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Development of Nonlinear Optical Waveguiding Devices for Second-Harmonic Generation of Laser Diode Light

用于激光二极管光二次谐波产生的非线性光波导器件的开发

基本信息

批准号：
63850012
负责人：
ITO Ryoichi
金额：
$ 12.74万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

1. Theoretical calculation of the molecular hyperpolarizabilities based on the quantum-chemical molecular orbital calculations and theoretical estimation of the second-order optical nonlinear coefficients based on the oriented-gas model were performed for a variety of organic crystals. A new screening-characterization procedure which includes the theoretical calculations was proposed. A characterization method using laser diodes as light sources was also newly developed.2. The Cerenkov-radiation-type second-harmonic generation from slab and fiber wave-guides was theoretically investigated. These theoretical analyses make it possible to optimize wave-guide parameters and to select the materials which is suitable for effective frequency doubling.3. A wave guide fabrication technique using solutions of organic materials was newly developed. A technique for fabrication of fine patterns (1. s. - 3mum) using organic crystals was also developed ; the water-soluble inorganic photoresist material HPA and O_2-RIE made it possible to fabricate organic crystals which were soluble in organic solvents. This new technique is expected to be applicable to almost all of organic materials.4. Blue light was obtained by second-harmonic generation in the form of Cerenkov radiation using organic wave-guides and laser diode sources. Focusing characteristics of the generated second-harmonic light was also investigated.We believe that these results greatly contribute to the development of the frequency doubling devices using organic nonlinear optical materials.

1. 对多种有机晶体进行了基于量子化学分子轨道计算的分子超极化率理论计算和基于取向气体模型的二阶光学非线性系数的理论估计。提出了一种新的筛选表征程序，其中包括理论计算。还新开发了一种利用激光二极管作为光源的表征方法。 2．从理论上研究了板条和光纤波导的切伦科夫辐射型二次谐波产生。这些理论分析使得优化波导参数和选择适合有效倍频的材料成为可能。 3．新开发了一种使用有机材料溶液的波导制造技术。还开发了一种使用有机晶体制造精细图案（1. s. - 3mum）的技术；水溶性无机光刻胶材料HPA和O_2-RIE使得制备可溶于有机溶剂的有机晶体成为可能。这项新技术有望适用于几乎所有的有机材料。4．使用有机波导和激光二极管源，通过切伦科夫辐射形式的二次谐波产生获得蓝光。还研究了产生的二次谐波光的聚焦特性。我们相信这些结果极大地有助于使用有机非线性光学材料的倍频器件的发展。