Evaluation of third order nearly resonant optical nonlinearity of dye-doped films

染料掺杂薄膜的三阶近共振光学非线性评估

• 批准号: 04650032
• 负责人: FUJIWARA Hirofumi
• 金额: $ 1.28万
• 依托单位: Muroran Institure of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650032/
• 关键词: suturabele absorption; photoinduced anisotropy; azo dyes; xanthene dyes; optical phase conjugation; two-wave mixing; Z走査法; アクリジンオレンジ; 有機色素膜; メチルオレンジ; 3次の非線形光学; 3次の非線形感受率

As dye-doped polymer films can be easily prepared and nonlinear optical phenomena are observed at relatively low powers of cw lasers, they are applied for optical information processings. It is desirable to develop the simple evaluation of the nearly resonant optical nonlinearity of dye-doped films.We evaluated the third order nonlinear susceptibility of the dye-doped films with several measuring methods of (1) the transmittance as a function of the pump powers of the plane beam and the Gaussian beam (z-scanning method), (2) self diffraction by nearly degenerate two-wave mixing (moving grating method) and (3) phase conjugate interferometry with a standard phase conjugator by degenerate four-wave mixing.The method of measuring the pump-transmittance is a simple one and applicable for the evaluation of the imaginary part of the third order susceptibility. We believe that the most suitable method is the moving grating one which is applied for real and imaginary parts of the third order susceptibility. The higher S/N measurement is expected to improve the weak signal detection. The usefulness of the phase conjugate interferometry is under study. For the dye-doped films with large absorbance, the z-scanning method is weak in the simplicity of the evaluation of the optical nonlinearity.

由于染料掺杂聚合物薄膜易于制备，且在较低的连续激光功率下即可观察到非线性光学现象，因此在光学信息处理领域有着广泛的应用。本文采用几种测量方法对染料掺杂薄膜的三阶非线性系数进行了测量：（1）透射率与平面光束和高斯光束泵浦功率的关系（z扫描方法），（2）近简并二波混频的自衍射（3）利用简并四阶相位共轭器的相位共轭干涉法，测量泵浦透过率的方法简单，适用于三阶极化率虚部的计算。我们认为最合适的方法是移动光栅法，它适用于三阶极化率的真实的实部和虚部。期望更高的S/N测量来改善弱信号检测。相位共轭干涉测量法的实用性正在研究之中。对于吸收率较大的染料掺杂薄膜，z扫描法在评价光学非线性的简便性方面存在不足。

项目成果

H.Fujiwara and K.Nakagawa: "Optical materials for optical phase conjugation (in Japanese)" Koubunnshi. 41. 642-645 (1992)

H.Fujiwara 和 K.Nakakawa：“用于光学相位共轭的光学材料（日语）”Koubunnshi。

C.Egami,K.Nakagawa,and H.Fugiwara: "Efficient optical phase conjugation in methyl-orange-doped polyvinyl lcohol film" Jpn.J.Appl.Rhys.31. 2937-2940 (1992)

C.Egami、K.Nakakawa 和 H.Fugiwara：“甲基橙掺杂聚乙烯醇薄膜中的高效光学相位共轭”Jpn.J.Appl.Rhys.31。

C.Egami, K.Nakagawa and H.Fujiwara: "Efficient optical phase conjugation in methl-orange-doped polyvinl alcohol film." Jpn.J.Appl.Phys. 31. 2937-2940 (1992)

C.Egami、K.Nakakawa 和 H.Fujiwara：“甲基橙掺杂聚乙烯醇薄膜中的高效光学相位共轭。”

藤原 裕文: "情報と光物理-ホログラフィから位相共役光学まで-" 「情報光学」-光技術の新展開をめざして-サマーセミナー. 第29回. 1-26 (1992)

Hirofumi Fujiwara：“信息和光学物理 - 从全息术到相位共轭光学 -”“信息光学” - 瞄准光学技术的新发展 - 夏季研讨会 1-26（1992 年）。

M.Sato, M.Hayakawa, K.Nakagawa, K.Mukaida and H.Fujiwara: "Synthesis and properties of polyesters having cyanoazobenzene units in the side chain" Macromol.Rapid Commun.15. 21-29 (1994)

M.Sato、M.Hayakawa、K.Nakakawa、K.Mukaida 和 H.Fujiwara：“侧链具有氰基偶氮苯单元的聚酯的合成和性能” Macromol.Rapid Commun.15。