Optical Fiber Immunosensor Based on Long Period Gratings Built by Periodic Laser Ablation

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Abstract

An optical fiber immunosensor based on long period gratings (LPGs) made by periodic laser ablation is presented in this work. In order to be able to modify the effective index of the fundamental and the cladding modes, a cladding-etched SMF (CE-SMF) was coated with tin dioxide and after that the grating was created by periodic ablation of the overlay. Type G immunoglobulins (IgGs) were attached to (3-glycidyloxypropyl) trimethoxysilane (GPTMS) overlay. Samples with anti-IgGs concentrations ranging from 1 mg/L to 100 mg/L have been studied and a maximum sensitivity of 1.2 nm/(mg/L) was obtained. There is still room for the improvement of this optical platform.

Original languageEnglish
Title of host publication2018 IEEE SENSORS, SENSORS 2018 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538647073
DOIs
Publication statusPublished - 26 Dec 2018
Externally publishedYes
Event17th IEEE SENSORS Conference, SENSORS 2018 - New Delhi, India
Duration: 28 Oct 201831 Oct 2018

Publication series

NameProceedings of IEEE Sensors
Volume2018-October
ISSN (Print)1930-0395
ISSN (Electronic)2168-9229

Conference

Conference17th IEEE SENSORS Conference, SENSORS 2018
Country/TerritoryIndia
CityNew Delhi
Period28/10/1831/10/18

Keywords

  • GPTMS
  • chemical etching
  • immunosensor
  • laser ablation
  • long period gratings
  • optical fiber
  • vacuum evaporation

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