Research on liquid crystal optical control devices directly integrated into optical fibers

(1)液晶偏振控制器的实现(i)可旋转波片的设计与制作工艺的发展开发了可旋转波片的制作技术，实现了旋转响应时间小于4 msec，损耗小于0.1 dB。实际偏振波动周期小于几秒或几分钟，因此可以进行偏振补偿。（二）总技术的建立可旋转波片有八个电极。每个电极被施加不同的电压。计算机控制的驱动器是可用的，光学电路的反馈也制作。（三）极化控制的验证验证了极化控制的功能。经验证，该偏振转换为线性偏振，线性度为13 dB。(2)光学可调滤波器的分析从理论上分析了液晶波长选择滤波器的谐振模指数特性，阐明了其来源和特性。

(1) Realization of polarization controller using liquid crystal(i) Design of rotatable waveplates and development of fabrication processFabrication technology of rotatable waveplates are developed and the response time of rotation less than 4 msec and the loss less than 0.1 dB arerealized. Actual period of fluctuation of polarization is less than a few second or a few minute so compensation of polarization is available.(ii) Establishment of total technologyThe rotatable waveplate has eight electrodes. Each electrode is applied various voltage. Computer-controlled drive is available and optical circuits for feedback are also fabricated.(iii) Verification of polarization controlThe function of polarization control is verified. It is verified that the polarization is translated to linear polarization with linearity of 13 dB.(2) Analysis of optical tunable filterSpecific behavior of the resonance mode index is theoretically analyzed for wavelength-selective filter using liquid crystal and the origin and the characteristics are clarified.