6533b7d5fe1ef96bd1265108
RESEARCH PRODUCT
Single-mode Bragg gratings in tapered few-modes and multimode fibers
Martina Delgado-pinarJose L. CruzA. CarrascosaMiguel V. AndrésAntonio DiezL. A. Herrera-piadRoberto Rojas-lagunasubject
multimode optical fibersMulti-mode optical fiberFabricationMaterials sciencebusiness.industrySingle-mode optical fiberUNESCO::FÍSICAPhysics::Optics02 engineering and technology021001 nanoscience & nanotechnologyCladding (fiber optics)01 natural sciencesAtomic and Molecular Physics and Optics010309 opticsOpticsFiber Bragg grating:FÍSICA [UNESCO]0103 physical sciencesInsertion lossFiber fabrication0210 nano-technologybusinessfiber Bragg gratingsExcitationfiber opticsdescription
We propose the implementation of fiber Bragg gratings in tapered few-mode and multimode fibers to accomplish single-mode operation by reducing the core diameter, while preserving the core-cladding structure. The gratings present a single reflection band, and the device shows low insertion losses after the taper fabrication and the fiber Bragg gratings inscription. The excitation of high-order odd modes in the core of the fiber has been identified as the main loss mechanism; it can be prevented by means of symmetric illumination of the fibers. We also demonstrate the excitation of high-order cladding modes (cladding-air modes) along the taper transitions; these modes can be removed without a significant increment of the insertion loss.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-01 |