Article comprising a micro-structured optical fiber, and method of making such fiber
February 14, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3622291 3902879 3920312 Optical fibre with enhanced security Optical wave guide sheet comprising plurality of doubly-clad core members with light scatterers in outer cladding Low index of refraction optical fiber with tubular core and/or cladding Partially detached core optical waveguide Multicore hollow optical fiber and a method for preparation thereof Rare earth element-doped multiple-core optical fiber, method for fabricating the same, and optical amplifier using the same Tunable optical coupler using photosensitive glass InventorsApplicationNo. 799311 filed on 02/14/1997US Classes:385/127, Concentric65/428, Collapsing tube385/125Utilizing nonsolid core or claddingExaminersPrimary: Lee, John D.Attorney, Agent or FirmForeign Patent References
International ClassG02B 006/22AbstractDisclosed are non-periodic microstructured optical fibers that guide radiation by index guiding. By appropriate choice of core region and cladding region, the effective refractive index difference Ɗ between core region and cladding can be made large, typically greater than 5% or even 10 or 20%. Such high Ɗ results in small mode field diameter of the fundamental guided mode (typically<2.5 μm), and consequently in high radiation intensity in the core region. Exemplarily, a fiber according to the invention has a solid silica core region that is surrounded by an inner cladding region and an outer cladding region. The cladding regions have capillary voids extending in the axial fiber direction, with the voids in the outer cladding region having a larger diameter than those in the inner cladding region, such that the effective refractive index of the outer cladding region is greater than that of the inner cladding region. Non-periodic microstructured fiber potentially has many uses, e.g., as dispersion compensating fiber (with or without dispersion slope compensation), as amplifying fiber, as laser, as saturable absorber, for fiber gratings, and for non-linear elements. A method of making microstructured fiber is also disclosed.Other References
Field of SearchOPTICAL FIBER WAVEGUIDE WITH CLADDINGWith graded index core or cladding Utilizing nonsolid core or cladding Utilizing multiple core or cladding Concentric Process of manufacturing optical fibers, waveguides, or preforms thereof Collapsing tube With fiber stretching, drawing, or pulling (e.g., from rod, etc.) | |
