Applications of tunable dye lasers to air pollution detection: Measurements of atmospheric NO2 concentrations by differential absorption

Rothe, K. W.; Brinkmann, U.; Walther, H.

doi:10.1007/bf00884408

Cited by 109 publications

(9 citation statements)

References 9 publications

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“…Global detection and monitoring of atmospheric trace gases, particularly those of specific interest in the study of climate change, require a long-term solution. A space-borne method of active sensing of greenhouse gases would provide such coverage and can be accomplished using differential absorption lidar (DIAL) [1,2] with either one or a number of satellites in low-earth orbit. DIAL can be configured to sense different greenhouse gases such as methane or carbon dioxide via the use of lasers at different infrared wavelengths.…”

Section: Introductionmentioning

confidence: 99%

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

et al. 2018

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We describe a compact, all fiber, frequency stabilized diode laser system at 2051 nm using CO 2 gas-filled Kagome Hollow Core Fiber (HCF), capable of tuning continuously over four transitions in 12 C 16 O 2 : R(24), R(26), R(28), and R(30). This laser system has been designed for use in future space-based atmospheric monitoring using differential absorption lidar (DIAL). The fully spliced Kagome HCF gas cell is filled to 2 kPa CO 2 partial pressure and we compare the observed CO 2 lineshape features with those calculated using HITRAN, to quantify the properties of the CO 2-filled fiber cell. In this first demonstration of Kagome HCF used in a fully sealed gas cell configuration for spectroscopy at 2 µm, we characterize the frequency stability of the locked system by beat frequency comparison against a reference laser. Results are presented for the laser locked to the center of the 12 C 16 O 2 R(30) transition, with frequency stability of ∼40 kHz or better at 1 s, and a frequency reproducibility at the 0.4-MHz level over a period of > 1 month. For DIAL applications, we also demonstrate two methods of stabilizing the laser frequency ∼3 GHz from this line. Furthermore, no pressure degradation was observed during the ∼15-month period in which frequency stability measurements were acquired.

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Section: Introductionmentioning

confidence: 99%

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

et al. 2018

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“…He performed the first measurements of humidity vertical profiles utilising a Ruby laser tuned to the water vapour absorption line. The first measurement of atmospheric pollutants was made by Rothe et al, 11 who detected NO 2 up to distances of 4 km. By now there are several reports available on measurements of SO 2 and NO 2 using DIAL techniques.…”

Section: Introductionmentioning

confidence: 99%

System description of the mobile LIDAR of the CSIR, South Africa

et al. 2010

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“…The concentration profile of the target species is obtained from the difference in the backscattered intensity at the two wavelengths [1]. A Coumarin dye laser pumped by the third harmonic of a Nd:YAG laser has been conventionally used as a laser source for NO 2 measurement because of its simple configuration [2][3][4]. However, Coumarin dyes deteriorate rapidly, resulting in rapid decay in the laser output power, so that stable measurement over a long time was difficult.…”

Section: Introductionmentioning

confidence: 99%

Development of a laser radar using LDS dye and sum frequency generation for NO₂ measurement

Mori

Nayuki

Cao

et al. 2003

Electrical Engineering Japan

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SUMMARYA laser radar for measuring vertical concentration profiles of atmospheric NO 2 was developed. The laser transmitter uses an LDS765 dye laser pumped by a Nd:YAG laser. The dye laser output is converted to wavelengths 446.8 and 448.1 nm, which are used for NO 2 measurement, by sum frequency generation (SFG) using a pair of KD*P crystals. The dependence of the LDS765 dye laser output on wavelength and dye concentration was investigated, and the performance of the laser transmitter was evaluated. Compared to the Coumarin 445 dye laser conventionally used for NO 2 measurement, this laser transmitter represents a significant improvement in output stability, as well as in maximum output energy and overall conversion efficiency. Using the newly developed laser radar, NO 2 concentrations of 20 to 40 ppb were measured for vertical range 500 to 1000 m, which were in rough agreement with values monitored on the ground.

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Applications of tunable dye lasers to air pollution detection: Measurements of atmospheric NO2 concentrations by differential absorption

Cited by 109 publications

References 9 publications

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

System description of the mobile LIDAR of the CSIR, South Africa

Development of a laser radar using LDS dye and sum frequency generation for NO₂ measurement

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Applications of tunable dye lasers to air pollution detection: Measurements of atmospheric NO2 concentrations by differential absorption

Cited by 109 publications

References 9 publications

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO2-filled Kagome hollow core fiber gas-cell system

System description of the mobile LIDAR of the CSIR, South Africa

Development of a laser radar using LDS dye and sum frequency generation for NO2 measurement

Contact Info

Product

Resources

About

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

Laser frequency stabilization and spectroscopy at 2051 nm using a compact CO₂-filled Kagome hollow core fiber gas-cell system

Development of a laser radar using LDS dye and sum frequency generation for NO₂ measurement