Stimulated Raman gas sensing by backward UV lasing from a femtosecond filament

被引：67

作者：

Malevich, P. N. ^{[1
]}

Maurer, R. ^{[1
]}

Kartashov, D. ^{[1
,2
]}

Alisauskas, S. ^{[1
]}

Lanin, A. A. ^{[3
]}

Zheltikov, A. M. ^{[3
,4
]}

Marangoni, M. ^{[5
]}

Cerullo, G. ^{[5
]}

Baltuska, A. ^{[1
,6
]}

Pugzlys, A. ^{[1
,6
]}

机构：

[1] TU Wien, Photon Inst, A-1040 Vienna, Austria

[2] Univ Jena, D-07743 Jena, Germany

[3] Moscow MV Lomonosov State Univ, Phys Dept, Moscow 119992, Russia

[4] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[5] Politecn Milan, IFN CNR, Dipartimento Fis, I-20133 Milan, Italy

[6] Ctr Phys Sci & Technol, LT-02300 Vilnius, Lithuania

来源：

OPTICS LETTERS | 2015年 / 40卷 / 11期

基金：

俄罗斯科学基金会; 欧洲研究理事会; 奥地利科学基金会; 俄罗斯基础研究基金会;

关键词：

SCATTERING;

D O I：

10.1364/OL.40.002469

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We perform a proof-of-principle demonstration of chemically specific standoff gas sensing, in which a coherent stimulated Raman signal is detected in the direction anticollinear to a two-color laser excitation beam traversing the target volume. The proposed geometry is intrinsically free space as it does not involve back-scattering (reflection) of the signal or excitation beams at or behind the target. A beam carrying an intense mid-IR femtosecond (fs) pulse and a parametrically generated picosecond (ps) UV Stokes pulse is fired in the forward direction. A fs filament, produced by the intense mid-IR pulse, emits a backward-propagating narrowband ps laser pulse at the 337 and 357 nm transitions of excited molecular nitrogen, thus supplying a counter-propagating Raman pump pulse. The scheme is linearly sensitive to species concentration and provides both transverse and longitudinal spatial resolution. (C) 2015 Optical Society of America

引用

页码：2469 / 2472

页数：4

共 20 条

[1] 90 GW peak power few-cycle mid-infrared pulses from an optical parametric amplifier [J].