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Optical fibre for use in a system for detection of one or more compounds in a fluid

  • US 10,451,549 B2
  • Filed: 05/16/2016
  • Issued: 10/22/2019
  • Est. Priority Date: 05/18/2015
  • Status: Active Grant
First Claim
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1. A system for detection of one or more compounds in a fluid, the system comprising:

  • an optical fibre comprising;

    a light entrance, andat least two binding portions separated from each other along a longitudinal direction of the optical fibre, whereineach of the at least two binding portions comprises;

    a plasmonic structure and/or a SERS structure, anda binding material for binding one or more compounds,at least two of the binding portions are arranged for binding a same compound or compounds,the binding material is arranged on the plasmonic structure and/or the SERS structure,the optical fibre is arranged for receiving light and transmitting light to each of the at least two binding portions, andeach of the at least two binding portions is arranged such thatlight transmitted through that binding portion without bound compound is different compared to light transmitted through that binding portion with bound compound, orlight reflected back from that binding portion without bound compound is different compared to light reflected back from that binding portion with bound compound;

    a light source arranged for transmitting light through the light entrance into the optical fibre and thereby to each of the at least two binding portions, the light source being a pulsed light source; and

    an optical time-domain reflectometer (OTDR) that includes a time resolving detector, wherein the time resolving detector is configured to detect light reflected from each binding portion of the at least two binding portions separately.

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