Mirror image rejection down-conversion receiving system and method based on photoelectric oscillator
A photoelectric oscillator and image suppression technology, which is applied in the field of optical communication, can solve the problems of IM suppression performance degradation and achieve the effects of avoiding mismatch problems, low power consumption, and high-performance optical down-conversion output
Active Publication Date: 2022-02-25
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The invention discloses a mirror image rejection down-conversion receiving system and method based on a photoelectric oscillator, and mainly relates to the field of optical communication and the technical field of microwave photons. The system comprises a photoelectric oscillator loop and a down-conversion oscillation loop, the photoelectric oscillator loop comprises a laser, a first phase modulator, an optical amplifier, a first optical circulator, a first phase shift Bragg grating, a first photoelectric detector and an electric coupler, and selective amplification receiving of radio frequency input signals is achieved; and the down-conversion oscillation loop comprises a second phase modulator, a second circulator, a second phase shift Bragg grating, a second photoelectric detector, an electric amplifier and an electric beam splitter, and down-conversion output of the radio frequency input signal is realized. The beneficial effects of the invention are that the system does not need external local oscillator signal source input, the input IM signal is filtered through the frequency selection characteristic of the photoelectric oscillator, the 'mismatch problem' in the phase cancellation technology can be avoided, and the applicable frequency range can be tuned by tuning the frequency of the laser.
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