Future Wei Technologies, Inc.

Raynet Corporation

Lightica, Inc.

Gregory S Maurer

Yuri A Zakharenkov

Yu Sheng Bai

Ilya M Fishman

James E Leight

Peter W Cornish

Anat Z Sneh

Richard M Murphy

Method and system thereof for transmission of several coherence division multiplexed (CDM) optical signals via one wavelength division multiplexed (WDM) transmission channel of a multichannel WDM telecommunication system to extend the network capacity to a theoretical limit. A broadband optical source generates light within the spectral range of at least one WDM transmission channel. Several CDM channels share this spectral range to transmit and detect phase modulated optical signals through optical fiber links.

Multichannel optical communication system and method utilizing wavelength and coherence division multiplexing

An optical device for serializing data signals in a plurality of parallel channels is disclosed, including: (a) a plurality of waveguides adapted to conduct light signals of a predetermined wavelength; and (b) a nonlinear optical element having a refractive index and defining an optical path thereon adapted and configured to conduct a control light pulse along the optical path, wherein a portion of each of the plurality of waveguides is adjacent to or in contact with the nonlinear optical element at a different portion along the optical path; wherein the refractive index along the optical path is substantially altered where the control pulse is located such that the relative phase of the light signals of the predetermined wavelength is altered only where the signal is substantially coincident with the control pulse. The refractive index along the optical path in the nonlinear optical element is such that the light signals of the predetermined frequency in any one of the waveguides substantially cannot propagate past the point where the waveguide is adjacent to or in contact with the nonlinear optical element when the control pulse is not adjacent the point, and can substantially freely propagate through the point when the control pulse is adjacent the point. The device further includes a single source of the control pulse, wherein the light path is adapted and configured to conduct the control pulse to all portions of the light path where the waveguides are adjacent to or in contact with the nonlinear optical element, whereby a single control pulse can alter the relative phases of all light signals substantially coincident with the control pulse propagating along the optical path.

Optical time-division multiplexing system

A linear optical broadband signal generator includes primary and secondary optical modulators whose outputs are combined so as to minimize intermodulation distortion of a modulated optical signal. A constant amplitude optical signal is split differentially so as to create primary and secondary power levels, the primary and secondary power levels being inputted into the primary and secondary modulators. An electrical input to one of the modulators is differentially attenuated so as to reduce third order modulation products when modulated outputs of the modulators are combined. In addition, the total modulated optical output power is maximized by adjustment to one of the outputs of one of the modulators so that its phase is more in line with a phase of the output of the other modulator so as to maximize first order products of the combined output.

Linear broadband signal generator using primary and secondary optical

Growing community of inventors

San Ramon, CA, United States of America

Gregory S Maurer