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Ultra-weak fiber grating wavelength demodulation module

A fiber grating and wavelength demodulation technology, which is applied in the direction of using optical devices to transmit sensing components, can solve problems such as inability to meet engineering application scenarios, slow demodulation speed, and large volume, avoiding the problem of multiple joints, reducing weight, Small size effect

Pending Publication Date: 2022-07-15
宜昌睿传光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For the existing demodulation equipment, the demodulation speed is slow, the volume is large, and the power consumption is high, which cannot meet the problems of engineering application scenarios

Method used

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  • Ultra-weak fiber grating wavelength demodulation module
  • Ultra-weak fiber grating wavelength demodulation module
  • Ultra-weak fiber grating wavelength demodulation module

Examples

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Embodiment Construction

[0065] The invention provides an ultra-weak fiber grating wavelength demodulation module. The embodiments are described below with reference to the accompanying drawings.

[0066] The laser pulse generator 1 includes a wavelength scanning laser 101 capable of outputting pulses, a first power interface 102, a first control interface 103 and a first output optical interface 104;

[0067] The optical circuit unit 2 includes optical pulse amplification, optical path selection and photoelectric conversion devices, as well as a first input optical interface 205, a second power interface 206, a second control interface 207, a first electrical signal output interface 208, a second Output optical interface 209 , wherein the first input optical interface 205 is coupled with the first output optical interface 104 .

[0068] The embedded board 3 includes an embedded system and acquisition circuit for wavelength demodulation calculation, position positioning and peripheral control, as wel...

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Abstract

An ultra-weak fiber grating wavelength demodulation module comprises a shell, a laser pulse generator, an optical line unit and an embedded board card are arranged in the shell, the embedded board card is respectively connected with the laser pulse generator and the optical line unit, and the laser pulse generator is connected with the optical line unit. And the laser pulse generator is used for generating laser pulses with repeatedly changed wavelengths. And the optical circuit unit is used for amplifying and outputting the laser pulse, receiving an optical signal returned by the measured object, completing photoelectric conversion and then outputting the optical signal. The embedded board card is used for performing instruction and parameter setting on the laser pulse generator and configuring the optical circuit unit; and the embedded board card is used for grating positioning and wavelength real-time analysis, and outputting the wavelength and position information of the ultra-weak grating. The pulse type wavelength scanning laser is adopted to replace a light source and a light modulator, and an optical circuit is integrally designed, so that the system structure is simplified, the power consumption and the size of the demodulator are greatly reduced, and the demodulation speed is improved.

Description

technical field [0001] The invention relates to the field of fiber grating sensing, in particular to an ultra-weak fiber grating wavelength demodulation module. Background technique [0002] Fiber Bragg grating sensors have been widely used in structural safety, security monitoring and other occasions due to their high precision, light weight, corrosion resistance, anti-electromagnetic interference and a series of advantages. Ultra-weak fiber gratings (hereinafter referred to as "ultra-weak gratings") are a general term for gratings with a reflectivity lower than 0.1%. Thousands of gratings can be multiplexed at a single wavelength, which greatly improves the multiplexing capacity of fiber gratings. With the maturity and popularization of the large-scale fabrication technology of ultra-weak gratings, its advantages of large capacity, high strength, and simple fabrication have been gradually recognized, and have been rapidly promoted in civil engineering, rail transit, and fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26G01D5/353G01D5/38
CPCG01D5/268G01D5/353G01D5/38
Inventor 罗志会黄江楼谭超郑胜蔡德所田斌徐冰何慧灵
Owner 宜昌睿传光电技术有限公司
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