文章提出了一种利用光学参量振荡器Optical Parametric Oscillator（OPO）测定KTP晶体折射率温度系数的实验方法。利用这种方法得到了KTP晶体折射率的温度系数。该方法具有操作简单、测量精度高和测量温度范围广等特点，并可用于其它多种非线性晶体折射率温度系数的测试。该系数对晶体的研究和晶体在非线性作用过程中的位相匹配有实际意义。
A method of investigating how refractive index of KTP crystal varied with temperature by using optical parametric oscillator was proposed. And we obtain the temperature derivative of the KTP. The process can be operated easily and with high precision, and wide measure range of temperature was achieved. Moreover, it can be used for studying various kind of crystal conveniently. The change of the refractive index with temperature may help us to investigate the crystal and the phase matching of it.
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