1. Frequency-based optical spectroscopy
Trevor J. Sears
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Frequency – MHz
Frequency comb-based techniques are going to revolutionize many aspects of spectroscopy in the next decade.
Top figure shows a measurement of the P(11) line in the 1.5 micron band of C2H2 with accuracy and precision of 4x1011.
Lower figure shows a nitrogen pressure broadened measurement of same line at 240K. The inset is a plot of the residuals following a fit to a model function showing the quality of the data.