Abstract
0.56GeS2-0.24Ga2S3-0.2KI (mol%) chalcohalide glass was prepared and second-harmonic generation was observed by the thermal poling process. Second-order optical nonlinearity in the glass was also investigated by different poling temperature, voltage and time to optimize the poling parameters to improve χ (2). The maximum χ (2) in our study as large as 3.74 pm/V was obtained under the optimized poling condition with 5.2 kV, 260°C and 120 minutes.
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