Patrick W Wisk

8428409, Apr 23, 2013

May 11, 2010

12/777465

Jeffrey W. Nicholson - Warren NJ, US
Patrick W. Wisk - Green Brook NJ, US
Man F. Yan - Berkeley Heights NJ, US

OFS Fitel, LLC - Norcross GA

G02B 6/02

385123, 385127

An optical waveguide has a refractive index variation that is structured to provide the fiber, over a wavelength operating range, with an effective area supporting multiple Stokes shifts and with a negative dispersion value at a target wavelength within the wavelength operating range. The refractive index variation is further structured to provide the fiber with a finite LPcutoff at a wavelength longer than the target wavelength, whereby the LPcutoff wavelength provides a disparity, for a selected bending diameter, between macrobending losses at the target wavelength and macrobending losses at wavelengths longer than the target wavelength, whereby Raman scattering is frustrated at wavelengths longer than the target wavelength.

20200024176, Jan 23, 2020

Jan 7, 2019

16/241329

- Norcross GA, US
Patrick W. Wisk - Greenbrook NJ, US
Man F. Yan - Berkeley Heights NJ, US

OFS Fitel, LLC - Norcross GA

C03B 37/014
C03B 37/012
C03B 37/027

An optical preform manufacturing process is disclosed in which an alkali dopant is deposited between an optical fiber core rod and an optical fiber cladding jacket. Depositing the alkali dopant between the core rod and the cladding jacket permits diffusion of the alkali dopants into the core during fiber draw when the core and the cladding are at their respective transition (or vitrification) temperatures. Introduction of the alkali dopants between the core rod and the cladding jacket also permits decoupling of the alkali doping process from one or more of other optical preform manufacturing processes. The optical preform manufacturing process can also include placing alkali dopants between an optical fiber inner cladding jacket and an optical fiber outer cladding jacket to reduce the glass viscosity during fiber draw.

20180251397, Sep 6, 2018

Feb 2, 2018

15/886982

- Norcross GA, US
Peter I. Borel - Frederiksberg, DK
Tommy Geisler - Brondby, DK
Rasmus V.S Jensen - Frederiksberg, DK
Ole A. Levring - Virum, DK
Jorgen Ostgaard Olsen - Copenhagen, DK
David W. Peckham - Lawrenceville GA, US
Dennis J. Trevor - Clinton NJ, US
Patrick W. Wisk - Greenbrook NJ, US
Benyuan Zhu - Princeton NJ, US

OFS Fitel, LLC - Norcross GA

C03C 13/04
G02B 6/036
C03B 37/012
C03B 37/027
C03C 4/10
C03C 3/06

An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius.According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions. The fiber regions are doped with one or more viscosity-reducing dopants in respective amounts and radial positions that are configured to achieve viscosity matching among the fiber regions in the identified group.

20170022094, Jan 26, 2017

Mar 31, 2016

15/086169

- Norcross GA, US
Peter I. Borel - Frederiksberg, DK
Tommy Geisler - Brondby, DK
Rasmus V. Jensen - Frederiksberg, DK
Ole A. Levring - Virum, DK
Jorgen Ostgaard Olsen - Copenhagen, DK
David W. Peckham - Lawrenceville GA, US
Dennis J. Trevor - Clinton NJ, US
Patrick W. Wisk - Greenbrook NJ, US
Benyuan Zhu - Princeton NJ, US

OFS Fitel, LLC - Norcross GA

C03C 13/04
C03B 37/027
G02B 6/036

An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius.According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions. The fiber regions are doped with one or more viscosity-reducing dopants in respective amounts and radial positions that are configured to achieve viscosity matching among the fiber regions in the identified group.

20160170137, Jun 16, 2016

Nov 12, 2015

14/938914

- Norcross GA, US
Rasmus V.S. Jensen - Frederiksberg, DK
Ole A. Levring - Virum, DK
Jorgen Ostgaard Olsen - Copenhagen, DK
David W. Peckham - Lawrenceville GA, US
Dennis J. Trevor - Clinton NJ, US
Patrick W. Wisk - Greenbrook NJ, US
Man F. Yan - Berkeley Heights NJ, US

G02B 6/036
G02B 6/02

The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber). The inclusion of the annular stress accommodation region allows for the formation of a large effective area optical fiber that exhibits low loss (i.e.,

20160109651, Apr 21, 2016

Aug 13, 2015

14/825297

- Norcross GA, US
Rasmus V.S. Jensen - Frederiksberg, DK
Ole A. Levring - Virum, DK
Jorgen Ostgaard Olsen - Copenhagen, DK
David W. Peckham - Lawrenceville GA, US
Dennis J. Trevor - Clinton NJ, US
Patrick W. Wisk - Greenbrook NJ, US
Man F. Yan - Berkeley Heights NJ, US

G02B 6/036
C03B 37/027

The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (Le., forming a “low loss” optical fiber).

20080041111, Feb 21, 2008

Oct 22, 2007

11/975882

John MacChesney - Lebanon NJ, US
Thomas Stockert - Millburn NJ, US
Patrick Wisk - Greenbrook NJ, US
Man Yan - Berkeley Heights NJ, US

C03B 37/02
C03B 37/10
C03C 25/10

065427000, 065430000, 065435000

The specification describes the production of optical fibers and optical fiber preforms using Chemical Powder Deposition (CPD). In this process a slurry of silica powders and dopant powders in a liquid carrier is prepared and the inside surface of a silica glass starter tube is coated with the slurry, then dried. The coating is then consolidated and the tube collapsed as in the conventional MCVD process. Multiple coatings, and coatings with varying compositions, can be used to produce any desired profile. In an alternative embodiment, doped silica glass of the desired final composition is prepared, and then pulverized to form the powder for the slurry. In both embodiments, the use of powders of known composition in the slurry allows direct control over the final glass composition, as compared with conventional processes in which the composition in the final glass is indirectly controlled by control of the thermodynamics of a vapor phase reaction.