中国激光, 2013, 40 (7): 0708004, 网络出版: 2013-06-07   

法布里珀罗谐振技术测量PMNT的电光系数及在衍射光栅中的应用

Fabry-Perot Resonant Technique for Measuring the Electro-Optic Coefficients of PMNT Ceramic and Its Application in Diffraction Grating
作者单位
1 中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室, 上海 201800
2 中国科学院大学, 北京 100049
摘要
阐述了一种用法布里珀罗(FP)谐振技术来测量新型铌镁酸铅钛酸铅(PMNT)透明电光陶瓷不同偏振光场矢量下二次电光系数的方法。PMNT透明电光陶瓷具有较大的折射率,非常容易形成FP谐振腔。根据陶瓷二次电光效应,PMNT在FP谐振腔内的谐振波长随着外加电压的升高而移动。改变入射光光场矢量的偏振状态,可以获得横电(TE)模式和横磁(TM)模式的二次电光系数γ33 和γ13分别约为21.06×10-16 m2/V2和-1.76×10-16 m2/V2,这明显不同于常规的线性电光晶体。利用这个特征,在实验上设计了一个PMNT电控衍射光栅,对不同TE模和TM模衍射图样进行了分析,证实了研究结果的正确性。
Abstract
A Fabry-Perot (FP) resonant technique is proposed to measure the quadratic electro-optic coefficients γ33 and γ13 of transparent lead magnesium niobate titanate (PMNT) ceramic for transverse electric (TE) and transverse magnetic (TM) modes. The resonant wavelength in the PMNT FP resonant cavity will shift with the increase of applied voltage due to the quadratic electro-optic effect. The quadratic electro-optic coefficients γ33 and γ13 for TE and TM modes are measured, and their values are about 21.06×10-16 m2/V2 and -1.76×10-16m2/V2, respectively. Using the characteristic, a polarization-dependent PMNT electro-optic diffraction grating is designed and the diffraction patterns for different polarization light are also analyzed and compared in detail.
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张学娇, 叶青, 蔡海文, 瞿荣辉. 法布里珀罗谐振技术测量PMNT的电光系数及在衍射光栅中的应用[J]. 中国激光, 2013, 40(7): 0708004. Zhang Xuejiao, Ye Qing, Cai Haiwen, Qu Ronghui. Fabry-Perot Resonant Technique for Measuring the Electro-Optic Coefficients of PMNT Ceramic and Its Application in Diffraction Grating[J]. Chinese Journal of Lasers, 2013, 40(7): 0708004.

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