High bandwidth tunable double-passband microwave photon filter

A microwave photonic, dual-passband technology, applied in the field of microwave photonics, can solve the problems of poor filter flexibility and inability to meet application requirements, etc.

Inactive Publication Date: 2014-08-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Most of the current dual-passband microwave filters are filtered in the electrical domain. The two passbands of this filter are usually fixed, or one passband is fixed and the other passband is tuned within a narrow range. Therefore, the flexibility of this filter is poor and cannot meet the actual application requirements.

Method used

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  • High bandwidth tunable double-passband microwave photon filter

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Embodiment 1

[0024] 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 c =193.41THz), the frequency range of the second laser is 193.40THz~193.45THz, the first phase modulator and the second phase modulator are MPZ-LN-40 of Photline Company, and its bandwidth is 38GHz; the network analyzer is Agilent’s 8722ES vector network analyzer, the frequency range is 50M-40GHz; Tektronix’s photodetector, the bandwidth is 20GHz; the isolation of the isolator is greater than 40dB; The line width of Liouin gain is Γ B = 30MHz, Brillouin frequency shift f B , the fiber length is 1000 meters, the gain and loss peaks are 5dB; the isolation of the isolator is greater than 40dB; 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 modulator The output is carrier-suppressed double-sideband modulation, and t...

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Abstract

The invention discloses a high bandwidth tunable double-passband microwave photon filter, belongs to the field of microwave photonics, and relates to the high bandwidth tunable double-passband microwave photon filter based on high non-linear optical fiber excited brillouin scattering effects and multiple pumping signals. The filter consists of a first laser, a first phase modulator, an opto-isolator, a vector network analyzer, a high non-linear optical fiber, a second laser, a strength modulator, a microwave signal source, a second phase regulator, a pulse code generator, an erbium-doped optical fiber amplifier, an optical circulator and a photoelectric detector. The filter is based on phase modulation and excited brillouin scattering effects caused by two pumping signals, and thus double-passband output of the microwave photon filter is achieved. By changing the frequency of the two pumping signals, the frequency of two passband centers can be randomly modulated within a certain frequency range. Through binary phase shift keying modulation on the pumping signals, the bandwidth of the pumping signals can be changed, and thus adjustment on the output bandwidth of the filter is achieved.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and relates to a high-bandwidth tunable double-passband microwave photon filter based on highly nonlinear optical fiber stimulated Brillouin scattering effect, double pumping signals and binary phase-shift keying modulation technology. 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 due to the diversification of communication modes, it will be difficult for single-band communication to meet the demand. Therefore, working in two or more frequency bands at the same time The communication system has become an important direction of wireless communication research. Wireless Local Area Network (WLAN) is because the original communication frequency band cannot meet the access needs of a large number of users. On the basis of the original communication protocol,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/70H04B7/005G02F1/01
Inventor 董玮肖永川张歆东阮圣平陈维友
Owner JILIN UNIV
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