title: Wavelength interrogation of fiber Bragg grating sensors using tapered hollow Bragg waveguides.
abstract: We describe an integrated system for wavelength interrogation, which uses tapered hollow Bragg waveguides coupled to an image sensor. Spectral shifts are extracted from the wavelength dependence of the light radiated at mode cutoff. Wavelength shifts as small as ~10  pm were resolved by employing a simple peak detection algorithm. Si/SiO₂-based cladding mirrors enable a potential operational range of several hundred nanometers in the 1550 nm wavelength region for a taper length of ~1  mm. Interrogation of a strain-tuned grating was accomplished using a broadband amplified spontaneous emission (ASE) source, and potential for single-chip interrogation of multiplexed sensor arrays is demonstrated.
authors.forename: C
authors.initials: C
authors.lastname: Potts
authors.forename: T W
authors.initials: TW
authors.lastname: Allen
authors.forename: A
authors.initials: A
authors.lastname: Azar
authors.forename: A
authors.initials: A
authors.lastname: Melnyk
authors.forename: C R
authors.initials: CR
authors.lastname: Dennison
authors.forename: R G
authors.initials: RG
authors.lastname: DeCorby
mesh_terms: D055100:Optical Fibers; D061848:Optical Imaging; D055620:Optical Phenomena