Photothermal absorption measurements for improved thermal stability of high-power laser optics

M. Stubenvoll; B. Schäfer; K. Mann; A. Walter; L. Zittel

doi:10.1117/12.2031705

15 November 2013 Photothermal absorption measurements for improved thermal stability of high-power laser optics

M. Stubenvoll, B. Schäfer, K. Mann, A. Walter, L. Zittel

Proceedings Volume 8885, Laser-Induced Damage in Optical Materials: 2013; 88851R (2013) https://doi.org/10.1117/12.2031705
Event: SPIE Laser Damage, 2013, Boulder, Colorado, United States

Abstract

An absorption measurement system was set up deploying a Hartmann-Shack wavefront sensor with extreme sensitivity to accomplish spatially resolved monitoring of thermally induced wavefront distortions. Photothermal absorption measurements in the near-infrared range were performed for both the characterization of optical materials and complete F-Theta lenses, utilizing a 500 W Yb fiber laser (λ = 1070 nm) to induce thermal load. Different combinations of bulk materials and AR coatings were examined to minimize absorption and to evaluate potential approaches for thermal compensation. Additionally, bulk and surface / coating absorption coefficients were determined by means of curve-fitting procedures. Furthermore, F-Theta lenses were tested to gain understanding of the thermal behavior of the entire optical system.

Citation Download Citation

M. Stubenvoll, B. Schäfer, K. Mann, A. Walter, and L. Zittel "Photothermal absorption measurements for improved thermal stability of high-power laser optics", Proc. SPIE 8885, Laser-Induced Damage in Optical Materials: 2013, 88851R (15 November 2013); https://doi.org/10.1117/12.2031705

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