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2–10.8-µm wavelength region. A further vital limitation of the pump energy connected having a thermal lensing effect in crystal was determined experimentally. A comparison was made of AgGaSe2 and ZnGeP2 crystals as products suitable for the efficient generation of the 2nd harmonic of cw CO2 laser radiation.
spectral vary. In addition, we existing new Sellmeier equations that provide a great replica in the
New middle infrared nonlinear optical crystals of BaGa2GeX6(X=S, Se) are actually synthesized. The buildings of each BaGa2GeS6 and BaGa2GeSe6 have been observed being isomorphous exhibiting a three-dimensional framework produced with the parallel alignment of Ga or Ge tetrahedron groups along the c-aix. The ultraviolet transmittance spectrum implies the brief-wavelength absorption edges of BaGa2GeS6 and BaGa2GeSe6 are 380 nm and 440 nm, respectively.
We deliver large-order harmonics from crystalline solids employing a tunable mid-IR OPA with fifty kHz repetition price. Applying nonlinear self-compression in YAG crystals, we make sub a few-cycle pulses at three.8 μm wavelength for high harmonic spectroscopy. Read through a lot more
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Because of the exceptional detailed functionality as well as important application value in laser field, they may have captivated much interest in your house and overseas. The development of crystal development and laser output of BGSe and BGGSe are summarized, and the longer term progress is prospected.
Throughout the previous a long time, mid-infrared (three–twelve μm) laser resources working with crystals with nonlinear optical Attributes have captivated a particular interest due to their probable apps in different fields such as optical counter-actions and distant chemical sensing. As transparency of widespread oxide crystals is restricted to about four μm, many researches have already been centered on chalcopyrite compounds on account of their wide transparency from the mid-IR vary and their powerful nonlinear optical coefficients. There exists a need of these types of crystals in a position to convert competently the near infrared wavelengths from commercially accessible lasers into more info wavelengths better than five μm through Optical Parametric Oscillators (OPO) devices.
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A top quality BGGSe one crystal with size of 30 mm×90 mm was grown by Bridgman-stockbarger strategy, that's the 1st in China. The thriving fabrication of BGGSe crystal devices was also accomplished right after orienting, reducing, and sharpening processes, which laid a solid foundation to the even more application analysis of the crystal.
The habits of dislocations while in the interfacial region amongst the epitaxial layer grown with the liquid period as well as the substrate of GaAs is investigated. Observations of dislocations lying along the 〈110�?directions were being performed making use of an optical microscope right after shallow etching by using a new chemical etchant.
$ rm BaGa _2 rm GeSe _6$ (BGGSe) is often a freshly designed nonlinear content that is certainly attractive for ultrabroad frequency mixing and ultrashort pulse era as a result of its comparably lower dispersion and higher harm threshold. A numerical analyze demonstrates the material’s potential for octave-spanning mid-infrared pulse era as many as 18 µm. In a primary experiment, we show that an extended crystal duration of 2.
Barium gallium germanium selenium (BaGa2GeSe6, BGGSe) crystal is a novel infrared nonlinear optical product with superb efficiency, which was found by Chinese researchers. Up to now, there is not any report on massive size single crystal development of the crystal in China. With this review, polycrystalline BGGSe was synthesized productively through the use of a self-built two-zone furnace with the level of 400 g in one operate.
BaGa2GeSe6 crystals are utilized for nonlinear optical frequency conversion in their transparency array. The wavelengths at which highest conversion efficiencies can be received as well as the tuning vary for big difference-frequency technology are identified.