[1] ALLAKHVERDIEV K R,GULIEV R I,SALAEV E Y,et al.. Investigation of linear and nonlinear optical properties of GaSxSe1-x crystals[J]. Sov. J. Quantum Electron.,1982,12:947-948. [2] SUHRE D R,SINGH N B,BALAKRISHNA V,et al.. Improved crystal quality and harmonic generation in GaSe doped with indium[J]. Opt. Lett.,1997,22:775-777. [3] FENG Z S,KANG Z H,WU F G,et al.. SHG in doped GaSe:In crystals[J]. Opt. Express,2008,16:9978-9985. [4] HSU Y K,CHEN C W,HUANG J Y,et al.. Erbium doped GaSe crystal for mid-IR applications[J]. Opt. Express,2006,14:5484-5491. [5] ZHANG H Z,KANG Z H,JIANG Y,et al.. SHG phase matching in GaSe and mixed GaSe1-xSx,x≤0.412, crystals at room temperature[J]. Opt. Express,2008,16:9951-9957. [6] SINGH N B,SUHRE D R,ROSCH W,et al.. Modified GaSe crystals for mid-IR applications[J]. J. Cryst. Growth,1999,198:588-592. [7] ZHANG Y F,WANG R,KANG Z H,et al.. AgGaS2- and Al-doped GaSe crystals for IR applications[J]. Opt. Commun.,2011,284:1677-1681. [8] DAS S,GHOSH C,VOEVODINA O G,et al.. Modified GaSe crystal as a parametric frequency converter[J]. Appl. Phys. B,2006,82:43-46. [9] ANDREEV Y M,ATUCHIN V V,LANSKII G V,et al.. Growth, real structure and applications of GaSe1-xSx crystals[J]. Mat. Sci. Eng. B,2006,128:205-210. [10] WANG T J,GAO J C,ANDREEV Y M,et al.. GaSe1-xSx solid solutions[J]. Rus. Phys. J.,2007,50:560-565. [11] QU Y,KANG Z H,WANG T J,et al.. GaSe1-xSx second harmonic generators for CO2 lidars[J]. Atmos. Oceanic Opt.,2008,21:146-151. [12] KU S A,LUO C W,LIO H L,et al.. Optical properties of nonlinear solid solution GaSe1-xSx(0<x≤0.4) crystals[J]. Rus. Phys. J.,2008,51:1083-1089. [13] MAYER G V,KOPYLOVA T N,ANDREEV Y M,et al.. Parametrical conversion of the frequency of organic lasers into the middle-IR range of the spectrum[J]. Rus. Phys. J.,2009,52:640-645. [14] CHU L L,ZHANG I F,KANG Z H,et al.. Phase matching for the second harmonic generation in GaSe crystals[J]. Rus. Phys. J.,2011,53:1235-1242. [15] SARKISOV S Y,NAZAROV M M,SHKURINOV A P,et al.. GaSe1-xSx and GaSe1-xTex solid solutions for terahertz generation and detection[C]//Proc. of the 34th Int. Conf. IRMMW-THz-2009,Busan,Korea,2009,paper M1A02.0370. [16] KOKH K A,ANDREEV Y M,SVETLICHNYI V A,et al.. Growth of GaSe and GaS single crystals[J]. Cryst. Res. Technol.,2011,46:327-330. [17] ZHANG L M,GUO J,LI D J,et al.. Dispersion properties of GaSe1-xSx in the terahertz range[J]. J. Appl. Spectr.,2011,77:850-856. [18] ANDREEV Y M,KOKH K A,LANSKII G V,et al.. Structural characterization of pure and doped GaSe by nonlinear optical method[J]. J. Cryst. Growth,2011,318:1164-1166. [19] ANDREEV Y M,KOKH K A,LANSKII G V. Handbook for Nonlinear Optical Crystals[M]. 3rd ed. Berlin:Springer,1999.