BaGa4Se7 (BGSe) and BaGa2GeSe(BGGSe) crystals are novel infrared nonlinear optical resources independently formulated by Chinese experts. Because of the superb extensive functionality as well as significant software worth in laser market, they've got attracted Substantially focus in your own home and abroad.
2–ten.eight-µm wavelength area. One more essential limitation of the pump ability related which has a thermal lensing outcome in crystal was resolute experimentally. A comparison was manufactured from AgGaSe2 and ZnGeP2 crystals as components suited to the successful technology of the next harmonic of cw CO2 laser radiation.
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We generate superior-get harmonics from crystalline solids using a tunable mid-IR OPA with fifty kHz repetition price. Applying nonlinear self-compression in YAG crystals, we deliver sub a few-cycle pulses at 3.eight μm wavelength for prime harmonic spectroscopy. Read through more
New Center infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) are actually synthesized. The buildings of both equally BaGa2GeS6 and BaGa2GeSe6 ended up located to get isomorphous exhibiting a three-dimensional framework made from the parallel alignment of Ga or Ge tetrahedron teams alongside the c-aix. The ultraviolet transmittance spectrum signifies the quick-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.
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ZnGa2Se4, a nonlinear content with large mid infrared transparency and very good thermomechanical Attributes
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The uniaxial nonlinear crystals BaGa2GeS6 and BaGa2GeSe6 are characterized regarding thermal diffusivity and certain heat around a temperature choice of -90 to 250 °C for warmth propagation alongside and perpendicular to the c -axis.
The appropriate Qualities and conventions employed for the freshly emerging acentric monoclinic crystals belonging for the borate spouse and children are summarized and tabulated. The derivations are anticipated to help you build adherence to uniform nomenclature and conventions for these novel check here inorganic nonlinear crystals, also to eliminate ambiguity and escalating confusion from the literature As well as in the economic specifications. The general expressions for your powerful nonlinearity are lessened for triclinic crystals of point group 1 to simplified varieties while in the principal planes.
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The pump pulse energy was managed by a variable diffraction attenuator. Its polarization was tuned by 90° using a half-wave plate because it needed to be common wave within the BGGSe (when AGS crystal was utilized, the sign beam polarization was tuned). The signal beam was centered by spherical mirror (M2, the focal length of two m) into a fuel tube of one.
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