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Correction of the distortion in frequency modulation spectroscopy

F du Burck and O Lopez

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A theoretical expression for the detected signal in frequency modulation spectroscopy with a residual amplitude modulation (RAM) is computed. The line shape distortion induced by the RAM is shown to be essentially suppressed for a proper choice of the modulation and detection parameters. The experimental tests are carried out in saturation spectroscopy of I2 at 514.5 nm. Experimental limitations are analysed.


PACS

42.62.Fi Laser spectroscopy

43.58.+z Acoustical measurements and instrumentation

Subjects

Instrumentation and measurement

Optics, quantum optics and lasers

Dates

Issue 7 (July 2004)

Received 12 February 2004, in final form 16 April 2004

Published 16 June 2004



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