| Abstract: | A photonic device is provided for impressing a modulation pattern on an
optical carrier. The device includes a unit in which a photodetector and
an optical microresonator are monolithically integrated. The device
further includes an optical waveguide evanescently coupled to the optical
microresonator and having at least an upstream portion configured to
carry at least one optical carrier toward the microresonator. The optical
microresonator is tunable so as to resonate with the optical carrier
frequency. The optical microresonator and the photodetector are mutually
coupled such that in operation, charge carriers photogenerated in the
photodetector are injected into the microresonator, where the
photocurrent changes the resonant conditions. In some embodiments the
device is operable as an optical-to-optical frequency converter. In other
embodiments the device is operable as an oscillator. |