Hybrid femtosecond/picosecond rotational coherent anti-Stokes Raman scattering at flame temperatures using a second-harmonic bandwidth-compressed probe

被引：61

作者：

Kearney, Sean P. ^{[1
]}

Scoglietti, Daniel J. ^{[1
]}

机构：

[1] Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA

来源：

OPTICS LETTERS | 2013年 / 38卷 / 06期

基金：

美国能源部;

关键词：

GAS-PHASE THERMOMETRY; SHOT;

D O I：

10.1364/OL.38.000833

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate an approach for picosecond probe-beam generation that enables hybrid femtosecond/picosecond pure-rotational coherent anti-Stokes Raman scattering (CARS) measurements in flames. Sum-frequency generation of bandwidth-compressed picosecond radiation from femtosecond pumps with phase-conjugate chirps provides probe pulses with energies in excess of 1 mJ that are temporally locked to the femtosecond pump/Stokes preparation. This method overcomes previous limitations on hybrid femtosecond/picosecond rotational CARS techniques, which have relied upon less efficient bandwidth-reduction processes that have generally resulted in prohibitively low probe energy for flame measurements. We provide the details of the second-harmonic approach and demonstrate the technique in near-adiabatic hydrogen/air flames. (C) 2013 Optical Society of America

引用

页码：833 / 835

页数：3

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