Linn F Mollenauer

US Patent:

6408117, Jun 18, 2002

Filed:

Apr 5, 2000

Appl. No.:

09/543267

Inventors:

Linn Frederick Mollenauer - Colts Neck NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 634

US Classification:

385 37, 385 12, 385 13, 385 15, 385 31, 385123, 3593411, 35933721

Abstract:

By urging an ordinary single-mode (usually dispersion-shifted) fiber into an external, long period mechanical grating, a highly wavelength-selective coupling between the fibers guiding mode and a cladding mode is induced. A sequence of such induced gratings, all on the same fiber, can be used to create a many tens of nm wide loss band of arbitrary shape, with resolution of 3 nm or better, whose strength at any wavelength can be continuously adjusted from zero to -17 dB or more. With its simplicity, nearly zero background loss, and especially, with its potential for continual readjustment, the device is ideal for dynamic gain equalization of optical amplifiers.

US Patent:

6532330, Mar 11, 2003

Filed:

Jun 19, 2000

Appl. No.:

09/596454

Inventors:

Linn Frederick Mollenauer - Colts Neck NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 602

US Classification:

385123, 359161

Abstract:

Techniques are described for constructing an optical fiber transmission line having a desired length and path-average dispersion, while also having a desired total In one approach, a first fiber is selected with a first dispersion and and a second fiber is selected with a second dispersion and having a sign opposite to that of the dispersion and of the first fiber. A third fiber is then selected having a third dispersion and such that when a combined transmission line having a desired total length and path-average dispersion is assembled from the first, second, and third fibers, the total of the transmission line may be adjusted by adjusting the respective lengths of the first, second, and third fibers, while maintaining the desired total length and path-average dispersion {overscore (D)} of the transmission line. The dispersion maps of the first, second, and third fibers are used to calculate the respective lengths of the three fibers needed to assemble a transmission line having the desired total length, path-average dispersion {overscore (D)}, and.

US Patent:

6611368, Aug 26, 2003

Filed:

Apr 20, 2000

Appl. No.:

09/552772

Inventors:

Andrew R Grant - Matawan NJ
Pavel Viktorovich Mamyshev - Morganville NJ
Linn Frederick Mollenauer - Colts Neck NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01S 330

US Classification:

359334, 3593413, 359123

Abstract:

A method and apparatus for producing a flat gain over very broad gain bands utilizing backward-pumped Raman amplification. The method allows for dynamic gain control through simple electronic means.

US Patent:

7062176, Jun 13, 2006

Filed:

Dec 30, 2002

Appl. No.:

10/331217

Inventors:

Xiang Liu - Marlboro NJ, US
Colin J McKinstrie - Manalapan NJ, US
Linn Frederick Mollenauer - Colts Neck NJ, US
Richart Elliott Slusher - Lebanon NJ, US
Xing Wei - New Providence NJ, US
Chunhui Xu - Ithaca NY, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 10/02
H04B 10/18
G02B 5/00
G02F 1/03
G02F 1/355
H04B 10/06
G02F 1/35
G02F 1/377

US Classification:

398159, 398208, 385 1, 385122

Abstract:

A nonlinear phase-shift compensation method and apparatus is provided for improving system performance in optical transmission systems. The apparatus includes a phase-shift compensating device that provides a partial compensating phase shift to reduce the nonlinear phase noise resulting from self-phase modulation and amplified spontaneous emissions in an optical transmission system.

US Patent:

7209669, Apr 24, 2007

Filed:

Jan 30, 2003

Appl. No.:

10/354718

Inventors:

Inuk Kang - Matawan NJ, US
Linn Frederick Mollenauer - Colts Neck NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 10/04

US Classification:

398195, 398198, 398196

Abstract:

Method and apparatus for synchronizing two different types of modulators in an optical transmission system includes a first modulator generating an optical pulse train, a second modulator encoding data onto the optical pulse train, an optical filter resolving upper and lower modulation sidebands of the optical data and an analyzer measuring the optical power of modulation sidebands and converting the received optical power of the sidebands into a control signal for synchronizing the two modulators. A wedged etalon is the filter element selecting the USB and LSB from the optical data spectrum. The analyzer contains photo-detectors measuring the optical power of the filtered USB and LSB and an electronic differential amplifier producing a control signal based upon photo-detector output. The phase shifter, in response to the control signal, adapts the temporal delay of the first modulator to reduce differences between the power levels of the upper and lower sidebands.

US Patent:

7312910, Dec 25, 2007

Filed:

Aug 23, 1999

Appl. No.:

09/378808

Inventors:

James Power Gordon - Rumson NJ, US
Pavel Viktorovich Mamyshev - Morganville NJ, US
Linn Frederick Mollenauer - Colts Neck NJ, US

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

H04B 10/12

US Classification:

359179, 359161, 359188

Abstract:

A new dispersion managed soliton transmission system where the D map period is the same as the amplifier period and the pulse breathing the in the +D sections of the D maps is approximately symmetrical. Pulse breathing symmetry by one or both of two techniques. In one technique a guiding filter is placed at the beginning of the D map period such that the guiding filter reduces the bandwidth of soliton pulses passing through it by a minimum amount. Consequently, pulse breathing symmetry is restored. The path average pulse energy vs. behavior of solitons propagating through the D map is changed such that (1) solitons of modest bandwidths have adequate energy at or near =to provide for error-free transmission over transoceanic distances at or near =0, and (2) such that the path average pulse energy is nearly independent of , at or near =0 for solitons of various pulse widths. The transmission system having this D map is much more tolerant of variations in and pulse width than the prior art. Another technique uses two different types of +D fiber in the +D section so that there is a step change in the ratio of D divided by the cross-sectional area of the fiber, or “A”, as solitons propagate from one type of +D fiber to the other type of +D fiber in the +D section.

US Patent:

7369778, May 6, 2008

Filed:

Dec 30, 2002

Appl. No.:

10/331299

Inventors:

Xiang Liu - Marlboro NJ, US
Linn Frederick Mollenauer - Colts Neck NJ, US
Xing Wei - New Providence NJ, US

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04B 10/12
H04B 10/00

US Classification:

398148, 398159

Abstract:

In one embodiment of the invention a dispersion compensator is provided for use in a dense wavelength division multiplexed optical communication system. The dispersion compensator comprises a periodic-group-delay dispersion compensation module which provides a portion of the dispersion compensation for a dispersion managed span of the optical communication system. A remaining portion of the dispersion compensation for the dispersion managed span is provided by dispersion compensating fiber. The portions of the dispersion compensation provided by each of the periodic-group-delay dispersion compensation module and the dispersion compensating fiber is selected such that the collision-induced timing jitter is reduced.

US Patent:

20030194240, Oct 16, 2003

Filed:

Nov 27, 2002

Appl. No.:

10/305855

Inventors:

Linn Mollenauer - Colts Neck NJ, US
Chunhui Xu - Ithaca NY, US

International Classification:

H04B010/00

US Classification:

398/158000, 398/155000

Abstract:

A jitter compensator apparatus is provided having a phase modulator for receiving jittered pulses and a clock recovery device for locally recovering a clock signal. The phase modulator is driven in synchronism by the the locally recovered clock signal and is adapted to provide a frequency shift to the jittered pulses proportional to the jitter displacement of each of the jittered pulses.