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Reconfigurable microwave photonic notch filter

A microwave photonic and filter technology, applied in the field of microwave photonics, can solve the problems of weakening the interference signal, inaccurate elimination, large loss, etc.

Inactive Publication Date: 2019-07-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous method of processing signals in the traditional electrical domain cannot precisely eliminate or weaken interference signals
And the whole process has a large loss, slow speed, and weak anti-electromagnetic interference ability

Method used

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  • Reconfigurable microwave photonic notch filter
  • Reconfigurable microwave photonic notch filter
  • Reconfigurable microwave photonic notch filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The first laser and the second laser are the TSL-510 tunable laser of Santec Company, and the wavelength of the first laser is set to 1550nm (the corresponding frequency is f c1 =193.41448903THz), the wavelength of the second laser is also set to 1550nm, the double-drive Mach-Zehnder intensity modulator is the MZDD-LN-10 of Photline Company, and its bandwidth is 25GHz; the network analyzer is the 8722ES vector network analyzer of Agilent, the frequency The range is 40MHz-40GHz; Tektronix’s photodetector has a bandwidth of 20GHz; the isolation of the isolator is greater than 40dB; the high nonlinear fiber of YOFC Co., Ltd., the Brillouin gain linewidth of the high nonlinear fiber is Γ B =30MHz, the Brillouin frequency shift is 10GHz, the fiber length is 1000 meters, the gain and loss peak value is 5dB; the intensity modulator is MXAN-LN-20 of Photline Company, the bandwidth is 20GHz, and the DC bias voltage is 9V, which can make the The output of the modulator is carrier...

Embodiment 2

[0044] according to figure 1 Connect the corresponding instruments and equipment, and set the frequency of the first laser to f c1 =193.41448903THz, the microwave signal output by the network analyzer with a frequency range of 40MHz to 40GHz is loaded onto the optical carrier through the dual-drive Mach-Zehnder modulator, and the output signal enters the highly nonlinear optical fiber after passing through the isolator. In the other branch, the frequency of the second laser output is still set to f c2 The optical signal of =193.41448903THz first enters the intensity modulator and is modulated by the microwave of the first microwave signal, and the output frequency of the intensity modulator is f c2 ±nf p A series of upper and lower sidebands are sent to a dual parallel Mach-Zehnder modulator to generate a pump signal modulated by a single sideband, and then enter the highly nonlinear optical fiber through port 1 of the circulator. In a highly nonlinear fiber, the probe sign...

Embodiment 3

[0046] according to figure 1 Connect the corresponding instruments and equipment, and set the frequency of the first laser to f c1 =193.41448903THz, the microwave signal output by the network analyzer with a frequency range of 40MHz to 40GHz is loaded onto the optical carrier through the dual-drive intensity modulator, and the output signal enters the highly nonlinear optical fiber after passing through the isolator. In the other branch, the frequency of the second laser output is still set to f c2 The optical signal of =193.41448903THz first enters the intensity modulator and is modulated by the microwave of the first microwave signal, and the output frequency of the intensity modulator is f c2 ±nf p A series of upper and lower sidebands are sent to a dual parallel Mach-Zehnder modulator to generate a pump signal modulated by a single sideband, and then enter the highly nonlinear optical fiber through port 1 of the circulator. In a highly nonlinear fiber, the probe signal ...

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Abstract

The invention discloses a reconfigurable microwave photon notching filter, and belongs to the technical field of microwave photonics. The reconfigurable microwave photon notching filter is composed of a laser, a double-drive Mach-Zehnder strength modulator, an optical isolator, a vector network analyzer, a high nonlinear fiber, an intensity modulator, a first microwave signal source, a second microwave signal source, a double-parallel Mach-Zehnder strength modulator, a first DC stabilized voltage supply, a second DC stabilized voltage supply, a third DC stabilized voltage supply, a fourth DC stabilized voltage supply, a fifth DC stabilized voltage supply, an optical circulator and a photoelectric detector. The reconfigurable microwave photon notching filter disclosed by the invention is based on intensity modulation and the stimulated Brillouin scattering effect induced by pumping signals, a gain spectrum amplifies the intensity of an upper side band, so that the intensity of the corresponding position is the same, and the trapped wave output of the microwave photon filter is realized; and the number and the frequency of the pumping signals are changed to realize the reconfiguration of the number of trapped waves, the frequency of the trapped waves and the trapped wave spectral pattern.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and in particular relates to a reconfigurable tunable notch microwave photon filter based on highly nonlinear optical fiber stimulated Brillouin scattering effect and one or more pumping signals. Background technique [0002] With the rapid development of wireless communication, radar and remote sensing technology, microwave frequency resources are becoming more and more scarce, and people are paying more and more attention to the processing and preservation of useful microwave signals. At the same time, there will be more and more unwanted microwave interference signals in the increasingly complex microwave signals, which will affect people's accurate reception of signals, so the research on notch filters has gradually become a hot spot. The notch filter rapidly attenuates the input signal at a certain frequency point to achieve the filtering effect that prevents the signal of this f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/54H04B10/58H04B10/516H04B10/50H04B10/2575
CPCH04B10/2575H04B10/504H04B10/5165H04B10/54H04B10/58
Inventor 董玮姜凌珂张歆东阮圣平
Owner JILIN UNIV
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