Title: High-efficiency, fifth-harmonic generation of a joule-level neodymium laser in a large-aperture ammonium dihydrogen phosphate crystal

Abstract

High-energy deep ultraviolet (UV) sources are required for high-density plasma diagnostics. The fifth-harmonic generation of large-aperture neodymium lasers in ammonium dihydrogen phosphate (ADP) can significantly increase UV energies due to the availability of large ADP crystals. Noncritical phase matching in ADP for (ω + 4ω) was achieved by cooling a 65 × 65-mm crystal in a two-chamber cryostat to 200 K. The crystal chamber used helium as the thermally conductive medium between the crystal and the crystal chamber, which was surrounded by a high-vacuum chamber with a liquid nitrogen reservoir. A temperature variation of 0.2 K across the crystal aperture was obtained. The total conversion efficiency from the fundamental to the fifth harmonic at 211 nm was 26%.

Authors:

Begishev, I. A.; Brent, G.; Carey, S.; Chapman, R.; Kulagin, I. A.; Romanofsky, M. H.; Shoup, M. J.; Zuegel, J. D.; Bromage, J.

Publication Date:

Mon Jan 11 00:00:00 EST 2021

Research Org.:

Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1759116

Alternate Identifier(s):

OSTI ID: 1763009

Grant/Contract Number:  

AC52-07NA27344; NA0003856

Resource Type:

Published Article

Journal Name:

Optics Express

Additional Journal Information:

Journal Name: Optics Express Journal Volume: 29 Journal Issue: 2; Journal ID: ISSN 1094-4087

Publisher:

Optical Society of America (OSA)

Country of Publication:

United States

Language:

English

Subject:

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