Mr. Kevin Li Profile

Kevin Li

at Corning Incorporated

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 | 5 March 2021 Presentation + Paper

Thermal lensing mitigation for high power laser processing

Anping Liu, Kefeng Li

Proceedings Volume 11679, 116790L (2021) https://doi.org/10.1117/12.2578360

KEYWORDS: Objectives, High power lasers, Silica, Lenses, Lens design, Optical components, Diffraction, Thermal effects, Distortion, Temperature metrology

Read Abstract +

We have developed an optical model capable of designing and evaluating lenses for high power lasers. The model is used to design two types of optical lenses suited for high power laser applications. A three element objective lens with a focal length of 150mm and NA of 0.2 is capable of achieving diffraction limited performance. However, the performance is greatly compromised when conventional fused silica is used. Both the spot size and waist location are too sensitive to lens temperature variation. To overcome the issue, an athermal lens with both fused silica and CaF₂ elements can perform well over a wide range of temperature variation from 20 °C to 300 °C. Similarly, a f-theta lens with a focal length of 200mm, scanning angle of ±18° is designed. Both thermal lensing caused by material as well as environment temperature are analyzed. Overall, the f-theta lens is not as sensitive as the objective due to its small NA. Nevertheless, thermal lensing can still affect the process and needs to be addressed. With a similar approach, an athermal f-theta lens with a combination of fused silica and CaF₂ elements can perform well over a wide range of temperature variation from 20 °C to 300 °C.

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