Flow imaging by use of femtosecond-laser-induced two-photon fluorescence

被引：8
|
作者：
Kelman, JB [1 ]
Greenhalgh, DA
Ramsay, E
Xiao, D
Reid, DT
机构：
[1] Cranfield Univ, Cranfield MK43 0AL, Beds, England
[2] Heriot Watt Univ, Sch Engn & Phys Sci, Ultrafast Opt Grp, Edinburgh EH14 4AS, Midlothian, Scotland
来源：
OPTICS LETTERS | 2004年 / 29卷 / 16期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1364/OL.29.001873
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel technique is demonstrated for the imaging of turbulent flows in which a single window to the flow is the only optical access required. A femtosecond laser is used to excite two-photon fluorescence in a disodium-fluorescein-seeded water jet. The fluorescence signal is generated at only the focal point of the laser because of the highly nonlinear nature of the two-photon absorption, and it is collected in a direction counterpropagating to the excitation beam. Tight focusing of the laser is used to limit the probe volume, and the two-dimensional mean and rms concentration images are collected by raster scanning the laser. (C) 2004 Optical Society of America.
引用
收藏
页码：1873 / 1875
页数：3
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