot to sample was 0.021 to 0.083, the damage threshold increased by 10.3% and decreased by 85.6%, respectively, when using W/cm and W/cm2 as the unit correspondingly. These results provide data support for the design and application of germanium optical elements to ensure the reliability of the high energy laser system.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years