4 results about "Optoelectronic oscillator" patented technology

The invention belongs to the technical field of microwave photons, and provides a double-ring photoelectric oscillator with a stabilizing device and a stabilizing method thereof, the double-ring photoelectric oscillator is provided with a long ring, a short ring and a stabilizing device; the stabilizing device comprises a first piezoelectric ceramic optical fiber stretcher and a motor space light delay line; the radio frequency signal source generates a first optical probe signal and a second optical probe signal through modulation; the first optical probe signal is converted into a first electric probe signal after passing through the long ring; a second optical probe signal is converted into a second electric probe signal after passing through the short ring; the first frequency mixer and the second frequency mixer are used for performing homodyne frequency mixing on the electric probe signal and the radio frequency signal to generate a zero frequency error signal; and the two phase-locked loops generate compensation control signals according to the zero-frequency error signals. According to the invention, by outputting the control signal and adjusting the optical fiber delay line, the stability of two loops is ensured, the problem of combined signal frequency drift caused by neglecting short-loop delay change is solved, and the coherence requirement on two paths of optical signals is avoided by electric field combination.

The invention belongs to the technical field of photoelectricity, and particularly relates to a broadband frequency doubling device based on a harmonic injection locking optoelectronic oscillator and an implementation method. According to the invention, + / -1-order optical sidebands are generated by using a carrier suppression double-sideband modulation mode of the electro-optical intensity modulator, and initial second-order harmonic injection signals are generated after beat frequency of the photoelectric detector. And when the frequency of the injection signal is aligned with the oscillation mode in the ring cavity of the photoelectric oscillator, the frequency of the oscillation mode output by the photoelectric oscillator is locked at the frequency of the injection signal, and finally, the output of the frequency doubling signal with optimized phase noise is realized.

This invention provides an optoelectronic oscillator and its control method, relating to the fields of smart materials and soft robotics. The oscillator includes a fixed frame, an LCE rope, a thin rope, a mass block, a spring, a Y-shaped baffle, and a seesaw. One end of the LCE rope, the thin rope, and the spring are connected at a connection point G. The other ends of the LCE rope and the spring are fixed to the fixed frame. The mass block is fixed to the other end of the thin rope and placed on the seesaw. The seesaw is rotatably connected to the fixed frame via a fulcrum, allowing it to rotate left and right. A linear light source illuminates the LCE rope, causing the mass block to move on the seesaw and trigger its rotation, which in turn causes the Y-shaped baffle to switch the illumination / blocking state of the LCE rope, forming a periodic cycle. This application actively introduces a mechanical time delay through structural design, thereby eliminating the dependence on rapid material response. It features a simple structure, relaxed driving conditions, and a controllable oscillation period, adaptable to different application scenarios. Furthermore, its physical mechanism is clear, facilitating theoretical modeling and control.

The device includes: a laser to be measured used to output an optical carrier; a phase modulator used to modulate a microwave signal onto the optical carrier, to output a phase-modulated optical signal; an optical notch filter used to filter the phase-modulated optical signal, to output an intensity-modulated optical signal; a photodetector used to detect the intensity-modulated optical signal to output a radio frequency signal; a radio frequency power splitter used to split the radio frequency signal to output at least two radio frequency signals; and a radio frequency phase noise measurement system used to perform phase noise measurement on one of at least two radio frequency signals, to obtain the phase noise of the laser to be measured. One of at least two radio frequency signals is modulated onto the optical carrier by using the phase modulator to output phase-modulated optical signal.