Patent ID: 9182647
Filing Date: 2015-11-10
Classification: G02B,G02F,H04J

Abstract:
1. A control method of an optical element including a plurality of light sources configured to emit lights having different wavelengths from each other, and a plurality of ring modulators configured to be connected in cascade along a light waveguide, wherein each of the ring modulators includes wherein the lights emitted from the light sources are multiplexed to be incident on the light waveguide, the method comprising: having one of the light sources emit the light; adjusting power to be supplied to the wavelength adjustment electrode in a corresponding one of the ring modulators, to obtain a value of the power causing the resonance wavelength of the ring resonator in the one of the ring modulators, to be equivalent to the wavelength of the light emitted from the one of the light sources; obtaining a relationship between the light sources and the values of the power corresponding to the ring modulators; and selecting the ring modulators corresponding to the light sources based on the relationship between the light sources and the values of the power.