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DUAL-ETALON CAVITY RING-DOWN FREQUENCY-COMB SPECTROSCOPY

In an embodiment, a dual-etalon cavity-ring-down frequency-comb spectrometer system is described. A broad band light source is split into two beams. One beam travels through a first etalon and a sample under test, while the other beam travels through a second etalon, and the two beams are recombined onto a single detector. If the free spectral ranges (FSR") of the two etalons are not identical, the interference pattern at the detector will consist of a series of beat frequencies. By monitoring these beat frequencies, optical frequencies where light is absorbed may be determined."
Inventors: 

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Patent Number: 
WO2012003046
Patent Issue Date: 
February 5, 2012
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