BaGa4Se7 (BGSe) and BaGa2GeSe(BGGSe) crystals are novel infrared nonlinear optical components independently produced by Chinese scientists. Because of the exceptional detailed performance as well as important software price in laser marketplace, they have got captivated much awareness at your home and abroad.
We derive express expressions during the frame with the optical indicatrix for the next-buy efficient nonlinearity in biaxial crystals with position groups 2, m, and one, governing the conversion performance in a few-wave nonlinear optical interactions. The tabulated expressions for your monoclinic symmetry lessons 2 and m are valid for all doable orientations with the optical indicatrix relative for the crystallographic frame and for propagation along an arbitrary path outside the principal planes. They are often utilized for immediate estimation on the helpful nonlinearity in the exact same body exactly where the phase-matching loci are calculated.
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New Center infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) are synthesized. The structures of both BaGa2GeS6 and BaGa2GeSe6 ended up discovered to generally be isomorphous exhibiting a three-dimensional framework built through the parallel alignment of Ga or Ge tetrahedron teams along the c-aix. The ultraviolet transmittance spectrum signifies the shorter-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.
We generate substantial-purchase harmonics from crystalline solids employing a tunable mid-IR OPA with fifty kHz repetition charge. Using nonlinear self-compression in YAG crystals, we generate sub a few-cycle pulses at three.8 μm wavelength for prime harmonic spectroscopy. Examine a lot more
New middle infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) have been synthesized. The buildings of each BaGa2GeS6 and BaGa2GeSe6 were identified being isomorphous exhibiting a three-dimensional framework made with the parallel alignment of Ga or Ge tetrahedron groups along the c-aix. The ultraviolet transmittance spectrum indicates the brief-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.
A thermo-optic dispersion system check here for BaGa2GeSe6 rm BaGa _2 rm GeSe _6 B a G a 2 G e S e 6 nonlinear crystal is documented. The experimentally decided temperature-dependent stage-matching situations for second-harmonic and sum-frequency era of Nd:YAG laser-pumped KTiOPO4 rm KTiOPO _4 K T i O P O four (KTP) and RbTiOAsO4 rm RbTiOAsO _4 R b T i O A s O four (RTA) optical parametric oscillators as well as a CO2 rm CO _2 C O 2 laser and its harmonics inside the 0.
Because of the exceptional comprehensive effectiveness and also the important software worth in laser marketplace, they've attracted A great deal interest at your house and overseas. The progress of crystal growth and laser output of BGSe and BGGSe are summarized, and the long run enhancement is prospected.
77Growth of the new superior-general performance NLO crystal BaGa2GeSe6 by means of the controlled vapor stress technique
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A top quality BGGSe solitary crystal with measurement of thirty mm×90 mm was grown by Bridgman-stockbarger strategy, which can be the 1st in China. The profitable fabrication of BGGSe crystal equipment was also realized right after orienting, cutting, and polishing procedures, which laid a reliable Basis with the even further application analysis in the crystal.
The behavior of dislocations inside the interfacial location amongst the epitaxial layer grown through the liquid period and also the substrate of GaAs is investigated. Observations of dislocations lying along the 〈110�?Instructions have been performed utilizing an optical microscope right after shallow etching having a new chemical etchant.
$ rm BaGa _2 rm GeSe _6$ (BGGSe) is usually a freshly developed nonlinear content that is desirable for ultrabroad frequency mixing and ultrashort pulse technology due to its comparably low dispersion and higher problems threshold. A numerical research demonstrates the fabric’s capacity for octave-spanning mid-infrared pulse era approximately eighteen µm. In a primary experiment, we display that a protracted crystal size of two.
The pump pulse Vitality was managed by a variable diffraction attenuator. Its polarization was tuned by ninety° using a half-wave plate as it had to be common wave during the BGGSe (when AGS crystal was utilised, the signal beam polarization was tuned). The signal beam was focused by spherical mirror (M2, the focal length of 2 m) into a gasoline tube of 1.
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