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Proceedings Paper

Use Of Adaptive Optics Element For Wavefront Error Correction In The Gemini CO[sub]2[/sub] Laser Fusion System
Author(s): V. K. Viswanathan; J. V. Parker; T. A. Nussmier; C. J. Swigert; W. King; A. S. Lau; K. Price
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Paper Abstract

The Gemini two beam CO2 laser fusion system incorporates a complex optical system with nearly 100 surfaces per beam, associated with the generation, transport and focusing of CO2 laser beams for irradiating laser fusion targets. Even though the system is nominally diffraction limited, in practice the departure from the ideal situation drops the Strehl ratio to 0.24. This departure is caused mostly by the imperfections in the large (34 cm optical clear aperture diameter) state-of-the-art components like the sodium chloride windows and micromachined mirrors. While the smaller optical components also contribute to this degradation, the various possible misalignments and nonlinear effects are considered to contribute very little to it. Analysis indicates that removing the static or quasi-static errors can dramatically improve the Strehl ratio. A deformable mirror which can comfortably achieve the design goal Strehl ratio of ≥ 0.7 is described, along with the various system trade-offs in the design of the mirror and the control system.

Paper Details

Date Published: 13 November 1980
PDF: 7 pages
Proc. SPIE 0190, Los Alamos Conference on Optics 1979, (13 November 1980); doi: 10.1117/12.957750
Show Author Affiliations
V. K. Viswanathan, University of California (United States)
J. V. Parker, University of California (United States)
T. A. Nussmier, University of California (United States)
C. J. Swigert, University of California (United States)
W. King, University of California (United States)
A. S. Lau, University of California (United States)
K. Price, University of California (United States)


Published in SPIE Proceedings Vol. 0190:
Los Alamos Conference on Optics 1979
Donald H. Liebenberg, Editor(s)

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