Optical parametric oscillator on an Hg_1-xCd_xGa₂S₄crystal

Nd:YAG pumped nanosecond optical parametric oscillator based on LiInSe_2 with tunability extending from 47 to 87 μm

“…Thus nanosecond optical parametric oscillators (OPOs) seem to possess the best potential for achieving high average power and single pulse energy. Such OPOs, pumped in the 1 µm range, have been demonstrated, however, only with 5 of the 14 compounds analyzed in [2]: Ag 3 AsS 3 [3][4][5], AgGaS 2 [6][7][8][9], HgGa 2 S 4 [10], LiInSe 2 [11], and the solid solution Cd x Hg 1-x Ga 2 S 4 [12]. Moreover, apart from the archive Ag 3 AsS 3 [5], oscillation at idler wavelengths exceeding 4.4 µm has been demonstrated only with AgGaS 2 [8,9], achieving impressive tunability from 3.9 to 11.3 µm [8].…”

Progress in 1-μm Pumped Mid-IR Optical Parametric Oscillators Based on Non-Oxide Nonlinear Crystals

“…The main problem with it is the control of the homogeneity in the growth process [15]. Nevertheless, this solid solution enabled for the first time NCPM in a ~1-µm pumped mid-IR OPO [43][44] which is possible with AGS or HGS only at shorter pump wavelengths where TPA will be detrimental.…”

Cd1−xMnxTe (x = 0.1–0.78) crystals doped with Fe2+ions: spectroscopic properties and laser oscillations at 4.95–5.27µm at low temperature

“…Crystals doped with chromium ions Cr 2+ (Cr 2+ :Cd 0.55 Mn 0.45 Te or Cr 2+ :CdSe) demonstrated laser operation in the wavelength range 2-3 µm [3,4]. Optical parametric oscillators (OPOs) based on Hg 1−x Cd x Ga 2 S 4 or CdSiP 2 were shown to emit continuously tunable radiation in the mid-IR region around 3 µm [5] or 6.2 µm [6].…”