Optics: measuring and testing – By light interference – Spectroscopy
Reexamination Certificate
2006-03-14
2006-03-14
Lee, Andrew H. (Department: 2877)
Optics: measuring and testing
By light interference
Spectroscopy
C356S484000, C356S437000
Reexamination Certificate
active
07012696
ABSTRACT:
The disclosure relates to optical heterodyne detection cavity ringdown spectroscopy. In one aspect the disclosure relates to an optical system comprising a ringdown cavity cell defining a resonant optical cavity, means for directing coherent light selected from the group consisting of continuous or quasi-continuous light into said optical cavity, means for altering the resonant optical cavity so as to generate a frequency shift of the coherent light in the optical cavity, means for coupling said coherent light into the optical cavity and means for decoupling the frequency shifted coherent light out of said optical cavity, means for optically combining said decoupled frequency shifted coherent light with another portion of coherent light not in optical communication with the optical cavity and means for optical heterodyne detection of the intensity of said combined light. A method for optical detection is also described as well as methods and apparatus for detecting a parameter of a sample.
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He Yabai
Orr Brian J.
Lee Andrew H.
Macquarie Research Ltd.
Marshall & Gerstein & Borun LLP
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