CO_2 laser-based differential absorption lidar system for range-resolved and long-range detection of chemical vapor plumes

Carlisle, Clinton B.; Laan, Jan E. van der; Carr, Lewis W.; Adam, P.; Chiaroni, Jean-Pierre

doi:10.1364/ao.34.006187

Cited by 47 publications

(9 citation statements)

References 13 publications

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“…The accurate and real time measurement of water vapour is therefore significant for better understanding of hydrological cycle. The measurement of water vapour has been made using DIAL14 by tuning CO2 laser on "ON" resonance line R (20) Fig. 3 .…”

Section: Water Vapourmentioning

confidence: 99%

Measurements of water vapor, surface ozone, and ethylene using differential absorption lidar

2001

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The measurement of various minor constituents in the atmosphere is of great significance to understand physics, Chemistry and dynamics of the atmosphere. Ozone in the troposphere is one of the most important trace species as it is a greenhouse gas trapping the longwave radiation in 9.6 p.m band affecting the energy budget of the earthatmosphere system. It is also a pollutant produced as a result of anthropogenic activities such as fossil fuel burning and has potential to affect human health and vegetation if it is allowed to attain high concentrations. Water vapour also plays a significant role in climate studies and the chemistry of the atmosphere. Ethylene is an urban pollutant and its concentration as low as 10 ppb is toxic to plants. A differential absorption lidar system using a tunable CO2 laser has been designed and developed at National Physical Laboratory, New Delhi, to monitor various minor constituents in the atmosphere. Some times ethylene concentration was found to be more than 20 ppb while that of surface ozone was more than 140 ppb which is a health hazard. In this paper salient features of experimental set up and results obtained will be presented in detail.

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Section: Water Vapourmentioning

confidence: 99%

Measurements of water vapor, surface ozone, and ethylene using differential absorption lidar

2001

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“…An especially sensitive analysis method under troposphere conditions is a differential absorption lidar (DIAL) operating in the middle infrared spectral region. Though there were several attempts to apply this method to the detection of atmospheric pollutants, most of these systems were cumbersome [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Determination of atmospheric trace gases by infrared differential absorption lidar

Vaicikauskas¹

2007

Lithuanian J. Phys.

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A differential absorption lidar system for detection of atmospheric pollutants based on the middle infrared tandem optical parametric oscillator is presented. The characteristics of the signal obtained by detecting radiation backscattered from different topographical objects were measured in the field test of the system. These characteristics were used to calculate the minimum detectable concentration of several atmospheric pollutants: ozone, methane, ammonia, etc. Most of the gases can be detected below typical background concentrations for the low-polluted atmosphere.

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“…Differential absorption lidar is a powerful technique for remote detection of chemical gases in the atmosphere [3]. Lidars based on CO 2 laser were used as workhorses for operating in the mid-infrared spectral region near 10 microns till now [4][5][6]. Mid-infrared spectral region is very attractive because in it are situated practically all atmospheric chemical pollutions molecules vibronic spectra, it is called "molecular finger-print region".…”

Section: Introductionmentioning

confidence: 99%

An OPO-based lidar system for differential absorption measurements of hazardous gases in mid-infrared spectral region.

Vaicikauskas¹,

Kabelka²,

Kuprionis

et al. 2005

Electro-Optical Remote Sensing

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We present the second phase of our work in project LISATNAS devoted to design the differential absorption lidar (DIAL) based on the mid-infrared (IR) tunable Optical Parametric Oscillator (OPO). Generation of tunable mid-infrared laser radiation using a two stage tandem OPO was demonstrated. The first stage was based on the nonlinear KTP crystal and produced up to 45 mJ of 1.57 µm radiation, while pumped by a commercial Q-switched Nd:YAG laser. The quality of signal beam was improved by the use of unstable resonator. The AgGaSe 2 crystal was used in the second stage OPO. Idler energies up to 1.2 mJ were generated in this stage within tuning range from 6 to 12 µm. The receiver consisted of a 250 mm gold mirror telescope, pyroelectric detector with control electronics. Preliminary field test results for detection of H 2 O using a retroreflector are presented.

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CO_2 laser-based differential absorption lidar system for range-resolved and long-range detection of chemical vapor plumes

Cited by 47 publications

References 13 publications

Measurements of water vapor, surface ozone, and ethylene using differential absorption lidar

Measurements of water vapor, surface ozone, and ethylene using differential absorption lidar

Determination of atmospheric trace gases by infrared differential absorption lidar

An OPO-based lidar system for differential absorption measurements of hazardous gases in mid-infrared spectral region.

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