WAVWLENGTH TUNABLE OPTICAL TRANSMITTER

摘要

Provided is a wavelength tunable optical transmitter comprising a first waveguide receiving input light by an input port thereof and outputting the input light through a first output port thereof; a resonant modulator disposed to be adjacent to the first waveguide and varying a resonant wavelength according to a wavelength of the input light; and a second waveguide disposed to be parallel to the first waveguide with the resonant modulator interposed therebetween and outputting output light by a second output port thereof. The resonant modulator comprises a silicon resonator formed of a circular annular crystallized silicon film disposed between the first waveguide and the second waveguide; a first electrode formed of a first conductivity-type silicon film disposed on an inner circumferential surface of the silicon resonator; and a second electrode formed of a second conductivity-type silicon film disposed on a portion of an outer circumferential surface of the silicon resonator, wherein the resonant wavelength of the silicon resonator is varied by a direct current (DC) bias current applied between the first electrode and the second electrode.