A kind of master-slave photoelectric oscillator and method thereof

Abstract

The invention discloses a master-slave photoelectric oscillator and a method therefor. The master-slave photoelectric oscillator comprises a semiconductor laser, an electrooptical modulator, a long optical fiber, a photoelectric detector, a radio frequency amplifier, an equivalent narrow-band filter, a 1*2 power divider and an auxiliary photoelectric oscillator as a high-stability external reference module, wherein the auxiliary photoelectric oscillator comprises a second semiconductor laser, a second electrooptical modulator, a short optical fiber, a second photoelectric detector, a second radio frequency amplifier and a first radio-frequency bandpass filter; injection locking is achieved through a stable external reference source; one part of signal is injected into the equivalent narrow-band filter in a main oscillator through the 1*2 power divider; various modules of the main oscillator are connected through a radio frequency line or optical fiber to form a closed photoelectric loop; stable single radio frequency signal output is achieved through the equivalent narrow-band filter; and the signal has a very high spur suppression ratio and extremely low phase noise at the same time.

Description

technical field [0001] The invention belongs to the field of microwave and optoelectronics, and in particular relates to a master-slave photoelectric oscillator and a method thereof. Background technique [0002] Optoelectronic oscillators have the advantages of high Q value and low phase noise, and can be widely used in radar, communication, guidance, test and measurement and other fields. In traditional microwave signal generation methods, frequency doubling technology based on quartz crystal oscillators or dielectric oscillators is often used to generate, but frequency doubling technology will lead to a sharp deterioration of phase noise at the same time. In contrast, as a new type of oscillator combining light and electricity, the photoelectric oscillator can directly generate high-frequency microwave signals. The principle of generating signals is different from the traditional method, so it can generate high-frequency signals while maintain extremely low phase noise. ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of traditional photoelectric oscillators, such as uncertain start-up frequency, difficulty in taking into account spurious suppression and low phase noise output, and provide a single-mode start-up with high spurious suppression and extremely low frequency in the whole frequency band. Opto-Oscillator with Phase Noise Output

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