Patent ID: 9310562
Filing Date: 2016-04-12
CPC Classification: G02B,G02F,H04J

Claim Text:
1. An optical device, comprising: an input optical waveguide configured to convey an input optical signal that includes multiple wavelengths; a ring resonator, having a resonance wavelength, optically coupled to the input optical waveguide; an output optical waveguide configured to convey an output optical signal that includes a wavelength in the multiple wavelengths; a monitoring mechanism, optically coupled to the output optical waveguide, configured to monitor the output optical signal; and control logic configured to adjust the resonance wavelength based on the monitored output optical signal, wherein the adjustment is made without monitoring the input optical signal, wherein the control logic is configured to adjust the resonance wavelength by adjusting a temperature of the ring resonator, wherein the control logic is configured to dither the temperature of the ring resonator at a frequency, and wherein the monitoring mechanism is configured to detect amplitude and phase information at the frequency and twice the frequency.