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Tilted Fiber Bragg Gratings: From Multiparametric Sensors to Plasmonic Biosensors

Hosted By: Optical Biosensors Technical Group

07 September 2023 10:00 - 11:00

Eastern Time (US & Canada) (UTC - 05:00)

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Fiber Bragg gratings correspond to a periodic and permanent refractive index modulation of the fiber core along the propagation axis. They are inherently sensitive to temperature and axial strain. The technology is highly mature nowadays and several tens of companies sell fiber Bragg grating sensors and interrogators worldwide.

Tilted fiber Bragg gratings can be considered as specialty gratings for which the refractive index modulation is slightly angled with respect to the perpendicular to the optical fiber axis. They are able to couple light from the fiber core to the cladding and are therefore strongly sensitive to surrounding refractive index changes.

In this webinar hosted by the Optical Biosensors Technical Group, Christophe Caucheteur will review their main spectral features and show their typical response to temperature, strain and surrounding refractive index changes. Dr. Caucheteur will then focus on their use as biosensors, especially when they are surrounded by a thin metal layer and used as label-free plasmonic sensors. To that particular aim, bioreceptors are grafted on the gold surface and they attract the analytes (proteins or cells) of interest.

What You Will Learn:
• What is a tilted fiber Bragg grating and how can it be manufactured and interrogated?
• What are the sensing modalities of tilted fiber Bragg gratings?
• How can tilted fiber Bragg gratings excite a plasmon wave and be used as plasmonic biosensors?

Who Should Attend:
• All people interested in fiber Bragg gratings
• All master/PhD students active in biochemical fiber sensing

About the Presenter: Christophe Caucheteur from the University of Mons

Christophe Caucheteur is head of the Advanced Photonic Sensors ERC Unit at the University of Mons in Belgium. He holds a master degree in electrical engineering (2003) and PhD degree in applied sciences (2007) from the Faculté Polytechnique de Mons. He was recipient of an ERC Starting grant from 2011 to 2016. His research activities focus on the study and development of fiber Bragg grating sensors, especially plasmonic biosensors based on gold-coated tilted fiber Bragg gratings. He is regularly involved in the organization of international events, including the co-chairing of EWOFS (European Workshop on Optical fibre Sensors) in 2023 and the technical program co-chairing of BGPP (Bragg Gratings, Photosensitivity and Poling in optical materials and waveguides) in 2024.

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