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Microwave photon filter based on multi-wavelength fiber laser and chirp Bragg gratings

A fiber laser and chirped Bragg technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problem of small free spectrum range, expand the free spectrum range, realize free spectrum range, and reduce delay poor effect

Inactive Publication Date: 2015-09-23
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is mainly to solve the problem that the existing microwave photon filter has a small free spectrum range, and proposes a microwave photon filter based on a multi-wavelength fiber laser and a chirped Bragg grating. The output of the wavelength laser is used as the light source, which reduces the complexity of the system. The output light source is apodized by using a spectral shaper, which changes the tap coefficient of the light source.

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  • Microwave photon filter based on multi-wavelength fiber laser and chirp Bragg gratings
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  • Microwave photon filter based on multi-wavelength fiber laser and chirp Bragg gratings

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Embodiment Construction

[0020] Such as figure 1 As shown, the present invention includes a multi-wavelength fiber laser 10, a spectrum shaper 11, a 1:99 optical coupler C12, a spectrum analyzer 13, a phase modulator 14, a radio frequency signal generator 15, an optical circulator A16, a chirped Bragg grating 17. Optical circulator B18, fiber Bragg grating array 19, photodetector 20, radio frequency signal analyzer 21. Among them, the multi-wavelength fiber laser 10 includes an erbium-doped fiber amplifier 1, a single-mode fiber 2, an optical isolator 4, a polarization controller B6, a coupler 8, and a Sagnac composed of a polarization-maintaining fiber 3, a polarization controller 5, and a coupler A7. Ring 9. Its connection relationship is as follows: multi-wavelength fiber laser 10 composed of erbium-doped fiber amplifier 1, single-mode fiber 2, optical isolator 4, polarization controller B6, optical coupler B8, and Sagnac ring 9 is connected to generate multi-wavelength laser from the optical The...

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Abstract

The invention discloses a microwave photon filter based on a multi-wavelength fiber laser and chirp Bragg gratings, belongs to the field of microwave photon filters and particularly relates to a microwave photon filter for free spectral range multiplying. In the fiber laser, a Sagnac ring optical filter composed of a polarization maintaining optical fiber, a polarization controller and a coupler has a wavelength selection function and an apodizing function, and stable multi-wavelength output with the basically-same power is obtained by selecting a proper frequency stabilizing device. A fiber Bragg grating array serves as a time delay unit, the reflection wavelengths of the gratings correspond to the output wavelengths of a multi-wavelength laser respectively, the center distances between the adjacent gratings are the same, and thus the time delay differences generated between taps are the same. The chirp Bragg gratings are introduced so that the time delay differences between the taps are reduced, under the condition that the suppression ratio of a main lobe and a side lobe is kept unchanged, the radio frequency response for free spectral range multiplying is obtained, and the free spectral range is greatly enlarged.

Description

technical field [0001] The invention belongs to the field of microwave photon filters, in particular to microwave photon filters with multiplied free spectrum range. Background technique [0002] As an emerging discipline, microwave photonics has established a bridge between optical signal processing and microwave engineering. Compared with traditional electronic methods, microwave photonics has significant advantages in low loss, anti-electromagnetic interference, broadband processing, reconfigurability and tunability, etc. It has broken through the bottleneck of electronic equipment and attracted more and more researchers in recent years. scholars' attention. Optical microwave signal processing, optically generated microwaves, optically controlled phased array antennas, and wireless over optical are different applications of microwave photonics. Microwave photonic filters have significant applications in radio astronomy and radar systems due to their unique properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01H01S3/067
CPCG02F1/0115H01S3/06712H01S3/0675H01S3/06754
Inventor 曹晔赵爱红童峥嵘
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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