Widely tunable (2.6–10.4 μm) baga4se7 optical parametric oscillator pumped by a q-switched nd:ylif4 laser

D. B. Kolker, N. Yu Kostyukova, A. A. Boyko, V. V. Badikov, D. V. Badikov, A. G. Shadrintseva, N. N. Tretyakova, K. G. Zenov, A. A. Karapuzikov, J. J. Zondy

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15 Citations (Scopus)


Wereport 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. Midinfrared (MIR) idler wave tuning from 2.6 μmto 10.4 μmis 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 μm). 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.

Original languageEnglish
Article number035039
JournalJournal of Physics Communications
Issue number3
Publication statusPublished - Mar 2018


  • Mid-infrared (mid-IR)
  • Nonlinear chalcogenide (BaGaSe)
  • Optical parametric oscillator (OPO)

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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