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Optical control of a resonant tunneling diode microwave-photonic oscillator
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We report on optical injection-locking of a microwave-photonic oscillator based on the integration of a resonant tunneling diode optical waveguide photodetector with a communication laser diode. The oscillator locking was achieved with in-fiber optical powers as low as 0.2 mW, and locking ranges up to 23.8 MHz for in-fiber optical power of few milliwatts and with phase-noise suppression below 110 dBc/Hz at 10-kHz frequency offset from the center frequency. The circuit’s dynamics are well described as an optically controlled Liénard oscillator.
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Romeira, Bruno; Figueiredo, José M. L.; Ironside, Charles N.; Kelly, Anthony E.; Slight, Thomas J.Optical Control of a Resonant Tunneling Diode Microwave-Photonic Oscillator, IEEE Photonics Technology Letters, 22, 21, 1610-1612, 2010.