Spontaneous Brillouin scattering optical time domain reflectometer based on superconductive nanowire single-proton detector

A technology of single photon detector and optical time domain reflectometer, which is applied in the field of optical fiber sensor network, can solve the problem of weak back Brillouin scattering signal detection ability is limited, no superconducting nanowire single photon detector, resolution It is difficult to improve the rate at the same time, so as to solve the problem of improving the spatial resolution and measurement accuracy at the same time, improving the spatial resolution and measurement accuracy, and improving the dynamic range.
CN102506904BInactive Publication Date: 2014-05-21NANJING UNIV
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2014-05-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a spontaneous Brillouin scattering optical time domain reflectometer (BOTDR) based on a superconductive nanowire single-proton detector, which is characterized in that an optical pulse emitted by an optical pulse generating unit is coupled to a sensing optical fiber through a circulator, backward scattered light scattered from the sensing optical fiber is subjected to filtration of rayleigh scattering light through an optical filter unit to obtain Brillouin scattering light, a back scattering light signal is detected by the superconductive nanowire single-proton detector, an electric signal output from the superconductive nanowire single-proton detector is acquired and processed by a data acquiring and processing unit, and finally, a result is obtained through a certain demodulation relation. Compared with the traditional BOTDR, the BOTDR provided by the invention is used for carrying out data acquisition and processing by adopting the noise equivalent power (NEP) low / no-bandwidth-limit superconductive nanowire single-proton detector as a detection unit and adopting a single-proton counting technology.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a self-Brillouin scattered light time-domain reflectometer based on a superconducting nanowire single-photon detector, which is mainly used in the technical field of optical fiber sensor networks. Background technique

[0002] In the current fully distributed optical fiber sensing technology, the fully distributed optical fiber sensing technology based on Brillouin scattering can realize long-distance continuous distributed measurement of temperature and strain in optical fibers, and can be applied to large buildings, highways, tunnels The monitoring and measurement of the health status of bridges, dams, communication cables, oil and gas pipelines, etc. has broad application prospects. Compared with other distributed optical fiber sensors, BOTDR based on self-published scattered optical time domain reflectometer has the advantages of single-ended sensing measurement and simultaneous sensing of temperature and strain. Brillouin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More