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2-μm Ho emitter-based coherent DIAL for CO(2) profiling in the atmosphere.

Identifieur interne : 000203 ( Main/Exploration ); précédent : 000202; suivant : 000204

2-μm Ho emitter-based coherent DIAL for CO(2) profiling in the atmosphere.

Auteurs : F. Gibert ; D. Edouart ; C. Cénac ; F. Le Mounier ; A. Dumas

Source :

Optics letters [ 1539-4794 ] ; 2015.

RBID : pubmed:26125375

Abstract

We report on the use of a thulium-fiber-pumped holmium-based emitter in a coherent differential absorption lidar (CDIAL) experiment for high time and space resolution of CO(2) absorption field in the atmosphere. The 2-μm high-power dual-wavelength single-mode Q-switched Ho:YLF oscillator delivers 10-mJ pulses with a duration of 40 ns at 2 kHz. Both short pulse duration and high repetition rate were chosen to increase the DIAL precision and time and space resolution in coherent detection. The CDIAL provides 150-m range and 15-min time-resolved CO(2) absorption coefficient with a calculated instrumental error of 0.5% at 500 m and less than 2% at 1 km. Dry-air CO(2) mixing ratio estimates from the DIAL system are compared with simultaneous in situ gas analyzer measurements during a 20-h-long experiment.

PubMed: 26125375

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">We report on the use of a thulium-fiber-pumped holmium-based emitter in a coherent differential absorption lidar (CDIAL) experiment for high time and space resolution of CO(2) absorption field in the atmosphere. The 2-μm high-power dual-wavelength single-mode Q-switched Ho:YLF oscillator delivers 10-mJ pulses with a duration of 40 ns at 2 kHz. Both short pulse duration and high repetition rate were chosen to increase the DIAL precision and time and space resolution in coherent detection. The CDIAL provides 150-m range and 15-min time-resolved CO(2) absorption coefficient with a calculated instrumental error of 0.5% at 500 m and less than 2% at 1 km. Dry-air CO(2) mixing ratio estimates from the DIAL system are compared with simultaneous in situ gas analyzer measurements during a 20-h-long experiment.</div>
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2-μm Ho emitter-based coherent DIAL for CO(2) profiling in the atmosphere.

2-μm Ho emitter-based coherent DIAL for CO(2) profiling in the atmosphere.

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Abstract

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