title: Simple all-microstructured-optical-fiber interferometer built via fusion splicing.
abstract: We report a compact and stable all-microstructured-optical-fiber interferometer built with two fusion splices separated a few centimeters from each other. The air-holes of the fiber are intentionally collapsed in the vicinity of the splices. This broadens the propagating optical mode, allowing coupling of two modes in the section between the splices. A truly sinusoidal interference pattern was observed from 800 nm to 1600 nm with fringe visibility reaching 80%. The fringe spacing was inversely proportional to the distance between the splices. The potential of the device for sensing applications is demonstrated.
authors.forename: Joel
authors.initials: J
authors.lastname: Villatoro
authors.forename: Vladimir P
authors.initials: VP
authors.lastname: Minkovich
authors.forename: Valerio
authors.initials: V
authors.lastname: Pruneri
authors.forename: Gonçal
authors.initials: G
authors.lastname: Badenes