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Broadband Tuned High-Q Single-Pass Band Microwave Photonic Filter

A technology of microwave photonics and filters, which is applied to broadband tuning high-Q value single-passband microwave photonic filter devices, directly processes microwave signals in the optical domain, and can solve the problem of low Q-value of single-passband filters. To achieve the effect of compact structure

Inactive Publication Date: 2016-03-02
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the existing single-pass band filter, it overcomes the problem of low Q value of the single-pass band filter, and the broadband tuning of the filter can be realized by combining a tunable light source and a broadband phase-shifting fiber grating

Method used

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  • Broadband Tuned High-Q Single-Pass Band Microwave Photonic Filter
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  • Broadband Tuned High-Q Single-Pass Band Microwave Photonic Filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a high-Q single-pass band microwave photonic filter based on an ordinary fiber grating and a phase-shifted fiber grating active linear cavity and output from one end of the phase-shifted fiber grating, the connection between the components: the output of the tunable light source 1 The terminal is connected to an input end of the phase modulator 2, the microwave signal is loaded onto the optical carrier through the phase modulator 2, the output end of the phase modulator 2 is connected to one end of the ordinary fiber Bragg grating 4, and the other end of the ordinary fiber Bragg grating 4 is connected to the optical amplifier 5 One end, the other end of the optical amplifier 5 is connected to one end of the phase-shifting fiber Bragg grating 6 , and the other end ring of the phase-shifting fiber Bragg grating 6 is connected to the input end of the photodetector 7 .

[0025] A hybrid structure of ordinary fiber grating 4 and phase-shifting fibe...

Embodiment 2

[0027] Such as figure 2As shown, a high-Q single-pass microwave photonic filter based on an ordinary fiber grating and a phase-shifted fiber grating active linear cavity and output from one end of the circulator, the connection between the components formed by it: the output end of the tunable light source 1 Connect to an input terminal of the phase modulator 2, the microwave signal is loaded onto the optical carrier through the phase modulator 2, the output terminal of the phase modulator 2 is connected to the ① port of the circulator 3, and the ② port of the circulator 3 is connected to the ordinary fiber grating 4 One end, the other end of the ordinary fiber Bragg grating 4 is connected to one end of the optical amplifier 5, the other end of the optical amplifier 5 is connected to one end of the phase-shifting fiber Bragg grating 6, and the third port of the circulator 3 is connected to the input end of the photodetector 7.

[0028] A hybrid structure of ordinary fiber gra...

Embodiment 3

[0030] Such as image 3 As shown, the high-Q single-passband microwave photonic filter based on the phase-shifted fiber grating active ring cavity, the connection between the devices formed by it: the output terminal of the tunable light source 1 is connected to an input terminal of the phase modulator 2, and the microwave The signal is loaded onto the optical carrier through the phase modulator 2, the output terminal of the phase modulator 2 is connected to the ① terminal of the coupler 8, the ③ terminal of the coupler 8 is connected to the ③ terminal of the circulator 3, and the ④ of the coupler 8 is connected to the optical amplifier 5 One end of the optical amplifier 5, the other end of the optical amplifier 5 is connected to the ① end of the circulator 3, the ② end of the circulator 3 is connected to one end of the phase-shifting fiber Bragg grating 6, and the ② end of the coupler 8 is connected to the input end of the photodetector 7.

[0031] After being modulated by th...

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Abstract

The invention provides a broadband tuning high-Q-value single-passband microwave photonic filter. The photonic filter is an active cavity based on a phase shift fiber bragg grating (6), the active cavity is a linear cavity or an annular cavity, and a light amplifier (5) is arranged in the cavity. The photonic filter comprises a tunable light source (1), a phase modulator (2), a circulator (3), a common fiber bragg grating (4), the light amplifier (5), the phase shift fiber bragg grating (6), an photoelectric detector (7) and a coupler (8). In the linear cavity, the tunable light source (1), the phase modulator (2), the common fiber bragg grating (4), the light amplifier (5), the phase shift fiber bragg grating (6) and the photoelectric detector (7) are connected in sequence to form a microwave photonic filter. Broadband tuning of the single-passband microwave photonic filter can be achieved by being matched with the tunable light source (1) and the phase shift fiber bragg grating (6).

Description

technical field [0001] The invention belongs to the field of large-capacity microwave photonic communication, and in particular provides a broadband-tunable high-Q single-passband microwave photonic filter device based on a phase-shifted fiber grating active cavity, and particularly relates to directly processing microwave signals in the optical domain. Background technique [0002] With the development trend and integration of broadband optical network and wireless network in the future, and the rapid development of high-capacity information technology requirements, it is necessary to vigorously develop microwave photonics technology. Microwave photon technology combines the advantages of microwave technology and photon technology, making microwave and photon organically combined in concepts, devices, circuits and systems. The generation, transmission, control and processing of microwave and millimeter waves can be realized by photonic methods. Microwave photonic technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/34H04B10/90
Inventor 徐恩明潘时龙王飞李培丽
Owner NANJING UNIV OF POSTS & TELECOMM
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