Establishment of Molecular Light Modulation and its Application to Ultrashort Pulse Generation

分子光调制的建立及其在超短脉冲产生中的应用

• 批准号: 15340130
• 负责人: KATSURAGAWA Masayuki
• 金额: $ 10.37万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340130/
• 关键词: Raman; Stimulated Raman Scattering; Adiabatic; Modulation; Sideband; Coherence; Hydrogen; Molecule

This project aimed realization of a novel ultrashort pulse laser by using a coherently-oscillating high-density molecular-ensemble as an ultrahigh-frequency light-modulator.We summarize the main points of the achievments for this three-years-project.1.Realization of ultrahigh frequency light-modulator at both 125THz (vibration) and 10THz (rotation) (This is equivalent to the realization of near-maximal coherence state such that all the molecules coherently oscillate.)2.Generation of ultrabroad Raman sidebands which extends from near vacuum ultraviolet to infrared with a frequency width of 〜70,000cm^<-1>(〜2,100 PHz)3.Generation of a train of 10-fs ultrashort pulses at ultrahigh repetition-rate of 10-THz with high stability as an actual light source by controlling the spectral phases of the broad Raman sidebands. This result is quantitatively evaluated based on a well-established pulse measurement technique, second-harmonic-generation autocorrelation.

本课题旨在利用相干振荡的高密度分子系综作为超高频光调制器实现一种新型的超短脉冲激光器，本文总结了本课题三年来的主要研究内容：1.实现125THz和125THz两个频率的超高频光调制器（振动）和10 THz（旋转）（这相当于实现近最大相干态，使得所有分子相干振荡。2.产生了从近真空紫外到红外的超宽拉曼边带，其频率宽度为1070000cm ^<-1>（102100PHz）。3.通过控制宽拉曼边带的光谱相位，产生了重复频率为10THz的10 fs超短脉冲串，作为实际光源具有很高的稳定性。这一结果是定量评估的基础上建立一个完善的脉冲测量技术，二次谐波产生自相关。

项目成果

Dual-wavelength injection-locked pulsed laser

• DOI: 10.1364/ol.30.002421
• 发表时间: 2005-09-15
• 期刊: OPTICS LETTERS
• 影响因子: 3.6
• 作者: Katsuragawa, M;Onose, T
• 通讯作者: Onose, T

Generation of a 10.6-THz ultrahigh-repetition-rate train by synthesizing phase-coherent Raman-sidebands.

• DOI: 10.1364/opex.13.005628
• 发表时间: 2005-07
• 期刊: Optics express
• 影响因子: 3.8
• 作者: M. Katsuragawa;K. Yokoyama;T. Onose;K. Misawa