项目名称： 基于腔增强的直接光梳光谱及其应用的研究

项目编号： No.61505100

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张一弛

作者单位： 山西大学

项目金额： 21万元

中文摘要： 飞秒光学频率梳输出的激光同时具有模式锁定的超短脉冲和极宽光谱范围的特性使其在绝对频率的测量、光钟的发展和超精密光谱的获得等前沿的物理学研究领域具有非常广阔的前景。本项目旨在通过理论模拟腔增强直接光梳光谱，获得所需高精细腔的具体实验参数，应用理论模拟获得的实验参数搭建相关高精细光学腔并有效耦合宽带激光进入光学腔，建立关于分子痕量探测和原子分子动力学研究的腔增强直接光梳光谱系统。当探测原子和分子的系统具有微弱的振动强度或者这些样品中只有目标原子与分子的痕量被测量时，这种高灵敏的腔增强直接光梳光谱技术具有不可替代的优势。腔增强直接光梳光谱技术具有的优点：极大的光谱带宽可以观测许多不同原子和分子种类的几乎全部能级结构信息；高的光谱解析率可以用于识别和定量分析单个光谱的信息；高的灵敏度可以用于原子与分子的痕量分析和恢复微弱光谱的特性及研究其动力学演化学特征。

中文关键词： 宽带光谱；超精细能级；腔增强；直接光梳光谱；高分辨率相干操控

英文摘要： The phase-stabilized, wide-bandwidth frequency combs based on mode-locked femtosecond lasers has provided optical frequency markers that may be directly linked to optical or microwave standards. Many laboratories have since constructed frequency combs for a variety of exciting applications such as：measurements of absolute optical frequencies and precision laser spectroscopy, development of optical atomic clocks, optical frequency synthesis and broadband phase-coherent spectral generation, along with coherent synthesis of optical pulses, phase-sensitive extreme nonlinear optics and so on. Compared with the usual cavity enhanced spectroscopy with continuous light and broadband light absorption spectroscopy, this approach presents simultaneously the following attractive characteristics: The large spectral bandwidth allowing for the observation of global energy level structure of many different atomic and molecular species; High spectral resolution for the identification and quantitative analysis of individual spectral features; High sensitivity for detection of trace amounts of atoms or molecules and for recovery of weak spectral features and a fast spectral acquisition time, which takes advantage of high sensitivity for the study of dynamics. Because of its high sensitivity, cavity-enhanced Direct frequency comb spectroscopy is useful when investigating atomic and molecular systems that have weak oscillator strengths, or in cases where only a trace amount of the target atom or molecule is present.

英文关键词： Broad bandwidth spectroscopy;Hyperfine structure level;Cavity enhanced;Direct frequency comb spectroscopy;High-Resolution Coherent Control