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|Title:||Laser heterodyne system for measurement of mine constituents in the atmosphere|
|Authors:||Jain, S L|
|Abstract:||The monitoring of greenhouse gases has an important role in the understanding of global change. The reporting of ozone depletion in general and ozone hole over Antarctica in particular witnessed an unprecedented surge of interest in the monitoring of various trace species. The infrared spectroscopy is a powerful tool for the investigation of atmospheric minor constituents. The laser heterodyne spectrometer due to its ultra-high spectral resolution and quantum limited sensitivity can resolve the individual spectral lines completely and has been used widely for atmospheric studies. A highly sophisticated laser heterodyne system using a 1 GHz hi-tech acousto-optic spectrometer has been designed and developed at NPL, New Delhi, for monitoring ozone and other related constituents in the atmosphere. The salient features of the laser heterodyne system and the acousto-optic spectrometer and the results obtained are reviewed in detail.|
|ISSN:||0975-105X (Online); 0367-8393 (Print)|
|Appears in Collections:||IJRSP Vol.25(6) [December 1996]|
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