Patents by Inventor Bruce D. Campbell
Bruce D. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5199089Abstract: A strained distributed optical fiber distribution network includes read and write optical fibers having taps attached thereto in series so as to strain portions of the fiber in excess of 0.60%, the strained portions being environmentally isolated by an enclosure which includes gel filled seals subject to a resilient load.Type: GrantFiled: January 24, 1992Date of Patent: March 30, 1993Assignee: Raychem CorporationInventors: Bruce D. Campbell, Joseph Zucker, James E. Jervis
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Patent number: 5080506Abstract: An output of a light source coupled to an optical fiber is controlled by an apparatus comprising a mode stripper for stripping a first part of the optical signal from the cladding of the optical fiber, means for bending the optical fiber and withdrawing a second part of the optical signal from a core of the fiber downstream from the stripper, means for detecting the second part of the optical signal, and feedback means for using the detected second signal part to control an output of the light source to better linearize an amount of power injected into the fiber.Type: GrantFiled: May 20, 1988Date of Patent: January 14, 1992Assignee: Raynet Corp.Inventors: Bruce D. Campbell, Cathryn L. Ludtka-Peck, Robert J. Naidoff, Theodore Calderone
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Patent number: 5012475Abstract: An error compensation system is described which provides a linear laser signal. The error compensation system includes a first high power linear laser which is used to drive a signal onto an optical fiber. The signal on the optical fiber is tapped to provide a signal representative of the signal on the fiber. This tapped signal is compared with the original modulated signal to produce a control signal indicative of any error signal on the fiber. This control signal is inverted and used to drive a lower power laser which supplies an optical output indicative of the inverted error. By properly combining the original signal with an inverted error signal, a corrected signal may be detected from the fiber for distribution.Type: GrantFiled: April 17, 1990Date of Patent: April 30, 1991Assignee: Wavelength Lasers, Inc.Inventor: Bruce D. Campbell
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Patent number: 4983008Abstract: A strained distributed optical fiber distribution network includes read and write optical fibers having taps attached thereto in series so as to strain portions of the fiber in excess of 0.60%, the strained portions being environmentally isolated by an enclosure which includes gel filled seals subject to a resilient load.Type: GrantFiled: November 1, 1988Date of Patent: January 8, 1991Assignee: Raychem CorporationInventors: Bruce D. Campbell, Joseph Zucker
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Patent number: 4889403Abstract: An optical fiber read or write tap includes a substrate having a substantially flat upper surface on which two separated grooves are formed, a light element being disposed in the second groove so as to be capable of coupling light with a bent portion of an optical fiber disposed in the first groove.Type: GrantFiled: December 23, 1987Date of Patent: December 26, 1989Assignee: Raychem Corp.Inventors: Joseph Zucker, Nelson M. Shen, Bruce D. Campbell, Peder Rodhe, Tom Call
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Patent number: 4834482Abstract: An optical fiber coupler for injecting light into, and withdrawing light from, an optical fiber utilizes a deformable material (8) and a clamping member (4) which clamp a buffered optical fiber (6) therebetween. Both the clamping member and deformable material are curved causing the optical fiber to be bent when so clamped resulting in light coupling between an optical fiber core and the deformable material through the fiber buffer. The deformable material is substantially transparent and has an index of refraction substantially equal to that of an outer surface of the optical fiber. A light element has a surface embedded within the deformable material, and the deformable material and coupler are specifically formed so as to reduce microbend stresses induced in the fiber when so clamped so as to increase coupling efficiency.Type: GrantFiled: March 7, 1988Date of Patent: May 30, 1989Assignee: Raychem Corp.Inventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4822125Abstract: An optical fiber tap which is especially useful as a node in a ring topology data processing system. The tap, which does not interrupt the physical continuity of the fiber, has an open position and a closed position. In the open position, a signal passing down the optical fiber passes through the tap without alteration. In the closed position, a signal passing down the optical fiber is extracted through a first bend which is put into the fiber by the tap; the extracted signal, or an electrical counterpart thereof, is processed and a counterpart of the extracted signal, or a new signal obtained by operating on the extracted signal, e.g. in a data processor, is injected into the fiber through a second bend which is put into the fiber by the tap.Type: GrantFiled: February 27, 1987Date of Patent: April 18, 1989Assignee: Raychem Corp.Inventors: Penny L. Beals, Phyllis M. Simon, Bruce D. Campbell
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Patent number: 4822134Abstract: An optical fiber cable construction includes a first fiber marker which allows one initially to determine a linear length of the optical fiber between first and second points, and a second marker which allows one to determine a linear length of the fiber optical cable between the first and second points, thus ensuring that the length of the fiber initially exceeds the length of the cable during initial installation so as to minimize the chances of excessive temperature induced stress being imposed on the optical fiber during its useful life.Type: GrantFiled: October 14, 1986Date of Patent: April 18, 1989Assignee: Raychem Corp.Inventor: Bruce D. Campbell
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Patent number: 4815805Abstract: A mode filter for reducing a dynamic range of a write optical fiber bus which utilizes taps which initially inject optical signals into an optical fiber which have intensities skewed towards higher order modes rather than lower order modes as compared to equilibrium for the fiber functions to preferentially attenuate outermost modes rather than lowermost modes in the fiber so as to reduce a required dynamic range for an optical receiver.Type: GrantFiled: November 12, 1987Date of Patent: March 28, 1989Assignee: Raychem Corp.Inventors: Frank H. Levinson, Steve Lavelle, Thomas E. Giles, Joseph Zucker, Bruce D. Campbell
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Patent number: 4790617Abstract: Methods, apparatus and articles for systems comprising optical fibers, in particular for feeding an optical signal into an optical fiber through the buffer thereof and for withdrawing an optical signal from an optical fiber through the buffer thereof. Preferably this is achieved with the aid of an optical coupling means which contacts and conforms to the surface of the buffer at a bent portion of the fiber. The coupling means can for example be a resiliently deformable material such as a polysiloxane. In a preferred aspect, the invention provides an apparatus and method for axially aligning, and preferably joining, the ends of optical fibers. The apparatus comprises means for holding two fibers so that the fiber ends are approximately abutting and axially aligned, adjacent means for passing an optical signal into one of the fibers through the buffer thereof, and adjacent means for withdrawing that signal from the other fiber through the buffer thereof.Type: GrantFiled: March 6, 1987Date of Patent: December 13, 1988Assignee: Raychem Corp.Inventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4768854Abstract: An optical fiber distribution network includes non-destructive read taps disposed in series which create extremely small attenuations of an optical signal being tapped, and which increase the bandwidth of an optical fiber being tapped. The network further includes non-destructive write taps disposed in another series which each inject an optical signal into a second optical fiber while inducing minimal attenuation of a pre-existing optical signal in the second fiber.Type: GrantFiled: July 11, 1985Date of Patent: September 6, 1988Assignee: Raychem Corp.Inventors: Bruce D. Campbell, Joseph Zucker
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Patent number: 4747652Abstract: An optical fiber coupler for injecting light into, and withdrawing light from, an optical fiber utilizes a deformable material (8) and a clamping member (4) which clamp a buffered optical fiber (6) therebetween. Both the clamping member and deformable material are curved causing the optical fiber to be bent when so clamped resulting in light coupling between an optical fiber core and the deformable material through the fiber buffer. The deformable material is substantially transparent and has an index of refraction substantially equal to that of an outer surface of the optical fiber. A light element has a surface embedded within the deformable material, and the deformable material and coupler are specifically formed so as to reduce microbend stresses induced in the fiber when so clamped so as to increase coupling efficiency.Type: GrantFiled: May 25, 1984Date of Patent: May 31, 1988Assignee: Raychem CorporationInventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4728169Abstract: Methods, apparatus and articles for systems comprising optical fibers, in particular for feeding an optical signal into an optical fiber through the buffer thereof and for withdrawing an optical signal from an optical fiber through the buffer thereof. Preferably this is achieved with the aid of an optical coupling means which contacts and conforms to the surface of the buffer at a bent portion of the fiber. The coupling means can for example be a resiliently deformable material such as a polysiloxane. In a preferred aspect, the invention provides an apparatus and method for axially aligning , and preferably joining, the ends of optical fibers. The apparatus comprises means for holding two fibers so that the fiber ends are approximately abutting and axially aligned, adjacent means for passing an optical signal into one of the fibers through the buffer thereof, and adjacent means for withdrawing that signal from the other fiber through the buffer thereof.Type: GrantFiled: April 19, 1984Date of Patent: March 1, 1988Assignee: Raychem Corp.Inventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4679907Abstract: Methods, apparatus and articles for systems comprising optical fibers, in particular for feeding an optical signal into an optical fiber through the buffer thereof and for withdrawing an optical signal from an optical fiber through the buffer thereof. Preferably this is achieved with the aid of an optical coupling means which contacts and conforms to the surface of the buffer at a bent portion of the fiber. The coupling means can for example be a resiliently deformable material such as a polysiloxane. In a preferred aspect, the invention provides an apparatus and method for axially aligning, and preferably joining, the ends of optical fibers. The apparatus comprises means for holding two fibers so that the fiber ends are approximately abutting and axially aligned, adjacent means for passing an optical signal into one of the fibers through the buffer thereof, and adjacent means for withdrawing that signal from the other fiber through the buffer thereof.Type: GrantFiled: April 19, 1984Date of Patent: July 14, 1987Assignee: Raychem Corp.Inventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4664732Abstract: Methods, apparatus and articles for systems comprising optical fibers, in particular for feeding an optical signal into an optical fiber through the buffer thereof and for withdrawing an optical signal from an optical fiber through the buffer thereof. Preferably this is achieved with the aid of an optical coupling means which contacts and conforms to the surface of the buffer at a bent portion of the fiber. The coupling means can for example be a resiliently deformable material such as a polysiloxane. In a preferred aspect, the invention provides an apparatus and method for axially aligning, and preferably joining, the ends of optical fibers. The apparatus comprises means for holding two fibers so that the fiber ends are approximately abutting and axially aligned, adjacent means for passing an optical signal into one of the fibers through the buffer thereof, and adjacent means for withdrawing that signal from the other fiber through the buffer thereof.Type: GrantFiled: January 13, 1986Date of Patent: May 12, 1987Assignee: Raychem Corp.Inventors: Bruce D. Campbell, James T. Triplett, Richard E. Tylor
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Patent number: 4586783Abstract: A signal coupler for buffered optical fibers comprises a soft, transparent, polymeric rod against which the fiber is pressed by a rigid "key" having regularly spaced protrusions which induce periodic microbending of the fiber. An optical signal passing down the fiber may be coupled into the polymeric rod by the key pressing the fiber into the rod, and the signal extracted from the end of the rod. A similar process may be used to inject an optical signal into the fiber. The coupler may be used either as a termination for a fiber or as part of a non-destructive tap. The induced attenuation and the intensity of the extracted signal may be varied by varying the pressure on the key.Type: GrantFiled: May 23, 1983Date of Patent: May 6, 1986Assignee: Raychem CorporationInventors: Bruce D. Campbell, Robert J. Naidoff, Richard E. Tylor
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Patent number: 4557550Abstract: An optical fiber tap which is especially useful as a node in a ring topology data processing system. The tap, which does not interrupt the physical continuity of the fiber, has an open position and a closed position. In the open position, a signal passing down the optical fiber passes through the tap without alteration. In the closed position, a signal passing down the optical fiber is extracted through a first bend which is put into the fiber by the tap; the extracted signal, or an electrical counterpart thereof, is processed and a counterpart of the extracted signal, or a new signal obtained by operating on the extracted signal, e.g. in a data processor, is injected into the fiber through a second bend which is put into the fiber by the tap.Type: GrantFiled: October 27, 1982Date of Patent: December 10, 1985Assignee: Raychem CorporationInventors: Penny L. Beals, Phyllis M. Simon, Bruce D. Campbell
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Patent number: 4498732Abstract: A method and device for organizing a bight of an optical fiber and the like at a splice or slack point is provided. The method comprises wrapping the bight about a cylindrical core to form a helix or a pair of helices of opposite handedness, thereby both minimizing the diameter of a container necessary to enclose that bight and maximizing the bend radius of the fiber. The bight may be laid on a sheet for convenient wrapping, and a plurality of fibers per sheet, sheets per core, or cores per splice may be used if the number of fibers to be organized is large. A ready means of encapsulation is also provided.Type: GrantFiled: May 25, 1982Date of Patent: February 12, 1985Assignee: Raychem CorporationInventors: Bruce D. Campbell, Vernon A. Fentress
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Patent number: 4462655Abstract: An apparatus and method are described for preconnectorization of the ends of a cable for pulling through a standard diameter duct. The apparatus utilizes a connector consisting of three major parts: first and second wire organizers and a contact element means. The wire organizers are of a form factor sufficiently small and are organized such as to fit around the cable core without increasing the outside composite diameter of the cable. The apparatus further includes two forms of cable pulling devices.Type: GrantFiled: August 24, 1983Date of Patent: July 31, 1984Assignee: Raychem CorporationInventors: Bruce D. Campbell, James T. Triplett
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Patent number: 4428115Abstract: An apparatus and method are described for preconnectorization of the ends of a cable for pulling through a standard diameter duct. The apparatus utilizes a connector consisting of three major parts: first and second wire organizers and a contact element means. The wire organizers are of a form factor sufficiently small and are organized such as to fit around the cable core without increasing the outside composite diameter of the cable. The apparatus further includes two forms of cable pulling devices.Type: GrantFiled: April 27, 1981Date of Patent: January 31, 1984Assignee: Raychem CorporationInventors: Bruce D. Campbell, James T. Triplett