In:
Applied Optics, Optica Publishing Group, Vol. 59, No. 17 ( 2020-06-10), p. 5247-
Abstract:
Using an 8 µm long-wave infrared laser as the fundamental wave, we
achieved second-harmonic generation (SHG) and sum-frequency generation simultaneously in A g G a G e 5 S e 12 and obtained a 4 µm laser output.
Among them, SHG was achieved in the 173 nm spectral range of the fundamental wave, which was consistent with theoretical calculations.
The average power of the obtained 4 µm laser was 41 mW, corresponding to an optical-to-optical conversion efficiency of 3.2%. The measured
temperature acceptance bandwidth ( L δ T ) (FWHM) was 50 K·cm; the angular
acceptance bandwidth ( L δ θ ) (FWHM) was 13.3 mrad·cm; and the
average absorption coefficient in the wavelength range of 0.86–11.30 µm was 0.07 c m − 1 . In addition, the spectral acceptance
bandwidth ( L δ λ ) of fundamental wave in A g G a G e 5 S e 12 SHG and the spectral gain bandwidth
of frequency downconversion in A g G a G e 5 S e 12 were calculated. In view of the small
absorption coefficient, the large temperature acceptance bandwidth, and the large spectral gain bandwidth, we conclude that A g G a G e 5 S e 12 is a suitable nonlinear crystal for
high-power short/mid/long-wave infrared lasers and frequency conversions of nanosecond-femtosecond infrared lasers. These results
are conducive to the further development of A g G a G e 5 S e 12 lasers.
Type of Medium:
Online Resource
ISSN:
1559-128X
,
2155-3165
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2020
detail.hit.zdb_id:
207387-0
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