Multi-wavelength multiplex optical fibre sensor and method for optical signal transmission

Abstract

The invention discloses a multi-wavelength multioptical-fiber sensor, which comprises the following parts: optical upper and lower path mode element (OADM), optical power modulation-type optical-fiber sensor and optical-fiber face reflective element, wherein the wavelength lower port of OADM element connects the input end of optical power modulation-type optical-fiber sensor to realize the multi-wavelength optical signal selection of input port, which realizes the optical signal downloading after the specific wavelength optical signal enters the optical power modulation-type optical-fiber sensor; the optical power modulation-type optical-fiber sensor transmits the measured physical quantity information into the strength variation of downloading signal; the input port optical-fiber face reflective element connects the output port of optical power modulation-type optical-fiber sensor to make the optical signal with the measured physical quantity information return back to the input port of OADM element, which realizes the uploading of optical signal; the input and output ports of OADM element are regarded as the external connection unit for the whole sensor unit.

Description

technical field [0001] The invention designs a multi-channel wavelength multiplexing technology of an optical fiber sensor array in an optical fiber sensor network, and in particular refers to a multi-wavelength multiplexing optical fiber sensor and a method for optical signal transmission. Background technique [0002] After more than 20 years of development, driven by optical fiber communication technology and optical fiber sensing technology, the multiplexing of optical fiber acceleration sensor arrays has produced a variety of different technical solutions, among which wavelength division multiplexing (WDM) is the solution to large-scale optical fiber transmission. An efficient method for distributed measurement using multiple sensors in a sensor network. [0003] With the rapid development of optical fiber communication technology, wavelength division multiplexing and dense wavelength division multiplexing are gradually becoming mature technologies, and the wavelength d...

AI Technical Summary

Problems solved by technology

Traditional optical fiber sensor network wavelength division multiplexing technology often only uses wavelength division multiplexing / demultiplexing devices at the beginning and end of the transmission part to realize single optical fiber transmission, and the core part of the sensor network is still carried by a single optical fiber. The signal of a sensor cannot effectively reduce the number of fiber channels used in the sensor network, thereby reducing the difficulty and cost of networking

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