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Method and device for generating microwave signals based on Brillouin amplified multi-wavelength laser

A multi-wavelength laser and microwave signal technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of small tunable range of microwave signals and complex systems, and achieve simple structure, reduced electromagnetic interference, and low cost Effect

Inactive Publication Date: 2017-02-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some scholars have proposed a scheme to obtain microwave signals through Brillouin scattering combined with optical heterodyne method, such as the invention patent proposed by Fu Jiaojiao et al. (application number 200910155858.4), the invention patent proposed by Wang Rugang et al. The invention patent of Feng et al. (Application No. 201410093542.8) uses the difference frequency between Brillouin scattering and pump light to obtain microwave signals, which has certain application value. However, the tunable range for generating microwave signals is small, and the system is relatively complicated. Limit its application in fields such as radar

Method used

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  • Method and device for generating microwave signals based on Brillouin amplified multi-wavelength laser
  • Method and device for generating microwave signals based on Brillouin amplified multi-wavelength laser
  • Method and device for generating microwave signals based on Brillouin amplified multi-wavelength laser

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Embodiment 1

[0041] This embodiment provides a high-frequency tunable microwave signal generating device based on a Brillouin amplified multi-wavelength laser, which can be conveniently built by using existing lasers and optical fiber equipment based on the Brillouin principle. Such as figure 1 As shown, the present embodiment includes a laser unit 101, the laser is a tunable laser (Agilent lightwave measurementsystem8164B), the output wavelength is set to 1550nm, and the power is 0dBm, and the light output by it is 3dB by the third coupler unit 102 (50:50 ) is divided into two beams, wherein 50% of the light of one port enters the first isolator 113, and the signal output from the first isolator 113 enters the first port of the first circulator 111 through the first polarization controller 112, Enter the first optical fiber unit 110 from the second port of the first circulator 111, the first optical fiber unit 110 is a single-mode optical fiber of 20km, and the optical signal produces a B...

Embodiment 2

[0042] Embodiment two: if figure 2 As shown, compared with the structure of the microwave signal generating device in Embodiment 1, the structure of the multi-wavelength Brillouin laser unit 100 is the same, the difference is that the output signal of the multi-wavelength Brillouin laser unit 100 enters the fiber grating unit 119 , the output end of the fiber grating unit 119 is connected to the second isolator 120, the output end of the second isolator 120 is connected to the third filter unit (tunable filter unit) 121, and the output end of the third filter unit 121 is connected to the second photoelectric The detector unit 122 is converted into a microwave signal output by the second photodetector unit 122 . The third filtering unit 121 in the second embodiment can adopt the same adjustable filter unit as the second filtering unit 116 in the first embodiment, and the second photodetector unit 122 can adopt the first photodetector unit in the first embodiment. Detector uni...

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Abstract

The invention discloses a method and a device for generating a microwave signal based on a Brillouin amplification multi-wavelength laser device. The device comprises a multi-wavelength laser device unit, a filter, a coupler, a photoelectric detector and the like, wherein the multi-wavelength laser device unit comprises a laser device unit, a coupler unit, an amplifier unit, a circulator unit, an optical fiber unit, a polarization controller unit and an isolator unit. The device and the method for generating the microwave signal not only can generate a high-frequency microwave signal and but also can acquire a multi-bandwidth tunable microwave signal. The device disclosed by the invention does not need an electronic device, so that the probability of electromagnetic interference and the like is greatly reduced; furthermore, the device has the advantages of low cost and simple structure.

Description

technical field [0001] The invention relates to a method and device for generating microwave signals based on Brillouin amplified multi-wavelength lasers, which are mainly used in technical fields such as wireless sensor networks, optical fiber communication systems, and microwave photonics. Background technique [0002] The microwave signal source is one of the basic devices in the microwave system, and its performance directly determines the working performance of the system. At present, microwave signal sources have been widely used in modern information systems such as microwave communication, radar guidance, remote sensing and control, and electronic countermeasures. With the rapid development of information technology, high-quality microwave sources have become the key to success; With the continuous enrichment of services and the continuous increase of occupied spectrum resources, the technology based on digital electronics has approached the processing limit of elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/30H01S3/102H01S3/108
Inventor 王如刚赵力周锋
Owner SOUTHEAST UNIV