| 摘要 |
According to one embodiment of the present invention, a method of operating a laser source is provided. The laser source comprises a laser configured to generate an optical signal, and a polarization split and delay unit that is coupled to the optical signal. The polarization split and delay unit is configured to split the optical signal into a first and second orthogonally polarized component, create an optical path difference DeltaL between the first and second orthogonally polarized components and combine the first and second orthogonally polarized components into a combined signal. The method comprises modulating the optical signal by applying a wavelength modulation signal to the laser such that the modulated optical signal comprises at least a first wavelength lambda1 and a second wavelength lambda2, wherein the first wavelength lambda1 and the second wavelength lambda2 are separated by a wavelength difference Deltalambda. The wavelength difference Deltalambda and the optical path difference DeltaL are such that the first and second orthogonally polarized components oscillate back and forth from an in-phase state to an out of phase state. Additional embodiments are also disclosed and claimed.
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