Apparatus, method and computer-readable storage medium for...

Details Apparatus, method and computer-readable storage medium for... Apparatus, method and computer-readable storage medium for...

G - Physics

01

N

G01N 23/00 (2006.01) G01N 23/06 (2006.01)

Patent

CA 2734559

A system is provided that includes a cavity ring-down spectrometer and a processor. The spectrometer is configured to pass, through a cavity resonator, a modulated, continuous-wave electromagnetic signal at each of one or more selectable, transmission frequencies in the Terahertz region of the electromagnetic spectrum. The spectrometer includes a transmitter that, with the cavity resonator, is configured so as to excite a single resonant mode of the cavity resonator. The processor is configured to receive a measurement of the passed portion of the modulated electromagnetic signal, and determine a phase shift of the modulated electromagnetic signal based upon the measurement. The processor is then configured to calculate a ring-down time of the cavity resonator as a function of the phase shift.

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