Patent ID: 8625101
Filing Date: 2014-01-07
Classification: G01J

Abstract:
1. A system for correcting a beating interference signal, the system comprising: a source system for producing a frequency comb having frequency components non-uniformly distributed in a source spectrum, the frequency components to be interfered to produce the beating interference signal having a beating spectrum with beating components, a portion of the beating spectrum having a relation with a portion of the source spectrum, the frequency comb having at least one variable frequency comb parameter; at least one narrowband filter receiving the frequency comb and having a known frequency passband in the source spectrum for isolating a subset of frequency components among the frequency components, the subset of frequency components interfering to provide a reference beating component subset; a phase/frequency analyzer for monitoring at least one of a phase and a frequency of the reference beating component subset; a model calculator receiving the at least one of the phase and the frequency for determining a correction function to be applied to the beating interference signal, the correction function to correct for the at least one variable frequency comb parameter; an acquisition unit for recording the beating interference signal; and a correction unit receiving the recorded beating interference signal and the correction function for correcting the recorded beating interference signal using the correction function.