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Proceedings Paper

Upconversion of the mid-IR pulses to the near-IR in LiGaS2
Author(s): Kiyoshi Kato; Nobuhiro Umemura; Takuya Okamoto; Valentin Petrov
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Paper Abstract

This paper reports on the phase-matching properties of LiGaS2 for upconverting a Nd:YAG laser-pumped KTP and AgGaS2 optical parametric oscillator (OPO) at mid-IR to the near-IR by mixing with its pump source together with the new Sellmeier equations that provide a good reproduction of the present experimental results as well as the published data points of second-harmonic generation (SHG) and sum-frequency generation (SFG) of a CO2 laser, a Ti:Al2O3 laser-pumped optical parametric amplifier (OPA), and a Nd:YAG laser-pumped OPO in the mid-IR.

This index formula gives the important information that group velocity mismatch (GVM) (Δsp = 1/υs - 1/υp) of LiGaS2 in the 4 - 11 μm range is 12 ~ 27 fs/mm lower than that of the widely used LiInS2, which makes it ideal for the upconversion of the mid-IR femtosecond pulses having large spectral bandwidths to the near-IR.

Paper Details

Date Published: 15 February 2018
PDF: 6 pages
Proc. SPIE 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII, 105161D (15 February 2018); doi: 10.1117/12.2286762
Show Author Affiliations
Kiyoshi Kato, Chitose Institute of Science and Technology (Japan)
Okamoto Optics Works, Inc. (Japan)
Nobuhiro Umemura, Chitose Institute of Science and Technology (Japan)
Takuya Okamoto, Okamoto Optics Works, Inc. (Japan)
Valentin Petrov, Max-Born Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)

Published in SPIE Proceedings Vol. 10516:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVII
Konstantin L. Vodopyanov; Kenneth L. Schepler, Editor(s)

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