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Step-index profile
About: Step-index profile is a research topic. Over the lifetime, 3104 publications have been published within this topic receiving 53199 citations.
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Patent•
26 Sep 2012
TL;DR: A trench-assisted, multimode optical fiber as discussed by the authors includes a central core having an alpha refractive index profile with respect to an outer cladding, which achieves reduced bending losses and a high bandwidth.
Abstract: A trench-assisted, multimode optical fiber includes a central core having an alpha refractive index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth.
17 citations
Proceedings Article•
24 Apr 1989TL;DR: One of the important parameters in the design of high power lasers is the nonlinear refractive index n2 defined by the expression n = n0 + n2(E2), where n 0 is the familiar linear index and E is the optical electric field.
Abstract: One of the important parameters in the design of high power lasers is the nonlinear refractive index n2 defined by the expression n = n0 + n2(E2), where n0 is the familiar linear index and E is the optical electric field.
17 citations
Patent•
25 Feb 2013
TL;DR: A few mode optical fiber comprising: a Ge-free core having an effective area Aeff of LP01 mode wherein 120 μm2 ΔrMIN; and |Δ0−ΔOuter-Clad|>0.05%, the relative refractive index profile of the optical fiber was selected to provide attenuation of 1600 nm as mentioned in this paper.
Abstract: A few mode optical fiber comprising: a Ge-free core having an effective area Aeff of LP01 mode wherein 120 μm2 ΔrMIN; and |Δ0−ΔOuter-Clad|>0.05%, the relative refractive index profile of the optical fiber is selected to provide attenuation of 1600 nm.
17 citations
Patent•
07 Aug 2009TL;DR: In this paper, a photonic bandgap fiber of the present invention functions as a polarization maintaining fiber, and includes: a core made from a solid material; a cladding provided around the core; a periodic structure region which is provided in a part of the cladding in a vicinity of the core and in which a plurality of high refractive index parts with a refractive ratio higher than that of cladding are arranged in a periodic structures.
Abstract: A photonic bandgap fiber of the present invention functions as a polarization maintaining fiber, and includes: a core made from a solid material; a cladding provided around the core; a periodic structure region which is provided in a part of the cladding in a vicinity of the core and in which a plurality of high refractive index parts with a refractive index higher than that of the cladding are arranged in a periodic structure; a low refractive index region which is provided in another part of the cladding in a vicinity of the core and has an average refractive index lower than that of the core; and stress applying parts which are provided in a part of the low refractive index region close to the periodic structure region and have a thermal expansion coefficient different from that of another part of the low refractive index region.
17 citations
Patent•
30 Jul 2002TL;DR: An optical fiber comprising a core and a cladding region which covers an outer periphery of the core, having a zero-dispersion wavelength in a wavelength range of 1.4 μm to 1.65 μm, was considered in this article.
Abstract: An optical fiber comprising a core and a cladding region which covers an outer periphery of the core, having a zero-dispersion wavelength in a wavelength range of 1.4 μm to 1.65 μm, and being in a single mode in that zero-dispersion wavelength, wherein GeO 2 is doped in the core in a quantity such that a relative refractive index difference of the core becomes not less than 1.8%, the cladding region includes first, second, and third cladding regions, and a refractive index of the second cladding region is smaller than those of the first cladding region and the third cladding region.
17 citations