Patent ID: 6879421

Claim:
An optical system comprising: an optical illumination subsystem for producing an optical beam having a swept wavelength; an optical coupler for receiving an output of said optical illumination system; a measurement resonator coupled to a first output of said optical coupler for generating a first resonance within a path of said measurement beam; at least one reference resonator coupled to a second output of said optical coupler for generating at least a second resonance within a path of said reference beam; a measurement optical detector coupled to said measurement resonator for measuring a measurement intensity of light at said measurement resonator; at least one reference optical detector coupled to said reference resonator for measuring a reference intensity of light at an associated one of said at least one reference resonator; and a processing subsystem coupled to an output of said measurement optical detector and an output of said at least one reference optical detector for interpreting variations in said measured intensity in conformity with variations in said reference intensity.