David John DiGiovanni, Ashish Madhukar Vengsarkar, Jefferson Lynn Wagener, Robert Scott Windeler: Article comprising a micro-structured optical fiber, and method of making such fiber. Lucent Technologies, Eugen E Pacher, September 1, 1998: US05802236 (212 worldwide citation)

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% ...

David John DiGiovanni, Yoshihiro Emori, Michael Fishteyn, Clifford Headley: Optical fiber configuration for dissipating stray light. DFS Fitel, July 20, 2010: US07760978 (146 worldwide citation)

An optical transmission fiber is formed to include a relatively low-index, relatively thin outer cladding layer disposed underneath the protective polymer outer coating. Stray light propagating along an inner cladding layer(s) within the fiber will be refracted into the thin outer cladding (by prope ...

David John DiGiovanni, Andrew John Stentz: Tapered fiber bundles for coupling light into and out of cladding-pumped fiber devices. Lucent Technologies, Mathews Collins Shepherd & Gould P A, January 26, 1999: US05864644 (136 worldwide citation)

In accordance with the invention, light is coupled from a plurality of semiconductor emitters to a cladding-pumped fiber via tapered fiber bundles fusion spliced to the cladding-pumped fiber. Individual semiconductor broad stripe emitters can be coupled to individual multimode fibers. The individual ...

David John DiGiovanni: Cladding-pumped fiber structure. Lucent Technologies Incorporated, George S Indig, October 12, 1999: US05966491 (86 worldwide citation)

A cladding-pumped fiber structure, suitable for use as a laser, provides for efficient clad-to-core energy transfer. The outside interface of the pump-clad is constructed from a rod-shaped preform by local melt-displacement using an open flame.

David John DiGiovanni: Cladding-pumped fiber structures. Lucent Technologies, Mathews Collins Shepherd & Gould P A, September 7, 1999: US05949941 (70 worldwide citation)

A cladding-pumped fiber structure is disclosed in which mode mixing of pump light injected into the fiber is induced by index modulation. In one embodiment, the index modulation is created by a stress-inducing region disposed in the cladding which simultaneously maintains the polarization within the ...

David John DiGiovanni, Robert Scott Windeler: Article comprising an air-clad optical fiber. Lucent Technologies, Eugen E Pacher, May 25, 1999: US05907652 (66 worldwide citation)

Optical fiber according to the invention comprises a core, with an inner cladding surrounding the core, and an outer cladding surrounding the inner one. The fiber comprises preform-derived glass. The outer cladding comprises a first outer cladding region between the inner cladding region and a secon ...

David John DiGiovanni, Stephen Gregory Grubb, Daryl Inniss, Ralph Stephen Jameson, Kenneth Lee Walker: Fiber light source with multimode fiber coupler. Lucent Technologies, Michael J Urbano, August 19, 1997: US05659644 (46 worldwide citation)

In an optical fiber light source a section of multimode fiber is interposed between an energizing laser (e.g,, a diode laser) and a single mode fiber active medium. In a preferred embodiment the single mode fiber active medium is surrounded by a multimode cladding coupled to the multimode fiber. The ...

David John DiGiovanni, Ashish Madhukar Vengsarkar: Article comprising a cladding-pumped optical fiber laser. Lucent Technologies, Eugen E Pacher, January 13, 1998: US05708669 (42 worldwide citation)

A cladding pumped optical fiber laser comprises a length of optical fiber having a rare earth-doped region of diameter d.sub.RE >d.sub.01 where d.sub.01 is the mode diameter of the LP.sub.01 mode of the fiber at the laser radiation at wavelength .lambda.. In one embodiment the fiber has a core diame ...

David John DiGiovanni, Justin Boyd Judkins, Janet Renee Pedrazzani, Ashish Madhukar Vengsarkar, Kenneth Lee Walker: Temperature insensitive long-period fiber grating devices. Lucent Technologies, Glen E Books, Eugen E Pacher, December 30, 1997: US05703978 (35 worldwide citation)

Applicants have determined that the temperature sensitivity of long-period grating devices is due to differential variation with temperature of the refractive indices of the core and cladding. They have further determined that the cladding profile and fiber composition can be redesigned to substanti ...

David John DiGiovanni, Frank Vincent DiMarcello, XinLi Jiang, George E Oulundsen, Sandeep Prabhakar Pandit: Multimode optical fibers with increased bandwidth. Furukawa Electric North America, Peter V D Wilde, May 9, 2006: US07043128 (33 worldwide citation)

The specification describes a technique for drawing circular core multimode optical fiber using twist during draw to increase fiber bandwidth.