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OBAVESTENJE
Obavestavamo sve zainteresovane da ce se na
Institutu za fiziku u Zemunu, Pregrevica 118,
u okviru redovnih aktivnosti Projekta MNTRS 1424,
odrzati dva predavanja.
Predavac je:
Prof. Dr. Markus W. Sigrist
ETH
Zurich
Institute of Quantum Electronics
Laboratory for Laser
Spectroscopy
and Environmental Sensing
Hoenggerberg HPF D19
CH-8093
Zurich
Switzerland
1. Prvo predavanje je u ponedeljak 18.11.2002. godine, u sali 10, sa pocetkom u 12.30
"Gas Sensing with Tunable Lasers"
2. Drugo predavanje je u utorak 19.11.2002. godine, u sali 10, sa pocetkom u
12.30
"Trace Gas Analysis using Infrared Laser
Spectroscopy"
Predavanja ce se odrzati u sklopu posete profesora
Sigrista Institutu za fiziku u Zemunu, Laboratoriji za atomsku, molekulsku i
lasersku spektroskopiju. Detaljnije informacije u vezi sa ovim predavanjima
mozete dobiti ukoliko posaljete svoj mail na adresu markusev@phy.bg.ac.yu, subject:
predavanja.
Apstrakti predavanja
1. Prvo predavanje, ponedeljak 18.11.2002. godine,
Institut za fiziku, sala 10, pocetak u 12.30
"Gas Sensing with Tunable Lasers"
Prof. Dr.
Markus W. Sigrist
ETH Zurich
Institute of Quantum
Electronics
Laboratory for Laser Spectroscopy
and Environmental
Sensing
Hoenggerberg HPF D19
CH-8093
Zurich
Switzerland
Abstract
Trace gas sensing plays an
important role in different areas like
environment, industry, agriculture,
medical diagnostics, etc. This lecture
discusses the fundamentals and main
issues of gas sensing with tunable
lasers emitting in the near- and
mid-infrared wavelength range. The
performance of some systems that we
have developed at our institute is
presented. The laser sources employed are
near-IR diode lasers, CO2-lasers,
quantum cascade lasers and nonlinear
optical sources like optical
parametric oscillators and difference frequency
generation: Detection
schemes include multipass absorption, photoacoustics
and cavity ringdown.
Illustrative examples ranging from street traffic
emission to hydrogen
diffusion in optical fibers are discussed.
2. Drugo predavanje, utorak 19.11.2002.
godine, Institut za fiziku, sala 10, pocetak u 12.30
"Trace Gas Analysis using Infrared Laser
Spectroscopy"
Prof. Dr. Markus W. Sigrist
ETH Zurich
Institute of
Quantum Electronics
Laboratory for Laser Spectroscopy
and Environmental
Sensing
Hoenggerberg HPF D19
CH-8093 Zurich
Switzerland
Abstract
Trace gas
analysis requires high sensitivity and selectivity,
multi-component
capability, large dynamic range, fieldability, etc. In
recent years we have
developed spectroscopic systems based on tunable
infrared lasers that can
fulfil many of these requirements. Lasers like
external cavity diode lasers,
CO2 lasers, quantum cascade lasers, optical
parametric oscillators and
difference frequency generation sources are
employed. Detection schemes
include multipass absorption, photoacoustics
and cavity ringdown. The
performance of several systems is demonstrated
with illustrative applications
such as street traffic emission
measurements, analysis of fume samples
from electro-knive surgery in
hospitals or monitoring of hydrogen diffusion
in optical fibers
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