Patent ID: 8406586
Filing Date: 2013-03-26
Classification: G02F,H01Q

Abstract:
1. An optical device for producing a tunable time delay of an input optical signal, comprising: an optical waveguide receiving the input optical signal; at least a first loop waveguide resonator coupled to the waveguide by a first coupler, the input signal being coupled in and out of the first loop resonator; at least a second loop waveguide resonator being coupled to the waveguide by a second coupler; the second loop resonator receiving a signal outputted by the first loop resonator and outputting an output signal; the output signal being transmitted by the waveguide; wherein the first and the second loop resonators having different resonant angular frequencies ω the time delay tuning is performed by a balanced thermal approach, which includes simultaneous thermal tuning up and down the first and second resonator respectively.