Increased Sensitivity of Long Period Grating Hydrogen Sensors Through Coupling to Higher Order Cladding Modes

Richard Carter, Robert Raimund Josef Maier, Palas Biswas, Somnath Bandyopadhyay, Nandini Basumallick, Benjamin Jones, Scott McCulloch, James Barton

Research output: Contribution to conferencePoster

2 Citations (Scopus)
67 Downloads (Pure)

Abstract

We investigate the phase matching conditions and sensitivities of higher order metal jacketed long period gratings (LPGs). These higher order modes have been previously demonstrated to have flatter, and therefore more sensitive, phase matching conditions leading up to the phase matching turning point. We demonstrate this increased sensitivity as applied to a Pd jacketed LPG hydrogen sensor illustrating an improvement in both the refractive index and temperature sensitivity (of the 17th order mode) of an order of magnitude over the lower order (1st-9th) modes.
Original languageEnglish
Publication statusPublished - 15 Oct 2012
Event22nd International Conference on Optical Fiber Sensors - Beijing, China
Duration: 15 Oct 201219 Oct 2012

Conference

Conference22nd International Conference on Optical Fiber Sensors
Abbreviated titleOFS2012
CountryChina
CityBeijing
Period15/10/1219/10/12

Keywords

  • Palladium
  • LPG
  • Fiber Optic
  • Sensor

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