Vol. 34, issue 01, article # 7
Ayrapetyan V. S., Makeev A. V. HGS-crystal optical parametric oscillator tunable in the wavelength range 4.75–9.07 μm. // Optika Atmosfery i Okeana. 2021. V. 34. No. 01. P. 57–60. DOI: 10.15372/AOO20210107 [in Russian].Copy the reference to clipboard
Abstract:
An optical circuit is designed for the ring cavity of an optical parametric oscillator (OPO) based on two series-mounted active elements–mercury thiagollate crystals (HgGa2S4) with the radiation tunable in the near and middle infrared ranges 4.75–9.07 mm. The dependences of the radiation idle wavelength on the phase-matching angle and of the distribution of the IR OPO output radiation intensity on the idle wavelength are calculated. A possibility of narrowing the spectral width of the output radiation by introducing a dispersing element (Fabry–Perot etalon) into the cavity is considered.
Keywords:
optical parametric oscillator, nonlinear crystal, mercury thiogallate, spectral width of laser radiation
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