Patent ID: 7123800

Claim:
An integrated optical device, comprising: a loop resonator with at least one closed waveguiding loop, the loop resonator having losses; a coupler coupled to the loop resonator; at least one input waveguide coupled with a first coupler to the loop resonator; a first adjustment unit to control a coupling coefficient K 1 of the first coupler; a second coupler coupled to the loop resonator; and at least one output waveguide coupled with the second coupler to the loop resonator, the second adjustment unit configured to control a coupling coefficient K 2 of the second coupler, being related to the value of K 1 , accordingly to the following equation K 2 =f{K 1 ,ξ}, providing Q{K 2 }=Max {Q}, where (1−ξ) are the total optical losses within the loop resonator and Q is a resonator characteristic.