Fabrication of optical fiber gratings through focused ion beam techniques for sensing applications

Jin Huang, Ammar Alqahtani, Jaime Viegas, Marcus S. Dahlem

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

9 Scopus citations

Abstract

Fiber Bragg gratings and long-period fiber gratings are widely used in optical communication systems and sensing applications. These structures are fabricated by UV-induced index changes along the core of a fiber, with fine control over the grating period and refractive index profile. Further flexibility and control over these structures can be achieved with focused ion beam (FIB) techniques, by fabricating fiber gratings through nano- and micro-machining. These FIB techniques enable the fabrication of gratings with larger index contrast and stronger interaction with environmental samples (ideal for chemical sensing applications). The sub-micron milling of the fibers allows modulating the refractive index with air voids, which can be filled with the sample fluid to be monitored. In this work we explore the design and fabrication of novel fiber grating configurations for sensing applications, inscribed on single-mode fibers using FIB. A single Fabry-Perot cavity is fabricated by milling a hole through the fiber (cladding and core), as well as a long-period grating based on a cascade of partially-etched-through cavities.

Original languageBritish English
Title of host publication2012 Photonics Global Conference, PGC 2012
DOIs
StatePublished - 2012
Event2012 Photonics Global Conference, PGC 2012 - Singapore, Singapore
Duration: 13 Dec 201216 Dec 2012

Publication series

Name2012 Photonics Global Conference, PGC 2012

Conference

Conference2012 Photonics Global Conference, PGC 2012
Country/TerritorySingapore
CitySingapore
Period13/12/1216/12/12

Keywords

  • fiber grating
  • focused ion beam
  • optical fiber sensor
  • sub-micron machining

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