A Low-Cost Miniaturized Laser Heterodyne Radiometer (Mini-LHR) for Near-IR measurements of CO2 and CH4 in the atmospheric column | Zendy

E. L. Wilson | Zendy

Open Access

A Low-Cost Miniaturized Laser Heterodyne Radiometer (Mini-LHR) for Near-IR measurements of CO2 and CH4 in the atmospheric column

Author(s) -

E. L. Wilson

Publication year - 2016

Publication title -

conference on lasers and electro-optics

Language(s) - English

Resource type - Conference proceedings

DOI - 10.1364/cleo_at.2016.ath3j.2

Subject(s) - radiometer , optics , laser , heterodyne (poetry) , microwave radiometer , materials science , sunlight , heterodyne detection , infrared , collimated light , remote sensing , lidar , environmental science , physics , optoelectronics , geology , acoustics

The miniaturized laser heterodyne radiometer (mini-LHR) is a ground-based passive variation of a laser heterodyne radiometer that uses sunlight to measure absorption of CO2 and CH4 in the infrared. Sunlight is collected using collimation optics mounted to an AERONET sun tracker, modulated with a fiber switch and mixed with infrared laser light in a fast photoreciever. The amplitude of the resultant RF (radio frequency) beat signal correlates with the concentration of the gas in the atmospheric column.

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