BaGa4Se7 (BGSe) and BaGa2GeSe(BGGSe) crystals are novel infrared nonlinear optical materials independently produced by Chinese scientists. As a result of outstanding extensive performance and also the essential application benefit in laser business, they've got attracted Considerably awareness at home and abroad.

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The dislocations are traced via the repetition of etching from epitaxial layer to your interface. The outcome display that dislocations within the substrates are envisioned to bend together the direction standard to the epitaxial progress path with the interface.

A thermo-optic dispersion formula for BaGa2GeSe6 rm BaGa _2 rm GeSe _6 B a G a two G e S e 6 nonlinear crystal is reported. The experimentally identified temperature-dependent stage-matching circumstances for second-harmonic and sum-frequency technology 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 get more info well as a CO2 rm CO _2 C O two laser and its harmonics within the 0.

The development of crystal growth and laser output of BGSe and BGGSe are summarized, and the long run development is prospected.

In the past many years, mid-infrared (three–twelve μm) laser sources making use of crystals with nonlinear optical properties have captivated a selected consideration due to their likely applications in various fields for example optical counter-measures and remote chemical sensing. As transparency of common oxide crystals is limited to about four μm, several researches are focused on chalcopyrite compounds on account of their large transparency inside the mid-IR vary and their potent nonlinear optical coefficients. There exists a have to have of these kinds of crystals equipped to convert successfully the near infrared wavelengths from commercially offered lasers into wavelengths higher than 5 μm by means of Optical Parametric Oscillators (OPO) programs.

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

The uniaxial nonlinear crystals BaGa2GeS6 and BaGa2GeSe6 are characterised in terms of thermal diffusivity and distinct heat in excess of a temperature variety of -90 to 250 °C for warmth propagation alongside and perpendicular to your c -axis.

It has been identified that the optical nonlinear coefficients d31 and d22 in LiNbO3 are of reverse signal, in disagreement having an earlier report by Other individuals. This is a crucial consideration for optimizing nonlinear optical interactions in LiNbO3.

The very best frequency conversion efficiency of 10⁻⁴ was attained for a relatively new PbIn6Te10 crystal, that is an get of magnitude higher than past success.

It really is demonstrated that there are wavelength combos at which the productive nonlinearity coefficient may differ only a little bit in a broad frequency band.

The character of the instability and DFG Strength lower just isn't distinct for us. Amongst the reasons is usually related using a nonlinear absorption and plasma development, respectively, that triggers reflection/scattering/absorption with the longwave mid-IR pulse. The dependence of BGGSe transmittance on pump pulse Strength is introduced in Fig.