Increasing the deuterated potassium dihydrogen phosphate crystal laser resistance by an additional conditioning with nanosecond pulses

Journal Article · Thu Sep 04 00:00:00 EDT 2025 · Optical Engineering

DOI:https://doi.org/10.1117/1.OE.65.3.031203· OSTI ID:2588986

Diop, Saaxewer B. ^[1]; Carr, Christopher W. ^[1]; Miller, Christopher F. ^[1]

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1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Laser conditioning with 355-nm sub-nanosecond laser light is a well-known procedure to increase the bulk laser-induced damage resistance of deuterated potassium dihydrogen phosphate (DKDP) crystals. In this study, we investigate a new process to further increase the bulk damage resistance of DKDP crystals by performing additional conditioning with a 6.7-ns 355-nm laser after first conditioning with a 500-ps 355-nm laser. Here, damage tests (using both small and large beams) show that the second nanosecond conditioning raster increased the fluence required to produce the same density (large beam test) and probability (small beam test) of bulk damage by ∼30%.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-07NA27344
• OSTI ID: 2588986
• Journal Information: Optical Engineering, Journal Name: Optical Engineering Journal Issue: 03 Vol. 65; ISSN 0091-3286
• Publisher: SPIE-Intl Soc Optical Eng
• Country of Publication: United States
• Language: English

Related Subjects

Crystals
Fusion energy
Laser crystals
Laser induced damage
Laser processing
National Ignition Facility
Phosphates
Potassium
Raster graphics
Resistance