Patent ID: 8477314
Filing Date: 2013-07-02
Classification: G01J

Abstract:
1. A method for correcting a beating interference signal, the method comprising: providing a frequency comb having frequency components non-uniformly distributed in a source spectrum; interfering the frequency components to produce the beating interference signal having a beating spectrum with beating components, the frequency comb having at least one variable frequency comb parameter; isolating at least one reference beating component subset among said beating components; monitoring at least one of a phase and a frequency of the reference beating component subset, the at least one of the phase and the frequency being related to the at least one variable frequency comb parameter; determining from the at least one of the phase and the frequency a correction function to be applied to the beating interference signal, the correction function to correct for a variation of the variable frequency comb parameter; recording the beating interference signal; and correcting a recorded beating interference signal using the correction function.