Optical characteristics of transparent PMNT ceramic and its application at high speed electro-optic switch,
Optical characteristics of transparent PMNT ceramic and its application at high speed electro-optic switch,
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DOI：
10.1016/j.optcom.2011.04.063
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发表时间：
2011-08
影响因子：
2.4
通讯作者：
Lei Qiao;Q. Ye;J. Gan;H. Cai;R. Qu
中科院分区：
文献类型：
--
作者：
Lei Qiao;Q. Ye;J. Gan;H. Cai;R. Qu
研究了PMNT透明电光陶瓷的光学特性，包括电光相位调制、电滞特性和热光系数。在此基础上，利用光纤Sagnac干涉仪（FSI）结构实现了偏振无关电光开关。在Sagnac环中引入初始π位移，以消除入射光偏振方向对开关性能的影响。然后，使用电控PMNT相位延迟器在反射端口和传输端口之间切换光信号。理论分析了该开关的热特性和不同的开关频率响应。
The optical characteristics of transparent lead magnesium niobate titanate (PMNT) electro-optic ceramic, including the electro-optic phase modulation, electric hysteresis property and thermo-optic coefficient, are investigated in detail. Based on this novel ceramic, a polarization independent electro-optic switch by using fiber Sagnac interferometer (FSI) structure is realized. An initialπ-shift is introduced into the Sagnac loop to eliminate the effect of the polarization orientation of the incident light on the switch performance. Then an electrically controllable PMNT phase retarder is used to switch the optical signal between the reflection and transmission ports. Some theoretical analyses are given and the switch performances are also discussed, including the thermal characteristic and different switching frequency response.