Patents Assigned to Lucent Technologies Incorporated
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Publication number: 20090127472Abstract: A negative refractive index device and a method of generating radiation. In one embodiment, the device includes: (1) an optical input configured to receive light and (2) an optical medium having a negative index of refraction and a second-order nonlinearity proximate a center frequency of the light, coupled to the optical input and configured to resonate in response to the light to yield radiation having a phase velocity based on a group velocity of the light.Type: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: Lucent Technologies IncorporatedInventors: Aref Chowdhury, John A. Tataronis
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Publication number: 20090003845Abstract: An automatic threshold voltage adjustment circuit, a method of automatically adjusting threshold voltage and an optical receiver for an optical communication system. In one embodiment, the circuit includes: (1) an amplitude detector configured to detect an amplitude of a received optical signal, (2) a variable resistor coupled to the amplitude detector and including a field-effect transistor configured to operate in a triad mode to provide a resistance that varies substantially linearly based on the amplitude and (3) an operational amplifier coupled to the variable resistor and configured to apply a variable gain based on the resistance to an input threshold voltage to yield an adapted threshold voltage.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Applicant: Lucent Technologies IncorporatedInventor: Noriaki Kaneda
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Publication number: 20090003838Abstract: An optical data transmission system and a method of communicating data. In one embodiment, the transmission system is part of an optical data communication system that includes: (1) an optical pulse transmitter configured to generate amplitude-modulated optical pulses at a fixed repetition rate, (2) an optical filter coupled to an output of the optical pulse transmitter, having a transmission notch at the fixed repetition rate and configured to filter the optical pulses and (3) an optical detector coupled to an output of the optical filter and configured to produce an output electrical signal representative of intensities of the optical pulses provided by the optical filter.Type: ApplicationFiled: June 27, 2007Publication date: January 1, 2009Applicant: Lucent Technologies IncorporatedInventors: Young-Kai Chen, Andreas B. Leven
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Publication number: 20070297806Abstract: An apparatus, a polarization diversity receiver and a method of receiving a received optical signal. In one embodiment, the apparatus includes: (1) an optical device configured to separate in-phase and quadrature components of a received optical signal, to transmit the in-phase components to a first optical output thereof and to transmit the quadrature components to a second optical output thereof, (2) a first polarization splitter coupled to receive light at the first optical output and (3) a second polarization splitter coupled to receive light at the second optical output.Type: ApplicationFiled: June 23, 2006Publication date: December 27, 2007Applicant: Lucent Technologies, IncorporatedInventors: Noriaki Kaneda, Andreas B. Leven
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Publication number: 20040240387Abstract: A system for, and method of, simulating traffic loads in a packetized communication network. In one embodiment, the system includes: (1) an initial arrival generator that generates an initial arrival for a simulated user session at an independent time from a previous user session arrival and (2) a subsequent arrival generator, associated with the initial arrival generator, that generates a number of connections to be associated with the simulated user session as an independent variable and, if the number of connections is greater than one, generates a mean connection interarrival time for the simulated user session and a plurality of timings of subsequent arrivals.Type: ApplicationFiled: May 28, 2003Publication date: December 2, 2004Applicant: Lucent Technologies, IncorporatedInventors: Carl J. Nuzman, Iraj Saniee, Alan A. Weiss
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Patent number: 5966491Abstract: 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.Type: GrantFiled: May 15, 1997Date of Patent: October 12, 1999Assignee: Lucent Technologies IncorporatedInventor: David John DiGiovanni
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Patent number: 5914437Abstract: Cracking in thin sheets of sol-gel-produced material is avoided by use of a support liquid during gelation and drying. Silica glass, as well as other glass and ceramic bodies, is contemplated.Type: GrantFiled: June 23, 1997Date of Patent: June 22, 1999Assignee: Lucent Technologies IncorporatedInventors: Edwin Arthur Chandross, David Wilfred Johnson, Jr., John Burnette MacChesney, Eliezer M. Rabinovich, John Thomson, Jr.
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Patent number: 5892601Abstract: Use of an aperture in the reconstructed beam in reconstruction of multiple holograms increases selectivity beyond that realizable by spatial multiplexing so as to permit differentiation of overlapping images. "Aperturization" is suitably used for differentiation in the y-direction in shift holography, depending on Bragg selection in the x-direction.Type: GrantFiled: July 3, 1997Date of Patent: April 6, 1999Assignee: Lucent Technologies IncorporatedInventors: Kevin Curtis, William Larry Wilson
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Patent number: 5887093Abstract: A module, for upgrading optical fiber systems, includes an appropriate length of Dispersion Compensating Fiber (DCF) for nulling chromatic dispersion, together with a pump, which uses Stimulated Raman Scattering for amplifying signal in the DCF, thereby compensating for power loss associated with the DCF.Type: GrantFiled: September 12, 1997Date of Patent: March 23, 1999Assignee: Lucent Technologies IncorporatedInventors: Per Bang Hansen, Gloria Regina Jacobovitz-Veselka
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Patent number: 5873923Abstract: 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.Type: GrantFiled: October 27, 1997Date of Patent: February 23, 1999Assignee: Lucent Technologies IncorporatedInventor: David John DiGiovanni
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Patent number: 5874187Abstract: A thick holographic recording medium suitable for use in multiplex holography is prepared from a solution of a bi-functional oligomer and a mono-functional monomer. Precuring, possibly at the same radiation wavelength used for recording, cross-links the oligomer, thereby creating a host for the recording monomer.Type: GrantFiled: August 15, 1996Date of Patent: February 23, 1999Assignee: Lucent Technologies IncorporatedInventors: Vicki L. Colvin, Alexander Lowe Harris, Howard Edan Katz, Marcia Lea Schilling
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Patent number: 5847862Abstract: A significant part of signal-to-noise degradation in WDM optical fiber communications, due to Raman crosstalk, is found to be deterministic in nature. Shaping of amplifier output to offset depletion of high frequency channels improves signal capacity by an order of magnitude.Type: GrantFiled: November 29, 1997Date of Patent: December 8, 1998Assignee: Lucent Technologies IncorporatedInventors: Andrew R. Chraplyvy, Fabrizio Forghieri, Robert William Tkach
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Patent number: 5831761Abstract: A high capacity optical fiber network operative with wavelength division multiplexing. Contemplated systems can utilize span distances in excess of 100 km, signal amplification within spans, and provide plural multiplexed channels operative at multiple gigabits per second.Type: GrantFiled: May 23, 1997Date of Patent: November 3, 1998Assignee: Lucent Technologies IncorporatedInventors: Andrew R. Chraplyvy, Robert William Tkach
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Patent number: D412901Type: GrantFiled: September 15, 1998Date of Patent: August 17, 1999Assignee: Lucent Technologies IncorporatedInventors: Guy Edouard Desbarats, James Hope Lamb