Optimization of Manufacturing Process of Waveguides on Nonlinear Optical Polymer film

非线性光学聚合物薄膜波导制造工艺优化

• 批准号: 11650772
• 负责人: TSUKADA Takao
• 金额: $ 1.73万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650772/
• 关键词: Nonlinear Optical Polymer; Periodic Domain Inversion; Photothermal poling process; Waveguide; DR1-PMMA; Rotational Diffusion Coefficient; Mathematical Model; 擬似位相整合; 波長変換; 数値シミュレーション

Numerical simulations of the manufacturing of waveguides with grating patterns on a nonlinear optical (NLO) polymer film using photothermal poling were carried out The mathematical model was constructed, in which spatial and temporal variations of molecular dipoles during heating with a focused laser beam and electrical poling were considered. The effects of operational factors, i.e., laser power, beam diameter, moving speed of a sample, and electric field strength, on the grating configuration were investigated. As a result, the following guidelines for producing a waveguide with high performance were obtained : the laser beam wavelength should be selected so as to heat uniformly throughout the thickness of the polymer film, the laser power should be as high as possible without causing large deformation in the film, the laser beam diameter should be smaller than half period of the grating, the moving speed of the stage should be slow, and the electric field strength should be as high as possible, if dielectric breakdown is to be avoided.In addition, measurements of the rotational diffusion coefficient and the thermal diffusivity of poly (methyl methacrylate) with Disperse Red 1 (DR1) chromophore side groups were carried out.

利用光热极化技术在非线性光学聚合物薄膜上制备光栅波导，建立了考虑激光聚焦加热和电极化过程中分子偶极子的时空变化的数学模型。研究了激光功率、光束直径、样品移动速度和电场强度等操作因素对光栅结构的影响。因此，获得了生产高性能波导的以下准则：选择激光束波长应使整个聚合物薄膜的厚度均匀受热，激光功率应尽可能高而不引起薄膜的大变形，激光束直径应小于光栅的半周期，阶段的移动速度应慢，电场强度应尽可能高，以避免介电击穿。此外，还测定了具有分散红1 （DR1）发色团侧基的聚甲基丙烯酸甲酯的旋转扩散系数和热扩散系数。

项目成果

Hiroaki Kobayashi et.al.: "Measurement of Thermal Diffusivity of Nonlinear Optical Polymer Thin Films Using Photoacoustic Method"JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. Vol.33 No.6. 918-922 (2000)

Hiroaki Kobayashi 等人：“使用光声法测量非线性光学聚合物薄膜的热扩散率”日本化学工程学报。

Hiroaki KOBAYASHI et.al.: "Measurement of thermal Diffusivity of Nonlinear Optical Polymer Thin films Using Photoacoustic Method"JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. Vol.33,No.6. 918-922 (2000)

Hiroaki KOBAYASHI 等人：“使用光声法测量非线性光学聚合物薄膜的热扩散率”日本化学工程杂志。