Topological lightwave synthesis based on plasma hologram

基于等离子体全息图的拓扑光波合成

• 批准号: 23656041
• 负责人: OMATSU Takashige
• 金额: $ 2.5万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656041/
• 关键词: レーザー; 非線形光学; 特異点光学; プラズマ光学; 高強度レーザー

We performed forward four-wave mixing in plasma created by highly intense optical vortex, so as to transfer the total angular momentum of the optical vortex to the diffracted beam. A laser used was a picosecond Nd:YAG laser (wavelength : 1064nm, pulse width : 20ps, pulse energy : 1~5mJ), and its output was converted to optical vortex with a total angular momentum of 1 by a spiral phase plate. The optical vortex and its reference pulses were spatially overlapped on a target silica glass, thereby forming the plasma grating. Self-diffracted output with an annular intensity profile was then observed. Furthermore, self-diffracted output energy was almost proportional to the cube of the optical vortex energy. These results evidenced that the total angular momentum was transferred from the optical vortex to the diffracted output through four-wave mixing process in plasma grating.

我们在强光涡旋产生的等离子体中进行了前向四波混频，将光涡旋的角动量转移到衍射光束中。所用激光器为皮秒Nd：YAG激光器（波长：1064 nm，脉宽：20 ps，脉冲能量：1~ 5 mJ），其输出通过螺旋相位板转换为总角动量为1的光涡旋。光涡旋及其参考脉冲在目标石英玻璃上空间重叠，从而形成等离子体光栅。然后观察到具有环形强度分布的自衍射输出。此外，自衍射输出能量几乎与光涡旋能量的立方成正比。这些结果表明，在等离子体光栅中，总角动量通过四波混频过程从光涡旋转移到衍射输出。

项目成果

光波の全角運動量を用いたナノプロセッシング

使用光波总角动量的纳米处理

• 发表时间: 2012
• 作者: 尾松孝茂;森田隆二
• 通讯作者: 森田隆二

Tunable 2-μm optical vortex parametric oscillator.

• DOI: 10.1364/oe.20.023666
• 发表时间: 2012-10
• 期刊: Optics express
• 影响因子: 3.8
• 作者: T. Yusufu;Y. Tokizane;M. Yamada;K. Miyamoto;T. Omatsu

光渦レーザーが拓く新しいナノプロセッシング

光学涡旋激光器开创的新型纳米加工

• 发表时间: 2013
• 作者: 大坪望;生駒大祐;青木貴稔;鳥井寿夫;笹原 亮;森田隆二,戸田泰則,尾松孝茂;尾松孝茂
• 通讯作者: 尾松孝茂

Dual-frequency picosecond optical parametric generator pumped by a Nd-doped vanadate bounce laser

• DOI: 10.1364/oe.19.018523
• 发表时间: 2011-09-12
• 期刊: OPTICS EXPRESS
• 影响因子: 3.8
• 作者: Koichi, M.;Miyamoto, K.;Omatsu, T.
• 通讯作者: Omatsu, T.

Nanosecond vortex laser pulses withmillijoule pulse energies from an Yb-doped double-clad fiber power amplifier

来自掺镱双包层光纤功率放大器的纳秒涡旋激光脉冲，具有毫焦耳脉冲能量

• 发表时间: 2011
• 期刊: Opt. Express
• 作者: Mio Koyama;Hirose Tetsuya;Masahito Okida;Katsuhiko Miyamoto;Takashige Omatsu
• 通讯作者: Takashige Omatsu