Image processing and control of a programmable spatial light modulator for spatial beam shaping

Abdul A. S. Awwal; Charles Orth; Eddy Tse; JoAnn Matone; Mitanu Paul; Carla Hardy; Gordon Brunton; Mark Hermann; Steve Yang; J. M. M. DiNicola; Matt Rever; Sham Dixit; John Heebner

doi:10.1117/12.2008542

18 February 2013 Image processing and control of a programmable spatial light modulator for spatial beam shaping

Abdul A. S. Awwal, Charles Orth, Eddy Tse, JoAnn Matone, Mitanu Paul, Carla Hardy, Gordon Brunton, Mark Hermann, Steve Yang, J. M. M. DiNicola, Matt Rever, Sham Dixit, John Heebner

Author Affiliations +

Proceedings Volume 8602, High Power Lasers for Fusion Research II; 86020A (2013) https://doi.org/10.1117/12.2008542
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

Programmable spatial shapers using liquid-crystal-based spatial-light-modulators in the National Ignition Facility lasers enable spatial shaping of the beam profile so that power delivered to the target can be maximized while maintaining system longevity. Programmable spatial shapers achieve three objectives: Introduce obscurations shadowing isolated flaws on downstream optical elements that could otherwise be affected by high fluence laser illumination; Spatial shaping to reduce beam peak-to-mean fluence variations to allow the laser to operate at higher powers so that maximum power can be delivered to the target; And finally gradually exposing the optical regions that have never seen laser light because they have always had shadowing from a blocker that is no longer needed. In this paper, we describe the control and image processing algorithms that determine beam shaping and verification of the beam profile. Calibration and transmittance mapping essential elements of controlling the PSS are described along with spatially nonlinear response of the device such as scale and rotation.

Citation Download Citation

Abdul A. S. Awwal, Charles Orth, Eddy Tse, JoAnn Matone, Mitanu Paul, Carla Hardy, Gordon Brunton, Mark Hermann, Steve Yang, J. M. M. DiNicola, Matt Rever, Sham Dixit, and John Heebner "Image processing and control of a programmable spatial light modulator for spatial beam shaping", Proc. SPIE 8602, High Power Lasers for Fusion Research II, 86020A (18 February 2013); https://doi.org/10.1117/12.2008542

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