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Application of novel polarization handling elements into functional devices and optical systems

新型偏振处理元件在功能器件和光学系统中的应用

基本信息

批准号：
08455169
负责人：
KAWAKAMI Shojiro
金额：
$ 4.99万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

1.Operation speeds improvement of the liquid crystal polarization converters and their application to the gain-compensation of semiconductor optical amplifiers :In order to improve the response speed of the liquid crystal rotatable waveplates which we have developed, two experimental trials were carried out simultaneously : one is to increase the driving voltage of the device, and the other is to use Ferroelectric-type LC material. As a result of experiment, both of them could successfully increase the response speed up to about 9 times compared to what has been studied. It was also found that the former type is superior to the latter type from the viewpoint of the operation stability.2.Integration of liquid crystal functional devices into polymer waveguides :In general, optical waveguides made of organic materials such as polymers are easier to fabricate than silica-based ones as they require lower temperature throughout the fabrication process. Therefore, by combining liquid crystals with these organic waveguides, it will be possible to realize various low-cost functional devices such as polarization converters, switches, branching devices, and so on. In this work, we have developed several novel LC integration techniques into the polymer waveguides, which includes the formation of a cavity with a scale of 10 mum in the middle of the core of the waveguide. According to the result of a preliminary experiment, it was verified that such polymer-integrated LC device could have polarization converting functions.

1.提高液晶偏振转换器的工作速度及其在半导体光放大器增益补偿中的应用：为了提高我们研制的液晶可旋转波片的响应速度，同时进行了两个实验：一个是提高器件的驱动电压，另一个是使用铁电型液晶材料。作为实验的结果，他们都可以成功地提高响应速度高达约9倍相比，已经研究。从工作稳定性的角度来看，前一种类型上级后一种类型。2.液晶功能器件与聚合物波导的集成：一般来说，由聚合物等有机材料制成的光波导比硅基光波导更容易制造，因为它们在整个制造过程中需要更低的温度。因此，通过将液晶与这些有机波导相结合，将有可能实现各种低成本的功能器件，如偏振转换器，开关，分支设备，等等。在这项工作中，我们已经开发了几种新的LC集成技术到聚合物波导，其中包括形成一个腔的规模为10微米的波导的核心的中间。根据初步实验的结果，证实了这种聚合物集成LC器件可以具有偏振转换功能。