Surface plasmon resonance sensing in gaseous media with optical fiber gratings

• DOI: 10.1364/ol.43.002308
• Publication Date: 2018-05-07T20:45:31Z
• Authors: Álvaro González-Vila; Andreas Ioannou; Médéric Loyez; Marc Debliquy; Driss Lahem; Christophe Cauche...
• Keywords: Long-period fiber grating; Cladding (metalworking); Fiber Bragg Grating; Localized surface plasmon

Surface plasmon resonance excitation with optical fiber gratings has been typically studied in aqueous solutions. This work describes the procedure to excite a wave gaseous media and perform refractive index measurements these environments. Grating photo-inscription 193 nm excimer laser radiation allows us obtain slightly tilted Bragg exhibiting cladding mode comb along several hundreds of nanometers. Their sensitive range extends from gases liquids, so operation both is compared. We demonstrate that thickness metal coating required for surface roughly one third usually used liquids. The developed platforms exhibit temperature insensitive response 78 nm/RIU when tested different gases.