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

直接集成到光纤中的液晶光控器件研究

• 批准号: 06452238
• 负责人: KAWAKAMI Shojiro
• 金额: $ 4.74万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452238/
• 关键词: polarization controller; rotatable waveplate; liquid crystal; optical filter; LPS; 液晶セル; TECファイバ; チューナブル光フィルタ

(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.

(1)利用液晶实现偏振控制器（i）可旋转波片的设计和制作工艺的发展研究了可旋转波片的制作工艺，实现了旋转响应时间小于4msec，损耗小于0.1dB。实际的偏振波动周期小于几秒或几分钟，因此可以进行偏振补偿。(ii)总体技术的建立可旋转波板有八个电极。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，并制作了用于反馈的光学电路。(iii)偏振控制功能验证偏振控制功能验证。验证了偏振转换为线性偏振，线性度为13 dB。(2)光学可调谐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折射率特性，阐明了其来源和特点。

项目成果

Takashi Sato: "Scattering mechanism and reducing insection loss in a laminated polaization splitter" Applied Optics. 33. 6925-6934 (1994)

Takashi Sato：“层压偏振分光器中的散射机制和减少截面损失”应用光学。

Y.Ohtera: "Liquid crystal rotatable waveplates" IEEE Photonics Technology Letters. 8. (1996)

Y.Ohtera：“液晶可旋转波片”IEEE 光子技术快报。

Y.Ohtera: ""liquid crystal rotatable waveplates"" IEEE Photonics Technology Letters. Vol. 8. (1996)

Y.Ohtera：““液晶可旋转波片””IEEE 光子技术快报。

松田淳一: "Ge超薄膜をもつ短波長用積層型偏光子と境界層の検討" 電子情報通信学会論文誌C-1. J77-C-1. 727-733 (1994)

Junichi Matsuda：“具有超薄 Ge 薄膜和边界层的短波长多层偏振器的研究”IEICE Transactions J77-C-1 (1994)。

川上彰二郎: "ヴァーティカルフオトニクスと光スイッチ・光制御" 光学. 24. 318-323 (1995)

Shojiro Kawakami：“垂直光子学、光开关和光控制”光学。 24. 318-323 (1995)