Design and optimization of a high-energy optical parametric amplifier for broadband, spectrally incoherent pulses

Ekanayake, N.; Spilatro, M.; Bolognesi, A.; Herman, S.; Sampat, S.; Hill, E. M.; Dorrer, C.

doi:10.1364/oe.486561

Title: Design and optimization of a high-energy optical parametric amplifier for broadband, spectrally incoherent pulses

Journal Article · 11 May 2023 · Optics Express

DOI: https://doi.org/10.1364/oe.486561 · OSTI ID:1973302

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^[1]; Bolognesi, A. ^[1]; Herman, S. ^[1];

^[1]; Hill, E. M. ^[1];

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University of Rochester, NY (United States)

Spectrally incoherent laser pulses with sufficiently large fractional bandwidth are in demand for the mitigation of laser–plasma instabilities occurring in high-energy laser–target interactions. Here, we modeled, implemented, and optimized a dual-stage high-energy optical parametric amplifier for broadband, spectrally incoherent pulses in the near-infrared. The amplifier delivers close to 400 mJ of signal energy through noncollinear parametric interaction of 100-nJ-scale broadband, spectrally incoherent seed pulses near 1053 nm with a narrowband high-energy pump operating at 526.5 nm. Mitigation strategies for high-frequency spatial modulations in the amplified signal caused by index inhomogeneities in the Nd:YLF rods of the pump laser are explored and discussed in detail.

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Research Organization:: Univ. of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003856; SC0021032

OSTI ID:: 1973302

Alternate ID(s):: OSTI ID: 1984847

Journal Information:: Optics Express, Vol. 31, Issue 11; ISSN 1094-4087

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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