Robert B Feldman

US Patent:

6650840, Nov 18, 2003

Filed:

Mar 26, 1999

Appl. No.:

09/277044

Inventors:

Robert D. Feldman - Middletown NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 1008

US Classification:

398 21, 398 16, 398 10, 398168, 398169

Abstract:

A method for identifying faults in a branched optical network having a central office optically connected to a plurality of optical network units by a plurality of optical paths. The method involves transmitting an optical signal from the central office to the optical network units reflecting a portion of the transmitted optical signal back to the central office. This reflected signal is then used to determine whether a fault exists in the branched optical network.

US Patent:

6661946, Dec 9, 2003

Filed:

Jul 9, 2001

Appl. No.:

09/901290

Inventors:

Carl A Caroli - Locust NJ
Robert D. Feldman - Middletown NJ
Scott D Young - Holmdel NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 628

US Classification:

385 24, 398 93, 398 94, 398 79, 398 82, 398 34

Abstract:

Optical signal power levels for selected optical channels processed within an add/drop node in a wavelength division multiplexed (WDM) system are adjusted as a function of variations in signal power in an incoming WDM signal caused by gain ripple. In particular, a âripple fittingâ method is described whereby the optical signal power of individual optical channels being added at the add/drop node are adjusted to levels that correspond to the ripple profile of other optical channels being routed through the add/drop node. In this manner, the gain ripple in the WDM signal being output from the add/drop node approximately corresponds to the gain ripple in the incoming WDM signal at the node.

US Patent:

6798567, Sep 28, 2004

Filed:

Mar 7, 2002

Appl. No.:

10/093041

Inventors:

Robert D. Feldman - Middletown NJ
Mahan Movassaghi - Middletown NJ
David A. Sadler - Holmdel NJ
William A. Thompson - Red Bank NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01S 300

US Classification:

35934142, 398 25

Abstract:

A method and apparatus for controlling transients in an optical signal propagating along an optical fiber path interconnecting a plurality of network elements employs a power threshold to determine an appropriate response given a change in optical signal power.

US Patent:

7161734, Jan 9, 2007

Filed:

May 26, 2004

Appl. No.:

10/853836

Inventors:

Robert D. Feldman - Middletown NJ, US
Mahan Movassaghi - Middletown NJ, US
David A. Sadler - Holmdel NJ, US
William A. Thompson - Red Bank NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01S 3/00

US Classification:

35934142, 398 25

Abstract:

A method and apparatus for controlling transients in an optical signal propagating along an optical fiber path interconnecting a plurality of network elements employs a power threshold to determine an appropriate response given a change in optical signal power.

US Patent:

7822341, Oct 26, 2010

Filed:

Sep 28, 2006

Appl. No.:

11/536238

Inventors:

Robert D. Feldman - Middletown NJ, US
Daniel C. Kilper - Rumson NJ, US
Thomas A. Skrobala - Basking Ridge NJ, US
Christopher A. White - Neshanic Station NJ, US
Lili Yu - Edison NJ, US

Assignee:

Alcatel-Lucent USA Inc. - Murray Hill NJ

International Classification:

H04B 10/08

US Classification:

398 38, 398 83, 398 33, 398177, 398181, 398160

Abstract:

In one embodiment, a control method, according to which a cascade of control messages is propagated between nodes of an optically transparent network, with each message being sent from a node to an adjacent downstream node to inform the latter about a control operation scheduled to be performed at the message-sending node and/or an upstream node that impacts an optical communication signal received at that downstream node. The cascade of control messages effectively creates an ad hoc control domain, in which control operations performed at various nodes of that domain can be coordinated to reduce unfavorable interactions between those control operations. By repeatedly propagating appropriate cascades of control messages through the network, control domains can be changed dynamically and adaptively to reflect any changes to the network topology, equipment, and/or traffic distribution.

US Patent:

20030002104, Jan 2, 2003

Filed:

Jun 29, 2001

Appl. No.:

09/896248

Inventors:

Carl Caroli - Locust NJ, US
Christopher Doerr - Middletown NJ, US
Robert Feldman - Middletown NJ, US

International Classification:

H04J014/02

US Classification:

359/127000, 359/124000

Abstract:

A WDM input signal received at an add/drop node is coupled onto both a “drop” transmission path and a “through” transmission path within the node. Optical channels to be dropped are then processed within the “drop” path, such as by optical demultiplexing. Because a copy of the same WDM input signal is routed on the “through” path, a dynamically configurable and programmable wavelength blocker selectively blocks the optical channels that are being dropped from the WDM input signal and passes through those optical channels not being dropped onto the “through” path. In an “add” path within the node, optical channels are selectively added, such as by using optical multiplexing. Those optical channels from the multiplexed optical signal that are not designated for “add” (e.g., “unused” channels) are selectively blocked within the “add” transmission path. Optical channels from the “add” and “through” paths are then combined form a WDM output signal.

US Patent:

20040208519, Oct 21, 2004

Filed:

Mar 7, 2002

Appl. No.:

10/092746

Inventors:

Robert Feldman - Middletown NJ, US
Janet Greenberg - Freehold NJ, US
Mile Radovanovic - Morganville NJ, US
S. Thangavelu - Dayton NJ, US
William Thompson - Red Bank NJ, US

Assignee:

LUCENT TECHNOLOGIES INC.

International Classification:

H04B010/08
H04B010/00

US Classification:

398/030000

Abstract:

A method and apparatus for controlling the power level of an optical signal includes detecting the loss of a supervisory signal counter-propagating in an optical fiber.

US Patent:

56615850, Aug 26, 1997

Filed:

Feb 27, 1995

Appl. No.:

8/387306

Inventors:

Robert D. Feldman - Middletown NJ
Kang-Yih Liou - Holmdel NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 1004
H04B 1000
H04J 1408

US Classification:

359180

Abstract:

A lightwave communication system includes an optical distribution system for routing optical signals and a plurality of optical transmitters coupled to the optical distribution system. At least one of the optical transmitters has an amplified light emitting diode for generating an optical spectrum. At least one optical receiver is optically coupled to the optical distribution system.