Overview of laser damage performance of the third-harmonic frequency conversion crystals on the National Ignition Facility

R. A. Negres; D. A. Cross; F. Ravizza; J. J. Adams; S. H Baxamusa; Z. M. Liao; M. A. Norton; K. I Schaffers; P. K Whitman; C. W. Carr

doi:10.1117/12.2500342

6 December 2018 Overview of laser damage performance of the third-harmonic frequency conversion crystals on the National Ignition Facility

R. A. Negres, D. A. Cross, F. Ravizza, J. J. Adams, S. H Baxamusa, Z. M. Liao, M. A. Norton, K. I Schaffers, P. K Whitman, C. W. Carr

Author Affiliations +

Proceedings Volume 10805, Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference; 1080520 (2018) https://doi.org/10.1117/12.2500342
Event: SPIE Laser Damage, 2018, Boulder, Colorado, United States

Abstract

We report on the laser damage performance of the DKDP third-harmonic frequency conversion crystals (THG) on the National Ignition Facility (NIF) since its operations began in 2009. An in-situ damage inspection system is used to monitor and track status of final optics in the UV section of the laser over time. Most THG optics last between 2 and 5 years on NIF before damage grows large enough that we have to exchange them. The critical damage size is related to our recycle strategy. About 10% of optics have lasted 10+ years which show we are not even close to the inherent limitation for this optic type. The short life THG optics are all limited by a relatively few number of flaws. Here we describe our efforts to understand these flaws so we can manage and, eventually, eliminate them.

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R. A. Negres, D. A. Cross, F. Ravizza, J. J. Adams, S. H Baxamusa, Z. M. Liao, M. A. Norton, K. I Schaffers, P. K Whitman, and C. W. Carr "Overview of laser damage performance of the third-harmonic frequency conversion crystals on the National Ignition Facility", Proc. SPIE 10805, Laser-Induced Damage in Optical Materials 2018: 50th Anniversary Conference, 1080520 (6 December 2018); https://doi.org/10.1117/12.2500342

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