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- W1748485440 abstract "Mastering of the middle IR range is attractive for many applications, such as lidar gas analyzers, optoelectronic countermeasures for suppression of IR detecting, optical communication systems, and scientific and medical instrument. However, until now this has been held back by the lack of commercial coherent radiation sources with necessary energy parameters and efficiency. AgGa<sub>1-x</sub>In<sub>x</sub>Se<sub>2</sub> and Hg<sub>1-x</sub>Cd<sub>x</sub>Ga<sub>2</sub>S<sub>4</sub> are well-known middle IR crystal families introduced in recent years. The main advantage of them is that their physical properties including refractive indices and birefringence can be engineered by varying the contents of Ga, In, Cd and Hg. Consequently, the phase matching range can be extended and the 90° non-critical phase matching in three-wave interaction can be realized within a certain wavelength band. In consideration of influence of composition ratio, acceptable composition ratio and group velocity mismatch of ultra-short pulses on nonlinear properties of AgGa<sub>1-x</sub>In<sub>x</sub>Se<sub>2</sub> and Hg<sub>1-x</sub>Cd<sub>x</sub>Ga<sub>2</sub>S<sub>4</sub> are investigated for the first time. The corresponding phase-matching diagrams and spectral dependence of the acceptable composition ratio on wavelengths for second harmonic generation and optical parametric oscillation pumped by the popular Nd<sup>3+</sup>:YAG (1.06 &mgr;m) and Ho<sup>3+</sup>:ILF (2.08 &mgr;m) lasers are estimated and demonstrated with accounting of available Sellmeier coefficients. Group velocity matching for second harmonic, optical parametric generation under the pump of the two lasers in AgGa<sub>1-x</sub>In<sub>x</sub>Se<sub>2</sub> and Hg<sub>1-x</sub>Cd<sub>x</sub>Ga<sub>2</sub>S<sub>4</sub> are carried out as well. All relative results are compared and analyzed within a number of sampling values or continuum of composition ratios. In addition, the utilities of AgGa<sub>1-x</sub>In<sub>x</sub>Se<sub>2</sub> and Hg<sub>1-x</sub>Cd<sub>x</sub>Ga<sub>2</sub>S<sub>4</sub> for second harmonic generation are also discussed finally." @default.
- W1748485440 created "2016-06-24" @default.
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- W1748485440 date "2007-01-30" @default.
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- W1748485440 title "<title>Influence of composition ratio on the nonlinear optical properties of AgGa<formula><inf><roman>1-x</roman></inf></formula>In<formula><inf><roman>x</roman></inf></formula>Se<formula><inf><roman>2</roman></inf></formula> and Hg<formula><inf><roman>1-x</roman></inf></formula>Cd<formula><inf><roman>x</roman></inf>&…" @default.
- W1748485440 doi "https://doi.org/10.1117/12.726456" @default.
- W1748485440 hasPublicationYear "2007" @default.
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