title: Quasi-distributed and wavelength selective addressing of optical micro-resonators based on long period fiber gratings.
abstract: A novel all-in-fiber method for coupling light to high-Q silica whispering gallery mode (WGM) optical micro-resonators is presented, which is based on a pair of long period fiber gratings (LPGs) written in the same silica fiber, along with a thick fiber taper (15-18 μm in waist) in between the LPGs. The proposed coupling structure is robust and can be replicated many times along the same fiber simply cascading LPGs with different bands. Typical Q-factors of the order of 10(8) and total coupling efficiency up to 60% were measured collecting the resonances of microspheres or microbubbles at the fiber end. This approach uniquely allows quasi-distributed and wavelength selective addressing of different micro-resonators along the same fiber.
authors.forename: D
authors.initials: D
authors.lastname: Farnesi
authors.forename: F
authors.initials: F
authors.lastname: Chiavaioli
authors.forename: F
authors.initials: F
authors.lastname: Baldini
authors.forename: G C
authors.initials: GC
authors.lastname: Righini
authors.forename: S
authors.initials: S
authors.lastname: Soria
authors.forename: C
authors.initials: C
authors.lastname: Trono
authors.forename: G Nunzi
authors.initials: GN
authors.lastname: Conti