BaGa4Se7 (BGSe) and BaGa2GeSe(BGGSe) crystals are novel infrared nonlinear optical resources independently formulated by Chinese scientists. Due to excellent comprehensive general performance and also the significant software value in laser field, they have got attracted Substantially awareness at your home and overseas.

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New middle infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) are already synthesized. The structures of both equally BaGa2GeS6 and BaGa2GeSe6 were being observed to become isomorphous exhibiting a three-dimensional framework created with the parallel alignment of Ga or Ge tetrahedron teams along the c-aix. The ultraviolet transmittance spectrum indicates the limited-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.

A thermo-optic dispersion formula for BaGa2GeSe6 rm BaGa _2 rm GeSe _6 B a G a two G e S e six nonlinear crystal is claimed. The experimentally determined temperature-dependent period-matching disorders 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 more info as a CO2 rm CO _2 C O 2 laser and its harmonics from the 0.

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Laser-induced harm threshold from the nonlinear crystals BaGa4Se7 and BaGa2GeSe6 at 2091 nm within the nanosecond routine

A high quality BGGSe single crystal with sizing of thirty mm×90 mm was developed by Bridgman-stockbarger method, and that is the main in China. The effective fabrication of BGGSe crystal gadgets was also realized just after orienting, slicing, and sharpening processes, which laid a reliable foundation for the further application investigation on the crystal.

The conduct of dislocations from the interfacial location in between the epitaxial layer developed within the liquid section and also the substrate of GaAs is investigated. Observations of dislocations lying together the 〈one hundred ten�?Instructions ended up carried out employing an optical microscope just after shallow etching which has a new chemical etchant.

forty six m length stuffed by CO2 at three atm gas stress in which the laser pulse was broadened as a consequence of self-section modulation underneath filamentation. Then, the pump and sign pulses had been combined jointly. Enough time correlation of the pump and signal pulses was controlled through the pump pulse arm length in the adjustment of mirror M3 situation.

The pump pulse Power was controlled by a variable diffraction attenuator. Its polarization was tuned by 90° with a 50 percent-wave plate because it needed to be everyday wave in the BGGSe (when AGS crystal was employed, the signal beam polarization was tuned). The signal beam was focused by spherical mirror (M2, the focal duration of 2 m) into a gasoline tube of 1.

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