利用反向传播飞秒脉冲进行高精度光谱学研究。

High-precision spectroscopy with counterpropagating femtosecond pulses.

机构信息

Department of Physics and Astronomy, LaserLaB, VU University, de Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.

出版信息

Phys Rev Lett. 2013 Jul 12;111(2):023007. doi: 10.1103/PhysRevLett.111.023007. Epub 2013 Jul 9.

DOI:10.1103/PhysRevLett.111.023007

Abstract

An experimental realization of high-precision direct frequency comb spectroscopy using counterpropagating femtosecond pulses on two-photon atomic transitions is presented. The Doppler broadened background signal, hampering precision spectroscopy with ultrashort pulses, is effectively eliminated with a simple pulse shaping method. As a result, all four 5S-7S two-photon transitions in a rubidium vapor are determined with both statistical and systematic uncertainties below 10(-11), which is an order of magnitude better than previous experiments on these transitions.

摘要

本文提出了一种基于双光子原子跃迁的反向飞秒脉冲高精度直接频率梳光谱学实验实现方案。通过一种简单的脉冲整形方法，有效地消除了超短脉冲精密光谱学中受到多普勒展宽背景信号的干扰。实验结果表明，铷原子蒸气中的所有四个 5S-7S 双光子跃迁，其统计和系统不确定度均低于 10(-11)，这一精度比之前关于这些跃迁的实验提高了一个数量级。