Widely tunable (2.6-10.4 m) BaGa4Se7 optical parametric oscillator pumped by a Q-switched Nd:YLiF4 laser

We report on the first BaGa4Se7 nanosecond optical parametric oscillator pumped by Q-switched Nd:YLiF4 laser at 1053 nm. The oscillator exhibits a pump threshold energy as low as 0.25 mJ. Mid-infrared (MIR) idler wave tuning from 2.6 m to 10.4 m is demonstrated with an angle-tuned type-I (o-ee) y-cu...

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Bibliographic Details
Published in:Journal of physics communications 2018-03, Vol.2 (3)
Main Authors: Kolker, D B, Kostyukova, N Yu, Boyko, A A, Badikov, V V, Badikov, D V, Shadrintseva, A G, Tretyakova, N N, Zenov, K G, Karapuzikov, A A, Zondy, J-J
Format: Article
Language:English
Subjects:
mid-infrared (mid-IR)
nonlinear chalcogenide (BaGa
optical parametric oscillator (OPO)
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Summary:We report on the first BaGa4Se7 nanosecond optical parametric oscillator pumped by Q-switched Nd:YLiF4 laser at 1053 nm. The oscillator exhibits a pump threshold energy as low as 0.25 mJ. Mid-infrared (MIR) idler wave tuning from 2.6 m to 10.4 m is demonstrated with an angle-tuned type-I (o-ee) y-cut sample, highlighting the superior performance of this novel large bandgap chalcogenide nonlinear crystal to generate tunable coherent radiation over its full MIR transparency range (0.47-18 m). The phase-matching data are used to identify the most accurate dispersion relations of this compound among three recently published Sellmeier equations. Damage threshold measurements yielded values as high as 2.04 J cm−2 at 100 Hz pulse repetition rate, one of the largest among existing MIR χ(2)nonlinear materials.
ISSN:2399-6528
DOI:10.1088/2399-6528/aab007