飞秒激发的羟基（OH）自由基的激光诱导荧光检测。

Laser-induced fluorescence detection of hydroxyl (OH) radical by femtosecond excitation.

机构信息

Spectral Energies, LLC, 5100 Springfield Street, Suite 301, Dayton, Ohio 45431, USA.

出版信息

Opt Lett. 2011 May 15;36(10):1776-8. doi: 10.1364/OL.36.001776.

DOI:10.1364/OL.36.001776

Abstract

The development of a laser-induced fluorescence detection scheme for probing combustion-relevant species using a high-repetition-rate ultrafast laser is described. A femtosecond laser system with a 1 kHz repetition rate is used to induce fluorescence, following two-photon excitation (TPE), from hydroxyl (OH) radicals that are present in premixed laminar flames. The experimental TPE and one-photon fluorescence spectra resulting from broadband excitation into the (0,0) band of the OH A(2)∑(+)-X(2)Π system are compared to simulated spectra. Additionally, the effects of non-transform-limited femtosecond pulses on TPE efficiency is investigated.

摘要

描述了一种使用高重复率超快激光探测与燃烧相关物质的激光诱导荧光检测方案。采用重复频率为 1 kHz 的飞秒激光系统，通过双光子激发（TPE），从预混层流火焰中存在的羟基（OH）自由基中诱导荧光。将宽带激发到 OH A(2)∑(+)-X(2)Π 体系的（0,0）带的实验 TPE 和单光子荧光光谱与模拟光谱进行了比较。此外，还研究了非变换限制飞秒脉冲对 TPE 效率的影响。