Broad Band Excimer Laser Induced Fluorescence Applied to Hypersonic and Supersonic Air Flows

1993 ◽  
pp. 245-253 ◽  
Author(s):  
F. Dionnet ◽  
J. Mouard ◽  
D. Puechberty
Keyword(s):  
Excimer Laser ◽  
Broad Band ◽  
Laser Induced Fluorescence ◽  
Air Flows

scholarly journals The Tunable, Narrow-Bandwidth Excimer Laser, the New Workhorse for Photochemistry in the UV and VUV

1983 ◽  
Vol 3 (1-6) ◽  
pp. 307-310
Author(s):  
K. Hohla ◽  
W. Mückenheim ◽  
D. Basting
Keyword(s):  
Excimer Laser ◽  
Broad Band ◽  
High Gain ◽  
Four Wave Mixing ◽  
Excimer Lasers ◽  
Spectral Brightness ◽  
Wave Mixing ◽  
Laser Transition ◽  
Linear Processes ◽  
Narrow Bandwidth

Excimer lasers are powerful sources of radiation in the UV, providing several laser lines between 157 and 353 nm. The excimer laser transition is bound-free, and thus the emitted wavelengths are broad-band (up to 200 cm−1). In addition the high gain (0.15 cm−1) of the laser gas causes a rather large divergence (>1 mrad) in conventional excimer lasers.A new excimer laser concept is described which improves the spectral brightness in terms of watt/(rad × bandwidth) by three orders of magnitude. This allows, through non-linear processes such as Raman shifting the fundamental output and four-wave-mixing in gases, the generation of new laser lines in the UV and VUV.

Argon Fluoride Laser-Excited Atomic Fluorescence of Arsenic in a H2/Air Flame and in an Ar ICP

1994 ◽  
Vol 48 (10) ◽  
pp. 1213-1217 ◽  
Author(s):  
D. Hueber ◽  
B. W. Smith ◽  
S. Madden ◽  
J. D. Winefordner
Keyword(s):  
Excimer Laser ◽  
Broad Band ◽  
Resonance Excitation ◽  
Atomic Fluorescence Spectrometry ◽  
Fixed Frequency ◽  
Atomic Fluorescence ◽  
Laser Systems ◽  
Arf Excimer Laser ◽  
Argon Fluoride ◽  
Sensitive Method

Laser-excited atomic fluorescence spectrometry (LEAFS) can be an extremely sensitive method of trace analysis. However, some elements, such as As, have strong absorption lines only below 200 nm. Dye laser systems capable of resonance excitation of As are complicated and very expensive. By coincidence, a simple fixed-frequency argon fluoride (ArF) excimer laser produces a broad-band output centered at 193.0–193.2 nm overlapping the As absorption line at 193.7 nm. The use of an ArF excimer laser as a source for LEAFS detection of As in a H2/air flame and an Ar-ICP has been evaluated. Detection limits of about 20 ng/mL were obtained with both atomizers. The limiting noise was laser-induced scatter in both cases. Methods of improving the detection powers are discussed.

Simultaneous monitoring of spectral and temporal Xe - Cl excimer laser-induced fluorescence

1996 ◽  
Vol 7 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Marigo Stavridi ◽  
Vasilis Z Marmarelis ◽  
Warren S Grundfest
Keyword(s):  
Excimer Laser ◽  
Laser Induced Fluorescence

Excimer Laser Photolysis of Organometallic Compounds Adsorbed on Substrates

1987 ◽  
Vol 101 ◽  
Author(s):  
Hideyuki Suzuki ◽  
Koji Mori ◽  
Masahiro Kawasaki ◽  
Hiroyasu Sato
Keyword(s):  
Excimer Laser ◽  
Organometallic Compounds ◽  
Laser Induced Fluorescence ◽  
Laser Photolysis ◽  
Excitation Wavelength ◽  
Temperature And Pressure

ABSTRACTExcimer laser photolysis at 248 nm of trimethylgal1ium (TMG) was studied by probing gallium atoms by laser induced fluorescence (LIF) technique. From the dependence of LIF intensity on the excitation wavelength, temperature and pressure, a thermally assisted photodissociation in the chemisorbed state was concluded.

scholarly journals XeCl excimer laser-induced fluorescence for selective ablation of atheromatous tissue.

1991 ◽  
Vol 55 (11) ◽  
pp. 1094-1105 ◽  
Author(s):  
KOH ARAKAWA ◽  
THEDORE PAPAZOGLOU ◽  
THANASSIS PAPAIOANNOU ◽  
WEI QIANG SHI ◽  
MICHAEL FISHBEIN ◽  
...  
Keyword(s):  
Excimer Laser ◽  
Laser Induced Fluorescence ◽  
Selective Ablation ◽  
Xecl Excimer Laser
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