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Wide tuning photoelectric hybrid oscillator and microwave signal generation method

An optoelectronic hybrid, microwave signal technology, applied in the field of microwave photonics, to achieve the effect of improving frequency stability

Inactive Publication Date: 2016-11-23
PEKING UNIV
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Problems solved by technology

This scheme is suitable for the generation of microwave signals with wide frequency tuning and low phase noise

Method used

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  • Wide tuning photoelectric hybrid oscillator and microwave signal generation method
  • Wide tuning photoelectric hybrid oscillator and microwave signal generation method
  • Wide tuning photoelectric hybrid oscillator and microwave signal generation method

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Embodiment Construction

[0032] The solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0033] The scheme principle of the present invention is as figure 2 shown. After the single-frequency light output by the signal laser passes through the isolator and is modulated by the phase modulator, it forms upper and lower symmetrical optical sidebands near the optical carrier. The amplitude of the symmetrical optical sidebands is equal and the phase difference is 180 degrees. The phase-modulated light is injected into a highly nonlinear fiber. The pump laser outputs polarization-maintained continuous wave laser through the polarization controller and injects it into port 1 of the circulator. After the action of the circulator, the pump laser is output from port 2 and injected into the high nonlinear fiber in the opposite direction relative to the signal laser. The wavelength of the reversely injected pump light is greater than that...

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Abstract

The invention discloses a wide tuning photoelectric hybrid oscillator and a microwave signal generation method. A signal light source output end of the oscillator is connected with an input end of a phase modulator, the input end of the phase modulator is connected with a second port of a light circulator through a non-linear fiber, an output end of a pump light source is connected with a first port of the light circulator through a polarization controller, a third port of the light circulator is connected with a photoelectric conversion link through a light filter, an output end of the photoelectric conversion link is connected with a radio frequency driving end of the phase modulator, another output end of the photoelectric conversion link is taken as a microwave signal output end, wavelength of the pump light source is greater than wavelength of a signal light source, frequency of the signal light source is at least f greater than frequency of the pump light source, the f is Stokes frequency shift, and the light filter is used for filtering Stokes waves generated by the non-linear fiber. The wide tuning photoelectric hybrid oscillator is suitable for generation of wide frequency tuning low phase noise microwave signals, bandwidth of the signals is dozens of MHz, a sub-oscillation mode can be effectively inhibited, and good stability is realized.

Description

technical field [0001] The invention relates to a method and system suitable for wide-tuning low-noise photoelectric hybrid oscillation. The frequency selection of the photoelectric hybrid oscillator is realized by utilizing the narrow-band optical filter produced by the Brillouin scattering effect in the highly nonlinear optical fiber, which belongs to the field of microwave photonics. Background technique [0002] Microwave photonics mainly studies the interaction between microwave signals and optical signals. Compared with traditional microwave systems, it has the advantages of small size, light weight, low cost, no electromagnetic interference, good nonlinear performance, and wide application bandwidth. There are in-depth applications in broadband wireless communication, radar systems, electronic countermeasures and other fields. Photoelectric hybrid oscillation technology can generate high-frequency microwave signals with extremely low phase noise, and is one of the ke...

Claims

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Application Information

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IPC IPC(8): H01S1/02G02F1/365
Inventor 彭焕发张诚徐永驰郭芃胡薇薇朱立新陈章渊
Owner PEKING UNIV
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