title: Surface plasmon resonance sensor interrogation with a double-clad fiber coupler and cladding modes excited by a tilted fiber Bragg grating.
abstract: We present a novel optical fiber surface plasmon resonance (SPR) sensor scheme using reflected guided cladding modes captured by a double-clad fiber coupler and excited in a gold-coated fiber with a tilted Bragg grating. This new interrogation approach, based on the reflection spectrum, provides an improvement in the operating range of the device over previous techniques. The device allows detection of SPR in the reflected guided cladding modes and also in the transmitted spectrum, allowing comparison with standard techniques. The sensor has a large operating range from 1.335 to 1.432 RIU, and a sensitivity of 510.5 nm/RIU. The device shows strong dependence on the polarization state of the guided core mode which can be used to turn the SPR on or off.
authors: Mohamad Diaa
authors: MD
authors: Baiad
authors: Mathieu
authors: M
authors: Gagné
authors: Wendy-Julie
authors: WJ
authors: Madore
authors: Etienne
authors: E
authors: De Montigny
authors: Nicolas
authors: N
authors: Godbout
authors: Caroline
authors: C
authors: Boudoux
authors: Raman
authors: R
authors: Kashyap