Abstract: A broadband radio frequency signal optical fiber phase-stable transmission system includes a local end and a remote end connected by a dispersion compensation module and an optical fiber. The local end modulates a first auxiliary signal whose frequency is half of the frequency of the to-be-transmitted signal and a second auxiliary signal whose frequency is 1.5 times the frequency of the to-be-transmitted signal through the optical carrier and filters out a lower sideband to obtain an optical signal containing only the optical carrier, a first signal, and a second signal corresponds to the optical signal of the first-order upper sideband. The optical signal is transmitted to the remote end through the dispersion compensation module and the optical fiber.

Abstract: The invention discloses a fast measurement apparatus for optical link delay based on optical mixing and delay quantization. The apparatus uses a high-stability reference source to generate intermediate frequency signal and local oscillator signal, and obtains optical domain radio frequency signals through photon mixing, so as to use for the measurement of optical link delay. After the test signal passes through the link to be tested and the reference link, and then is mixed in the electrical domain, the delay amount information is transmitted to the intermediate frequency, and the influence of port impedance mismatch is eliminated. By rapidly changing the frequency of a series of signals, and quickly detecting the phase and quantifying the delay of the returned intermediate frequency signal, the fast measurement of the optical link delay is realized.

Abstract: A device for generating wide capture range frequency tunable optical millimeter-wave signal includes a millimeter-wave signal generating structure, a millimeter-wave signal modulation structure, an optical delay phase detection structure and a feedback control loop. The millimeter-wave signal generating structure obtains millimeter-wave signal by beat frequency of the optical signal generated by a master laser and a slave laser, the millimeter-wave signal is modulated onto an optical carrier of the master laser by the electro-optical modulation structure, and then passes through the optical delay phase detection structure to generate an error signal associated with a frequency of the millimeter-wave signal. The error signal is controlled by the feedback control loop to change temperature and driving current of the slave laser, and adjust a difference between output wavelengths of the master laser and the slave laser, and at last maintain the frequency and phase of the millimeter-wave be stable.

Abstract: The device of the disclosure provides an optical frequency comb frequency multiplication link to generate millimeter wave signals. The device of the disclosure also provides a local oscillator and a delay compensation link to eliminate the influence of the phase noise of the local oscillator on the test system. The local oscillator signal is down-converted in the optical carrier radio frequency link to obtain an intermediate frequency signal. The intermediate frequency signal is then down-converted with the local oscillator signal and the millimeter wave signal twice to cancel the influence of the microwave mixer noise on the test system. At last, by detecting the output low-frequency signal noise, the ultra-low phase noise level of the millimeter wave signal can be accurately obtained.

Abstract: A frequency modulation demodulator based on fiber grating sensor array comprises: a laser, radio frequency signal source, acousto-optic modulator, delay fiber pair, Mach-Zehnder modulator, optical filter, optical amplifier, optical isolator, circulator, fiber grating sensor array, photodetector and data acquisition card. By the cooperation of delay fiber pair and the fiber grating, the reflected optical pulses of the two gratings (the front grating and the back grating) are overlapped in the time domain to form interference, and thereby achieving multi-point array interference demodulation.

Abstract: A frequency modulation demodulator based on fiber grating sensor array comprises: a laser, radio frequency signal source, acousto-optic modulator, delay fiber pair, Mach-Zehnder modulator, optical filter, optical amplifier, optical isolator, circulator, fiber grating sensor array, photodetector and data acquisition card. By the cooperation of delay fiber pair and the fiber grating, the reflected optical pulses of the two gratings (the front grating and the back grating) are overlapped in the time domain to form interference, and thereby achieving multi-point array interference demodulation.