Laser damage to production- and research-grade KDP crystals

Frank Rainer; L. Jeffrey Atherton; James J. De Yoreo

doi:10.1117/12.147418

24 June 1993 Laser damage to production- and research-grade KDP crystals

Frank Rainer, L. Jeffrey Atherton, James J. De Yoreo

Proceedings Volume 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992; (1993) https://doi.org/10.1117/12.147418
Event: Optical Materials for High Power Lasers, 1992, Boulder, CO, United States

Abstract

We present the results of laser damage measurements conducted on potassium dihydrogen phosphate (KDP) and deuterated potassium dihydrogen phosphate (KD^*P) crystals that were grown recently for both production and research applications by several sources. We have measured extrinsic damage thresholds that cover wavelengths from 1064 nm to 266 nm at pulse durations in the 3 to 10 ns regime. Many of the samples were extracted from boules grown specifically to yield large-area crystals, up to 32 cm square, for laser fusion applications. These crystals were the result of efforts, both by the Lawrence Livermore National Laboratory (LLNL) and commercial crystal-growth companies, to yield high- threshold KDP. In particular we have established that such crystals can reliably survive fluences exceeding 15 J/cm² at 355 nm and 20 J/cm² at 1064 nm when irradiated with 3 ns pulses. We present details of how bulk and surface damage to these crystals scale with pulse duration and wavelength as well as of morphological effects due to laser conditioning.

Citation Download Citation

Frank Rainer, L. Jeffrey Atherton, and James J. De Yoreo "Laser damage to production- and research-grade KDP crystals", Proc. SPIE 1848, 24th Annual Boulder Damage Symposium Proceedings -- Laser-Induced Damage in Optical Materials: 1992, (24 June 1993); https://doi.org/10.1117/12.147418

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