1
David John DiGiovanni, Yoshihiro Emori, Michael Fishteyn, Clifford Headley: Optical fiber configuration for dissipating stray light. DFS Fitel, July 20, 2010: US07760978 (130 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 ...


2
Jane Bilecky Clayton, Lars Erik Eskildsen, Per Bang Hansen, Clifford Headley, William Alfred Reed: Method for making Ge-Doped optical fibers having reduced brillouin scattering. Lucent Technologies, December 22, 1998: US05851259 (28 worldwide citation)

In accordance with the invention, a Ge-doped optical fiber having reduced Brillouin scattering loss is made by modulating the tension applied to the fiber during draw. The draw tension is modulated between a low range 10-50 g and a high in the range 150-250 g. The result is SBS suppression with no s ...


3
David John DiGiovanni, Yoshihiro Emori, Michael Fishteyn, Clifford Headley: Optical fiber configuration for dissipating stray light. Furukawa Electric North America, Wendy W Koba, October 14, 2008: US07437046 (24 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 ...


4
Jean Christophe Bouteiller, Benjamin John Eggleton, Clifford Headley, Paul Steinvurzel: Multiwavelength cascaded raman resonator. Fitel USA, October 19, 2004: US06807338 (16 worldwide citation)

A multi-wavelength cascaded Raman resonator (“MWCRR”). The MWCRR has an optical source for pumping optical radiation centered around an input wavelength. The MWCRR further includes a Raman fiber having at least a first set of optical gratings for converting the pumped optical radiation to wavelength ...


5
David John DiGiovanni, Yoshihiro Emori, Michael Fishteyn, Clifford Headley: Optical fiber configuration for dissipating stray light. Furukawa Electric North America, Wendy W Kaba, Michael A Morra, Ann H LaFeir, August 31, 2010: US07787733 (13 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 ...


6
Khushvinder Brar, Clifford Headley, Jean Christopher Bouteiller, Jake Bromage: Single-source multiple-order raman amplifier for optical transmission systems. OFS Fitel, Lowenstein Sandler PC, April 13, 2004: US06721088 (13 worldwide citation)

In accordance with the invention, an optical fiber communication system comprising a source of optical signal channels and an optical fiber transmission line is provided with one or more single source, multiple-order Raman pumps downstream of the source. Each single source pump provides multiple-ord ...


7
Clifford Headley, Kenneth Lee Walker: Article comprising an improved rare earth-doped optical fiber laser. Lucent Technologies, Eugene E Pacher, September 14, 1999: US05953353 (10 worldwide citation)

At least some rare earth-doped optical fiber lasers are subject to self-pulsing and/or relatively high noise. We have found that these shortcomings can be eliminated if the cavity length of the fiber laser is increased, typically by inclusion of a length .LAMBDA. of rare earth-free conventional (sin ...


8
Stephen Gregory Grubb, Clifford Headley, Martin Heinrich Muendel, Janet Renee Pedrazzani, Bennett H Rockney, Thomas A Strasser: Fiber multimode laser with reduced noise. Lucent Technologies, Mathews Collins Shepherd Gould P A, September 8, 1998: US05805621 (9 worldwide citation)

Applicants have discovered that the intermodal beat noise of a fiber multimode laser can be substantially reduced by providing the fiber with an output coupler of broadened bandwidth. In a preferred embodiment, a reduced-noise, high power light source comprises a cladding pumped fiber laser having a ...


9
Akheelesh Abeeluck, Benjamin Eggleton, Clifford Headley, Abds Sami Malik, Stephan Wielandy: Filled-core optical fiber and method of making the same. Fitel U, Wendy W Koba, December 28, 2004: US06836606 (8 worldwide citation)

A filled-core optical fiber and method where the optical fiber is collapsed at opposing ends subsequent to the active optical material being introduced into the hollow core region. The collapsing-functions to “pinch off” the active material (which may be a liquid or solid) within the fiber structure ...


10
Clifford Headley, Marc Mermelstein: Wide band Raman amplifiers. Fitel USA, Peter V D Wilde, June 8, 2004: US06748136 (8 worldwide citation)

The specification describes a distributed Raman amplifier with multiple pump sources for wide band amplification of wavelength division multiplexed (WDM) signals. It was recognized that using multiple pump sources introduces non-linear effects, such as four wave mixing (FWM). These effects are reduc ...



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