Abstract
With the advent of a variety of tunable infrared lasers, high resolution spectroscopy in this region has received a great boost. In particular the high power spin flip Raman laser is an excellent tool for very high resolution spectroscopy of ground state as well as excited states of molecules, saturation spectroscopy of molecules and two-photon Doppler-free spectroscopy of molecules. In addition, the use of opto-acoustic techniques for absorption measurements in conjunction with the spin flip Raman laser is capable of measuring absorption coefficients as small as 10 -10 cm -1 . This ability has been of importance in the detection of minor constituents in the atmosphere and the stratosphere. This paper reviews some of these interesting investigations.
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Schedule a callMore From: Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
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