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Publications (5)14.15 Total impact

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    ABSTRACT: The optical properties of p-type GaSe and mixed GaSe(1-x)S(x), x=0.04, 0.023, 0.090, 0.133, 0.175, 0.216, 0.256, 0.362, 0.369, and 0.412, crystals were studied to reveal the potentials for phase matching and frequency conversion. Comparative experiment on Er3+:YSGG and CO2 laser SHG at identical experimental conditions is carried out at room temperature. Any change in polytype structure of GaSe1(1-x)S(x) was not found.
    Optics Express 07/2008; 16(13):9951-7. · 3.55 Impact Factor
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    ABSTRACT: Optical transmission range and phase matching (PM) conditions for second harmonic generation (SHG) of Er3+:YSGG and CO2 laser in indium doped GaSe:In(0.1, 1.23, 2.32 mass%) are studied in comparison with these in pure and sulfur doped GaSe:S(0.09, 0.5, 2.2, 3 mass%) crystals. No changes in transparency curve are found in GaSe crystals up to 2.32 mass% indium content, but as small change as 0.18 degrees in PM angle for 2.79 microm Er3+:YSGG laser SHG and approximately 0.06 degrees for 9.58 microm CO2 laser emission line SHG are detected. PM properties of the crystals are evaluated as a function of temperature over the range from -165 to 230 degrees C. The value of dtheta/dT, the change in PM angle with variation of temperature, is found to be very small for GaSe:In crystals. While for SHG of Er3+:YSGG laser, dtheta/dT =22"/1 degrees C only, it is as small as -4.9"/1 degrees C for that of CO2 laser radiation. Linear variation of PM angle with temperature increasing is an indicator of absence of crystals structure transformation within temperature range from -165 to 230 degrees C. Thus, application of GaSe:In solid solutions in high average power nonlinear optical systems seems to be prospective.
    Optics Express 07/2008; 16(13):9978-85. · 3.55 Impact Factor
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    ABSTRACT: The optical properties of p-type GaSe and mixed GaSe1-x S x , x=0.04, 0.023, 0.090, 0.133, 0.175, 0.216, 0.256, 0.362, 0.369, and 0.412, crystals were studied to reveal the potentials for phase matching and frequency conversion. Comparative experiment on Er3+:YSGG and CO2 laser SHG at identical experimental conditions is carried out at room temperature. Any change in polytype structure of GaSe1-x S x was not found.
    Optics Express 06/2008; 16(13). · 3.55 Impact Factor
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    ABSTRACT: Modeling and experimental study on phase matching of second harmonic generation in different color Hg Ga <sub>2</sub> S <sub>4</sub> crystals are carried out. Using the known Sellmeier equations, the dispersion relation with weighting proportionally to short-wavelength boundary of the crystal transparency band is proposed. Optimal dispersion relations and phase-matched conditions for different color Hg Ga <sub>2</sub> S <sub>4</sub> crystals can be specified.
    Applied Physics Letters 05/2007; · 3.52 Impact Factor
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    ABSTRACT: _____________ 1 The work was supported by NSFC (Nos. 10334010, 10774059), the doctoral program foundation of institution of High Education of China and the National Basic Research Program (2006BC921103), joint Grant of RBRF (No. 07 02 92001 ННС_а) and NSCT (No. 96WFA0600007). One of the authors (G.L.) also gratefully acknowledges Russian Science Support Foundation and Presidium SB RAS. Abstract – Optical properties of p-type GaSe and modified solid solution GaSe 1–x S x , x = 0.04–0.412, crystals were studied to reveal the potentials for phase matching and frequency conversion. First comparative experiment on Er 3+ :YSGG and CO 2 laser SHG is carried out at room temperature and identical experimental conditions. The temperature phase matching properties for Er 3+ :YSGG and CO 2 laser SHG in GaSe and mixed GaSe 1–x S x , x = 0.09, 0.175, and 0.369, crystals are also studied throughout 108–500 K temperature range. We have demonstrated that acentrosymmetric structure of these crystals does not transform to centrosymmet-ric β-polytype structure with mixing ratio and tem-perature and the crystals are still useful for nonlin-ear application. GaSe 1–x S x , x = 0.090–0.362, crystals shown 15 to 30% higher damage threshold to that of pure GaSe crystals and up to 240% in SHG effi-ciency. Temperature dispersions of phase matching from dθ/dT = –4.9′′/1 °C to 22′′/1 °C and phase matching temperature bandwidth from 22 °C ⋅ cm to 219 °C ⋅ cm FWHM are determined, so as 2-fold improvement in hardness at x = 0.1 and 4-fold at x = 0.4 to that of pure GaSe.