Optical coupling device and corresponding method for tuning

An optical coupling device (99) and a method for tuning the device, the device comprising a pair of optical waveguides (1, 2) optically coupled to each other at a first optical coupling channel (3) and a second optical coupling channel (7), respectively, the first optical waveguide (1) comprises a first region (4) and a second region (5) having different doping types from each other and a reciprocal interface (6) arranged at least partially at the first optical coupling channel (3), where the device (99) comprises a first electrode (8) and a second electrode (9) electrically connected to the first optical waveguide (1) on opposite sides of the interface, the method comprises applying a voltage difference between the first electrode (8) and the second electrode (9) to apply an electric field to the interface (6), introducing an input optical signal, and adjusting the voltage difference to vary the ratio between the optical powers of the pair of output optical signals. 一种光学耦合设备(99)和用于调谐该设备的方法，该设备包括一对光波导(1、2)，这对