Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1997-02-14
1998-09-01
Lee, John D.
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
65428, 385125, G02B 622
Patent
active
058022368
ABSTRACT:
Disclosed 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 .DELTA. between core region and cladding can be made large, typically greater than 5% or even 10 or 20%. Such high .DELTA. results in small mode field diameter of the fundamental guided mode (typically<2.5 .mu.m), 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.
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DiGiovanni David John
Vengsarkar Ashish Madhukar
Wagener Jefferson Lynn
Windeler Robert Scott
Lee John D.
Lucent Technologies - Inc.
Pacher Eugen E.
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