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17 February 2010 LiInSe2 nanosecond optical parametric oscillator tunable from 4.7 to 8.7 µm
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Abstract
LiInSe2 is one of the few (in the meanwhile 6) non-oxide nonlinear crystals whose band-gap (2.86 eV) and transparency enabled in the past nanosecond optical parametric oscillation in the mid-IR without two-photon absorption for a pump wavelength of 1064 nm. However, the first such demonstration was limited to the 3.34-3.82 μm spectral range with a maximum idler energy of 92 μJ at 3.457 μm for a repetition rate of 10 Hz. Now we achieved broadly tunable operation, from 4.7 to 8.7 μm, reaching maximum idler pulse energy of 282 μJ at 6.514 μm, at a repetition rate of 100 Hz (~28 mW of average power).
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Aleksey Tyazhev, Georgi Marchev, Vitaliy Vedenyapin, Dmitry Kolker, Alexander Yelisseyev, Sergei Lobanov, Ludmila Isaenko, Jean-Jacques Zondy, and Valentin Petrov "LiInSe2 nanosecond optical parametric oscillator tunable from 4.7 to 8.7 µm", Proc. SPIE 7582, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IX, 75820E (17 February 2010); https://doi.org/10.1117/12.839893
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