Widely tunable long-wave infrared difference frequency generation with a BaGa4Se7 crystal.
Appl Opt
; 60(35): 10984-10987, 2021 Dec 10.
Article
en En
| MEDLINE
| ID: mdl-35200861
ABSTRACT
We report an experimental study of long-wave infrared difference frequency generation based on BaGa4Se7 crystal. The sources of two input wavelengths were the fundamental output of a NdYAG laser and its second-harmonic pumped â¼1.2µmKTiOPO4 optical parametric oscillator. A wide tuning range of 7.9-17.5 µm (>1.14 octave) was achieved, which reached the upper limit of the BaGa4Se7 transparency region. The spectra and pulse widths, input-output relationship, beam profile, wavelength tolerance, and angular acceptance of the phase-matching were characterized in detail. This presented coherent source can potentially be applied in multiple gas analyses and spectral imaging.
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Colección:
01-internacional
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MEDLINE
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En
Revista:
Appl Opt
Año:
2021
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Article