Reduced bend sensitivity and catastrophic bend loss in single mode optical fibers and method of making same
Номер патента: EP2288947A1
Опубликовано: 02-03-2011
Автор(ы): David J Digiovanni, John M. Fini, Peter I. Borel, Poul Kristensen
Принадлежит: OFS FITEL LLC
Опубликовано: 02-03-2011
Автор(ы): David J Digiovanni, John M. Fini, Peter I. Borel, Poul Kristensen
Принадлежит: OFS FITEL LLC
Реферат: An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region.
Method for manufacturing optical fiber parent material, and method for manufacturing optical fiber
Номер патента: US11667559B2. Автор: SATOSHI Tanaka,Tetsuya Haruna. Владелец: Sumitomo Electric Industries Ltd. Дата публикации: 2023-06-06.