基于1兆赫兹镱激光器的无背景宽带相干反斯托克斯拉曼光谱学

Background-free broadband CARS spectroscopy from a 1-MHz ytterbium laser.

作者信息

Kumar Vikas, Osellame R, Ramponi R, Cerullo G, Marangoni M

机构信息

IFN-CNR and Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.

出版信息

Opt Express. 2011 Aug 1;19(16):15143-8. doi: 10.1364/OE.19.015143.

DOI:10.1364/OE.19.015143

PMID:21934875

Abstract

We introduce a novel configuration for broadband, time-resolved CARS spectroscopy/microscopy in which pump, Stokes and probe pulses are all derived from a single femtosecond Yb:KYW laser. The 1-MHz repetition rate of the system allows very intense CARS signals to be obtained over short acquisition times, while a delayed probe pulse ensures an efficient non-resonant background suppression.

摘要

我们介绍了一种用于宽带、时间分辨相干反斯托克斯拉曼散射（CARS）光谱学/显微镜的新型配置，其中泵浦光、斯托克斯光和探测光脉冲均来自单个飞秒镱：钇钽酸钾（Yb:KYW）激光器。该系统1MHz的重复频率使得在短采集时间内就能获得非常强的CARS信号，同时延迟的探测光脉冲可有效抑制非共振背景。