title: Photonic-crystal-fiber-enabled micro-Fabry-Perot interferometer.
abstract: We report on the fabrication of a monolithic fiber Fabry-Perot interferometer whose cavity is a microscopic air bubble. The latter is formed when splicing together a conventional single-mode fiber and an index-guiding photonic crystal fiber with the standard arc-discharge technique. Spherical microcavities with diameters ranging from 20 to 58 microm were fabricated with such a technique. The interferometers exhibited low thermal sensitivity (less than 1.0 pm/ degrees C), high mechanical strength, broad operation wavelength range, and fringe contrast in the 8-12 dB range. The applications of the interferometers for strain sensing (up to 5000 micro(epsilon) is demonstrated.
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860, Castelldefels, Barcelona, Spain. joel.villatoro@icfo.es
authors.forename: Joel
authors.initials: J
authors.lastname: Villatoro
authors.forename: Vittoria
authors.initials: V
authors.lastname: Finazzi
authors.forename: Gianluca
authors.initials: G
authors.lastname: Coviello
authors.forename: Valerio
authors.initials: V
authors.lastname: Pruneri
mesh_terms: D000388:Air; D007368:Interferometry / Q000379:methods*; D017785:Photons; D013696:Temperature