Publication Date:
2011-08-19
Description:
A simple fringe reduction method for FM diode laser spectroscopy is discussed. The fringes can be effectively suppressed by using a modulation frequency that is an integral multiple of the free spectral range of the fringes. The technique is experimentally confirmed by two-tone FM spectroscopy of water vapor absorption lines. A factor of 20 fringe reduction is observed.
Keywords:
LASERS AND MASERS
Type:
Applied Optics (ISSN 0003-6935); 28; 4973-497
Format:
text
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