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

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

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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 language	English
Publication status	Published - 15 Oct 2012
Event	22nd International Conference on Optical Fiber Sensors - Beijing, China Duration: 15 Oct 2012 → 19 Oct 2012

Conference

Conference	22nd International Conference on Optical Fiber Sensors
Abbreviated title	OFS2012
Country/Territory	China
City	Beijing
Period	15/10/12 → 19/10/12

Keywords

Palladium
LPG
Fiber Optic
Sensor

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Increased Sensitivity of Long Period Grating Hydrogen Sensors Through Coupling to Higher Order Cladding ModesAccepted author manuscript, 625 KB

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title = "Increased Sensitivity of Long Period Grating Hydrogen Sensors Through Coupling to Higher Order Cladding Modes",

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. ",

keywords = "Palladium, LPG, Fiber Optic, Sensor",

author = "Richard Carter and Maier, {Robert Raimund Josef} and Palas Biswas and Somnath Bandyopadhyay and Nandini Basumallick and Benjamin Jones and Scott McCulloch and James Barton",

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T1 - Increased Sensitivity of Long Period Grating Hydrogen Sensors Through Coupling to Higher Order Cladding Modes

AU - Carter, Richard

AU - Maier, Robert Raimund Josef

AU - Biswas, Palas

AU - Bandyopadhyay, Somnath

AU - Basumallick, Nandini

AU - Jones, Benjamin

AU - McCulloch, Scott

AU - Barton, James

PY - 2012/10/15

Y1 - 2012/10/15

N2 - 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.

AB - 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.

KW - Palladium

KW - LPG

KW - Fiber Optic

KW - Sensor

M3 - Poster

T2 - 22nd International Conference on Optical Fiber Sensors

Y2 - 15 October 2012 through 19 October 2012

ER -

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

Abstract

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