Frequency converter development for the National Ignition Facility

Paul J. Wegner; Jerome M. Auerbach; Charles E. Barker; Scott C. Burkhart; Scott A. Couture; Jim J. DeYoreo; R. L. Hibbard; Lisa W. Liou; Mary A. Norton; Pamela K. Whitman; Lloyd A. Hackel

doi:10.1117/12.354152

23 July 1999 Frequency converter development for the National Ignition Facility

Paul J. Wegner, Jerome M. Auerbach, Charles E. Barker, Scott C. Burkhart, Scott A. Couture, Jim J. DeYoreo, R. L. Hibbard, Lisa W. Liou, Mary A. Norton, Pamela K. Whitman, Lloyd A. Hackel

Author Affiliations +

Proceedings Volume 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion; (1999) https://doi.org/10.1117/12.354152
Event: Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 1998, Monterey, CA, United States

Abstract

The design of the NIF incorporates a type I/type II third harmonic generator to convert the 1.053-micrometers fundamental wavelength of the laser amplifier to a wavelength of 0.351 micrometers for target irradiation. To understand and control the tolerances in the converter design, we have developed a comprehensive error budget that accounts for effects that are known to influence conversion efficiency, including variations in amplitude and phase of the incident laser pulse, temporal bandwidth of the incident laser pulse, crystal surface figure and bulk non-uniformities, angular alignment errors, Fresnel losses, polarization errors and crystal temperature variations. The error budget provides specifications for the detailed design of the NIF final optics assembly and the fabrication of optical components. Validation is accomplished through both modeling and measurement, including full-scale Beamlet tests of a 37-cm aperture frequency converter in a NIF prototype final optics cell. The prototype cell incorporates full-perimeter clamping to support the crystals, and resides in a vacuum environment as per the NIF design.

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Paul J. Wegner, Jerome M. Auerbach, Charles E. Barker, Scott C. Burkhart, Scott A. Couture, Jim J. DeYoreo, R. L. Hibbard, Lisa W. Liou, Mary A. Norton, Pamela K. Whitman, and Lloyd A. Hackel "Frequency converter development for the National Ignition Facility", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); https://doi.org/10.1117/12.354152

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