Lucent Technologies Inc.

Frank J Peragine

Yuan-Hua Kao

Steven R Johnson

Daniel A Fishman

Richard C Fuller

Philip Joseph Lauriello

Stan Lumish

Thomas A Halliday

Taras Igorevich Lakoba

Vibha Prakash Goel

Joseph P Kunz

Michael I Distefano

A method and apparatus for transmitting optical pulses in a dispersion-managed optical transmission system comprises determining the pulse width of optical pulses in a optical transmission channel in accordance with the path-average dispersion (PAD) experienced by that channel.

Method and apparatus for optimization of dispersion-managed return-to-zero transmission by employing optical pulses having variable widths

A method and apparatus for transmitting a modulated optical signal includes a continuous source of light, a first optical modulator for generating an optical pulse stream in response to a radio frequency (RF) driving signal and a DC bias signal, and a second modulator for modulating the optical pulse stream with an electrical data signal. A processor dithers the phase of the RF driving signal using a first dither signal and the level of the DC bias signal using a second dither signal. The processor detects the first and/or second dither signals in the modulated optical signal and adjusts the phase of the RF driving signal and/or level of the DC bias signal to null the detected first and/or second dither signal.

Method and apparatus for transmitting a modulated optical signal

Loss of signal detector for low-level optical signals

A common Modular Carrier (MC) unit shares power and control among a plurality of Optical Network Units (ONU) which are plugged into it, thereby increasing the ONU density in an existing equipment shelf. In one embodiment, the MC unit together with its four ONU units is arranged to slide into an existing card slot of the existing equipment shelf and occupy the space of the adjacent slot. The result is a doubling of the capacity over the conventional technique of using a separate slot for each ONU unit.

Modular optical network units and mounting arrangement

The invention is directed to an optical node, e.g., a so-called add/drop site, that receives an optical carrier signal formed from a plurality of component optical signals of respective wavelengths and a plurality of different identification signals which identify respective ones of the wavelengths. As is typically the case, the node includes a demultiplexer that demultiplexes the optical carrier signal and outputs the demultiplexed component optical signals to respective optical paths. Disadvantageously, each of the demultiplexed optical component signals includes all of the identification signals as a result of such demultiplexing. However, we dispose an optical translator unit in at least one of the optical paths to remove all of the identification signals from the one component optical signals and also reset the power level of that signal. A transmitter in the translator unit outputs the latter signal as an optical signal in which the wavelength of the outputted optical signal may be changed on an optional basis to a wavelength that is different from the wavelength of the one component optical signal.

Optical signal translator unit

Growing community of inventors

Fair Haven, NJ, United States of America

Frank J Peragine