Spectroscopic analysis with a monolithic micro-structured microsphere fiber probe

Stephen Holler, Bernadette Haig, Ryan Riviere, Marissa Vaccarelli, Michael J. Donovan, Maximillino Sobrero, Brett A. Miles, Martin A. Sanzari

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A microsphere-fiber probe used for spectroscopic analysis of material samples is presented. The monolithic structure is formed by melting the end of a section of optical fiber forming a bead at the distal end of the fiber. Light guided through the fiber and emerges from the sphere focusing to a point beyond the surface. Raman scattering is used to demonstrate the efficacy of the probe, which operates in a bidirectional manner efficiently collecting the scattered light, re-imaging it back into the waveguide, and transmitting it to a spectrometer for dispersion. The probe demonstrates an order of magnitude improvement over the spatial resolution conventional fiber probes. This improvement in spatial resolution and corresponding collection efficiency will aid in critical analyses such as cancer margin detection and material characterization.

Original languageEnglish
Title of host publicationAdvanced Environmental, Chemical, and Biological Sensing Technologies XV
EditorsTuan Vo-Dinh
PublisherSPIE
ISBN (Electronic)9781510626799
DOIs
StatePublished - 2019
EventAdvanced Environmental, Chemical, and Biological Sensing Technologies XV 2019 - Baltimore, United States
Duration: 14 Apr 201916 Apr 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11007
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdvanced Environmental, Chemical, and Biological Sensing Technologies XV 2019
Country/TerritoryUnited States
CityBaltimore
Period14/04/1916/04/19

Keywords

  • Raman spectroscopy
  • cancer
  • characterization
  • epoxy
  • lasers
  • tissue diagnostics

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