Non-linear Optical Properties And Structure Of Ge-Ga-S Chalcohalide Glasses

With the coming of information times, second-order nonlinear optical materials will have wide applications in the fields of optical information processing, optical sensing, and telecommunications. Because of the nonlinear optical glasses with low cost and simple preparation, chemical stability, etc will became the candidate-selected material prepared of low cost of all optics device and is concerned by vast scientific researcher extremely. Chalcogenide glasses are novel materials with very intriguing properties for a variety of photonic applications. In addition, in favor with the IR transmitting property and random quasi-phase-matching technique, chalcogenide crystallized glasses will open a new way to a cheap and efficient optical converter operating in mid-IR spectral region.In this paper, we prepared the two system chalcohalide glasses of 0.6GeS2-0.3Ga2S3-0.1KCl and 0.65GeS2-0.25Ga2S3-0.1LiI by the method of melt-quenching. Based the Tp,Tx and other characteristic temperature of the two as-prepared glasses,the as-prepared samples were characterized by XRD,Raman,SEM,UV-Vis spectra,SHG and so on to explore the relationship among the heating technical parameter,structure,capability and glass phase. The main results and conlusions are as follows:1 Based the research of the characteristic temperature and the heating technical parameter by DSC technique, there was controling nucleation and growing in the 410℃heating treating with chalcohalide glasses of 0.6GeS2-0.3Ga2S3-0.1KCl; and there was controling nucleation and growing in the 403℃heating treating with chalcohalide glasses of 0.65GeS2-0.25Ga2S3-0.1LiI too.2 Based the analysis of the XRD and Raman spectra, it was crystal Ga2S3 in 0.6GeS2-0.3Ga2S3-0.1KCl chalcohalide glasses by the 410℃heating treating; but it was crystal LixGaySz in 0.65GeS2-0.25Ga2S3-0.1LiI chalcohalide glasses by the 403℃heating treating.3 In order to keep the high transmisssion spectra, the time of 410℃heating treating of 0.6GeS2-0.3Ga2S3-0.1KCl chalcohalide glasses should be under 20 hours by the UV-Vis spectra and SEM; and the time of 403℃heating treating of 0.65GeS2-0.25Ga2S3-0.1LiI chalcohalide glasses should be under 60 hours by the UV-Vis spectra and SEM.4 The tests of SHG explain that the 0.6GeS2-0.3Ga2S3-0.1KCl and 0.65GeS2-0.25Ga2S3-0.1LiI chalcohalide glasses could be controled nucleation and growing by the heating treating, but the second order nonlinear optical coefficient of 0.6GeS2-0.3Ga2S3-0.1KCl chalcohalide glasses was higher than the 0.65GeS2-0.25Ga2S3-0.1LiI chalcohalide glasses.