Modulation cancellation method in laser spectroscopy

Details Modulation cancellation method in laser spectroscopy Modulation cancellation method in laser spectroscopy

2011-08-30

2011-08-30

Toatley, Gregory J (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

C356S323000, C356S128000

Reexamination Certificate

active

08009293

ABSTRACT:
Novel methods and laser spectroscopic systems for accurately measuring the concentration of compounds are disclosed herein. The disclosed methods utilize a modulation cancellation technique resulting in a significantly increase in the sensitivity and accuracy of laser spectroscopic measurements. In general, the methods and systems utilize modulation phase-shifting and amplitude attenuation to cancel the signals detected from at least two modulated light beams. Thus, any signal detected will be directly proportional to the concentration measurement.

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