Development of extreme-ultraviolet tunable coherent source

极紫外可调谐相干光源的研制

• 批准号: 02555012
• 负责人: MAEDA Mitsuo
• 金额: $ 7.1万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555012/
• 关键词: Stimulated Raman Scattering; Dys Laser; Nonlinear Optics; Tunable Laser; Resonant Four-Wave Mixing; Extreme Ultraviolet; Laser Spectroscopy; 色素レ-ザ-; 可変波長レ-ザ-; 四光子混合; レ-ザ-分光

Frequency up-conversion of tunable lasers using the 3rd order nonlineality in gaseous medium, is very useful for laser spectroscopy in the VUV and XUV region. The final target of this project is to extend the tunable range over 72nm where there was no tunable source. We proposed the following method to realize this : 1) two-photon resonant four-wave mixing between tunable ArF and dye lasers, and 2) resonant four-wave mixing between Raman shifted lines of them. Results of the project during these 3years are summarized as follows.1) Efficient resonant third harmonic generation of ArF laser was obtained at 64nm with hydrogen gas jet, when the laser wavelength was tuned on a two-photon resonant line.2) Then, by the mixing of dye laser beam with it, continuously tunable XUV coherent radiation down to 66nm was generated. This is the shortest wavelength record of tunable laser up to now.3) Resonant four-wave mixing between ArF laser and the Raman-shifted lines was generated. However, shorter wavelength generation by ante-Stokes lines has not yet observed. We are developing a short-pulse high -power Ti:sapphire laser to extend the tunable range shorter.

利用气体介质中的三阶非线性效应实现可调谐激光器的频率上转换，在真空紫外和极紫外波段的激光光谱学研究中具有重要意义。本项目的最终目标是在没有可调谐光源的情况下将可调谐范围扩展到72 nm以上。我们提出了如下方法：1）ArF和染料激光器之间的双光子共振四波混频; 2）它们的拉曼位移线之间的共振四波混频。主要研究成果如下：1）利用氢气射流，在双光子共振线上调谐ArF激光，获得了64 nm的高效共振三次谐波输出; 2）与染料激光混合，获得了66 nm的连续可调谐XUV相干辐射。这是迄今为止可调谐激光器的最短波长记录。3）ArF激光与喇曼位移线之间产生了共振四波混频。然而，尚未观察到由反斯托克斯线产生的更短波长。我们正在研制一种短脉冲高功率钛宝石激光器，以扩大调谐范围更短。

项目成果

高橋 昭彦 他: "可変波長コヒ-レント光源の極端紫外域への拡張" 九州大学工学集報. 63. 649-654 (1990)

Akihiko Takahashi 等人：“将可调谐相干光源扩展到极紫外区域”九州大学工程通报 63. 649-654 (1990)。

Yasuyuki Hirakawa他: "Generation of tunable coherent XUV radiation down to 66nm by resonant four-wave mixing" Optics Letters.

Yasuyuki Hirakawa 等人：“通过谐振四波混频生成低至 66 nm 的可调谐相干 XUV 辐射”《光学快报》。

Yasuyuki HIRAKAWA他: "Generation of coherent XUV radiation by tow-photon resonant four-wave mixing combinde with stimulated Raman scattering" Optics Communications. 92. 215-218 (1992)

Yasuyuki HIRAKAWA 等人：“通过双光子共振四波混合与受激拉曼散射相结合产生相干 XUV 辐射”光学通讯。 92. 215-218 (1992)

Yasuyuki Hirakawa et al.: "Generation of Tunable Coherent XUV Radiation in a Hydrogen Jet by Two-Photon Resonant Four-Wave Mixing" Optics Communications. Vol.84. 365-368 (1992)

Yasuyuki Hirakawa 等人：“通过双光子谐振四波混合在氢气喷射中产生可调谐相干 XUV 辐射”光学通信。

Yasuyuki Hirakawa et al.: "Generation of coherent XUV radiation by two-photon resonant four-wave mixing combined with stimulated Raman scattering" Optics Communications. Vol.92. 215-218 (1992)

Yasuyuki Hirakawa 等人：“通过双光子共振四波混合与受激拉曼散射相结合产生相干 XUV 辐射”光学通讯。