Patent ID: 8693872
Filing Date: 2014-04-08
Classification: H01S,H04B,H04J

Abstract:
1. A wavelength adjusting method, comprising: modulating, by using scrambling signals with a same frequency and different phases, signals in wavelength channels corresponding to the different phases; optically splitting and wavelength locking the modulated signals, to acquire photoelectricity detector (PD) signals; performing phase discrimination on the PD signals, so as to acquire scrambling information of the different phases, wherein the scrambling information comprises wavelength information of the wavelength channels; determining wavelength-shift of the scrambling information of the different phases, so as to acquire different shift values corresponding to the wavelength information in the scrambling information of the different phases; and adjusting wavelengths of the wavelength channels of the different phases according to the different shift values; wherein before the performing the phase discrimination on the PD signals, so as to acquire the scrambling information of the different phases the method further comprises: filtering the PD signals output from a wavelength locker comprising an etalon; wherein the determining the wavelength-shift of the scrambling information of the different phases, so as to acquire the different shift values corresponding to the wavelength information in the scrambling information of the different chases comprises: comparing the signal wavelength responsivity with pre-saved signal wavelength responsivity to acquire a responsivity difference; and acquiring the different shift values corresponding to the wavelength information in the scrambling information of the different phases according to the responsivity difference.