Spectrally selective investigation on optical losses in multimode fibers with loop resonators
Authors: Giorgini A., Zullo R., D’Ambrosio D., Avino S., Malara P., De Natale P., Gagliardi G.
Autors Affiliation: CNR-Istituto Nazionale di Ottica (INO), Via Campi Flegrei 34, Complesso A. Olivetti, Pozzuoli (Napoli), 80078, Italy; CNR-Istituto Nazionale di Ottica (INO), Largo Enrico Fermi 6, Firenze, 50125, Italy
Abstract: A technique for the selective characterization of the losses of the transverse modes propagating in a multimode fiber is presented. The method is based on the implementation of a fiber ring cavity which introduces a frequency discrimination among the resonances of the different modes, thus allowing to investigate them separately. Each mode is excited by locking the laser frequency on the corresponding cavity resonance, and its losses are measured from the average photon lifetime with a ring-down technique. Two different distributions of transverse modes, obtained by controlling the injection of the multimode fiber at the cavity input port, are investigated. The technique is proposed as a complementary approach for the characterization of multimode fiber propagation and intermodal power exchange effects.
Conference title: 2015 Fotonica AEIT Italian Conference on Photonics Technologies
KeyWords: Fibers; Laser mode locking; Locks (fasteners); Optical losses; Photonics; Resonators, Cavity resonances; Different distributions; Fiber loops; Fiber propagation; Fiber ring cavity; Frequency discrimination; Loop resonators; Spectral selection; Multimode fibersDOI: 10.1049/cp.2015.0119