BaGa2GeSe6 Crystal - An Overview
BaGa2GeSe6 Crystal - An Overview
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BaGa4Se7 (BGSe) and BaGa2GeSe(BGGSe) crystals are novel infrared nonlinear optical resources independently designed by Chinese researchers. As a result of exceptional complete functionality along with the critical application value in laser business, they have captivated much attention in your house and overseas.
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New middle infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) have been synthesized. The buildings of equally BaGa2GeS6 and BaGa2GeSe6 have been located being isomorphous exhibiting A 3-dimensional framework constructed because of the parallel alignment of Ga or Ge tetrahedron teams along the c-aix. The ultraviolet transmittance spectrum implies the limited-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.
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Due to the outstanding complete general performance as well as the vital application value in laser sector, they have got attracted Considerably notice in your own home and abroad. The progress of crystal development and laser output of BGSe and BGGSe are summarized, and the future advancement is prospected.
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A high quality BGGSe solitary crystal with measurement of 30 mm×ninety mm was grown by Bridgman-stockbarger process, that is the initial in China. The profitable fabrication of BGGSe crystal units was also obtained immediately after orienting, slicing, and polishing procedures, which laid a reliable foundation for the further software investigation in the crystal.
A thermo-optic dispersion method for BaGa2GeSe6 rm BaGa _2 rm GeSe _6 B a G a 2 G e S e six nonlinear crystal is documented. The experimentally established temperature-dependent phase-matching circumstances for 2nd-harmonic and sum-frequency technology of Nd:YAG laser-pumped KTiOPO4 rm KTiOPO _4 K T i O P O 4 (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 two laser and its harmonics while in the 0.
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It's demonstrated there are wavelength combos at which the efficient nonlinearity coefficient differs only slightly in a wide frequency band.
The nature of this instability and DFG Strength lessen is not obvious for us. One among the reasons may be related with a nonlinear absorption and plasma development, respectively, that causes reflection/scattering/absorption from the longwave mid-IR pulse. The dependence of BGGSe transmittance on pump pulse energy is offered in Fig.