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Wavelength drift detection device and method based on asymmetric π-phase-shifted fiber grating

A phase-shifting fiber grating and wavelength shifting technology, which is applied in the field of microwave photonics, can solve the problems of high cost and low measurement accuracy of wavelength shifting, and achieve the effects of improving accuracy, improving stability, and avoiding disturbance

Active Publication Date: 2021-05-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide a wavelength drift detection device and method based on an asymmetric π-phase-shift fiber grating, aiming to solve the problem of low measurement accuracy and high cost of the existing wavelength drift

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  • Wavelength drift detection device and method based on asymmetric π-phase-shifted fiber grating
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  • Wavelength drift detection device and method based on asymmetric π-phase-shifted fiber grating

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] A high-precision wavelength drift detection device based on an asymmetric π phase-shift fiber grating according to an embodiment of the present invention, its structural diagram is as follows figure 1 As shown, it includes a tunable laser light source (101), a first polarization controller (102), a phase modulator (103), a signal generator (104), a second polarization controller (105), an...

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Abstract

The invention belongs to the field of microwave photonics, and discloses a wavelength shift detection device and method based on an asymmetric π-phase-shift fiber grating. The invention can realize tunable single-sideband signal modulation by adopting technologies such as phase modulation, asymmetric π-phase-shift fiber grating filtering, optical path amplification, temperature control, etc. In the reflection area of ​​the fiber grating, the reflected signal will generate a beat frequency in the photodetector, and the change of the beat frequency is used to detect the wavelength shift of the reflection spectrum of the erbium-doped fiber Bragg grating caused by the pumping. Through this method combined with the microwave field, high-precision wavelength drift measurement can be performed, and the test results show that the system's wavelength drift measurement accuracy is 0.008nm, and it is expected to be further improved.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and more specifically relates to a wavelength drift detection device and method based on an asymmetric π phase shift fiber grating. Background technique [0002] In recent years, optical fiber communication with optical signal as the carrier and optical fiber as the medium has been extensively studied by scholars at home and abroad, and with the application of various multiplexing and advanced coding technologies, optical interconnection transmission represented by optical fiber communication has transmission It has the advantages of large bandwidth, low transmission loss, high transmission rate and long transmission distance. Microwave photonics combines the signals in the optical field and the microwave field to amplify the advantages of each other, which has aroused the research interest of many scholars and has broad application prospects. [0003] The application of fiber gratings in opti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J9/00G01M11/02H01S3/067
CPCG01J9/00G01M11/02H01S3/06712H01S3/0675
Inventor 孙军强开丽
Owner HUAZHONG UNIV OF SCI & TECH
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