Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect

A technology of stimulated Brillouin and photoelectric oscillators, used in masers, solid-state lasers, phonon exciters, etc.

Inactive Publication Date: 2012-10-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional OEO frequency continuous tuning schemes usually use electric microwave phase shifters, and electric microwave phase shifters are limited by operating bandwidth and insertion loss, making it difficult to tune high-frequency microwave signals

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  • Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect
  • Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect
  • Wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect

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Embodiment Construction

[0039] In order to further illustrate the technical content of the present invention, the present invention will be further described below in conjunction with accompanying drawing, wherein:

[0040] The working principle of the present invention is as follows: the continuous light output by the laser light source (a) is divided into two signals by the optical coupler (c), and one signal is passed through the first electro-optical modulator (e), the third optical fiber jumper (f ), the first optical circulator (g), single-mode fiber (h), the second optical circulator (i), the fourth optical fiber jumper (j), optical detector (k), low-noise broadband microwave amplifier (u ), adjustable band-pass microwave filter (m) and microwave directional coupler (n) constitute the OEO loop. Frequency, get a stable microwave signal, and output from one output port of the microwave directional coupler (n); the other signal passes through the fifth optical fiber jumper (o), the second electro...

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Abstract

The invention discloses a wideband continuously tunable photoelectric oscillator based on excited Brillouin scattering effect, aiming at providing a wideband continuously tunable photoelectric oscillator. A carrier wave of a light single-sideband modulation signal in the photoelectric oscillator is subjected to phase shift by the excited Brillouin scattering effect in an optical fiber; the change of the phase shift quantity of a microwave signal in an annular cavity of the photoelectric oscillator is realized through beat frequency of the carrier wave of the light modulation signal and a positive first-order sideband or a negative first-order sideband in the position of a light detector; and the continuously tunable wideband of the output signal frequency of the photoelectric oscillator is finally realized in combination with a tunable microwave filter at the same time.

Description

technical field [0001] The invention relates to the technical field of photoelectric oscillators, in particular to a broadband continuously tunable photoelectric oscillator. Background technique [0002] High-performance microwave sources are widely used in the fields of radar, electronic countermeasures, communication and measurement. Traditional microwave sources are mainly realized by electric vacuum devices or solid-state devices, which have disadvantages such as low operating frequency, narrow frequency tuning range and high noise, which greatly limit the performance of microwave systems. In contrast, an optoelectronic oscillator (OEO), as a new type of microwave signal generator, can generate high frequency, low phase noise and high stability signals, and is an ideal microwave source. In addition, OEO can also realize functions such as clock recovery, code conversion and time division multiplexing of optical data stream signals, and has important application value in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S1/00H01S1/02
Inventor 郑狄潘炜邹喜华闫连山罗斌
Owner SOUTHWEST JIAOTONG UNIV
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