Yu Sheng Bai

US Patent:

6607311, Aug 19, 2003

Filed:

Mar 16, 2000

Appl. No.:

09/527040

Inventors:

Ilya M. Fishman - Palo Alto CA
Yu Sheng Bai - Redwood City CA
Anat Z. Sneh - Mountain View CA

Assignee:

Optimight Communications, Inc. - Mountain View CA

International Classification:

H04J 1402

US Classification:

398 79, 398 81, 398 50, 398142, 398144, 398 83

Abstract:

A transmission of optical signals generated by multi-line optical sources is provided via multichannel WDM optical network. Each multi-line optical source generates optical spectral lines within designated spectral range associated with the spectral window allocated for corresponding WDM channel, and comprises a plurality of spectral lines. Spectral lines are substantially narrower than the spectral separation between the lines.

US Patent:

6735395, May 11, 2004

Filed:

Sep 29, 2000

Appl. No.:

09/675731

Inventors:

Yu Sheng Bai - Redwood City CA

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04J 1402

US Classification:

398 95, 398 94, 398196, 398197, 372 32, 372 31

Abstract:

A multichannel WDM transmission system incorporates a plurality of WDM optical sources with stabilized wavelengths and light intensity. Efficient stabilization of these characteristics is achieved by modulation of WDM sources by distinguishing low frequency electrical signals in a range between 1 and 4 kHz and modulation depth in a range between 1% and 5% that are used as WDM source identifiers. After the modulated outputs of the WDM sources are multiplexed and filtered, a Fourier transform of total light intensity may be obtained. Digital feedbacks provide stabilization of both the wavelength and light intensity of each WDM optical source.

US Patent:

6856770, Feb 15, 2005

Filed:

Mar 8, 2001

Appl. No.:

09/802222

Inventors:

Yu Sheng Bai - Redwood City CA, US

Assignee:

Futurewei Technologies, Inc. - Plano TX

International Classification:

H04B010/00

US Classification:

398148, 398 81, 398 91, 398147, 398154, 398160, 398183, 398186, 398188, 398199, 398189

Abstract:

A system and method for transmitting data modulated spectrally enriched optical pulses with a frequency chirp via an error free propagation region of an optical fiber, in which spectrum of optical pulses gradually depletes from the spectrum that is substantially wider than the spectrum of Fourier-transform limit at an input of the error-free propagation region and becomes comparable to the Fourier-transform limit at an output of this region. The gradual depletion of the spectrum is achieved by utilizing a frequency chirp converter having a dispersion sign opposite to a dispersion sign of the optical fiber.

US Patent:

6876818, Apr 5, 2005

Filed:

Aug 18, 2000

Appl. No.:

09/642033

Inventors:

Yu Sheng Bai - Redwood City CA, US
Clarence Kan - Cupertino CA, US
Dzhakhangir V. Khaydarov - Campbell CA, US
Robert Brogle - Mountain View CA, US
Tatiana V. Rossin - Mountain View CA, US
Ilya M. Fishman - Palo Alto CA, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04B010/00

US Classification:

398154, 398146, 398148, 398183, 398186, 398185, 398189, 398 81, 398199, 398 91

Abstract:

A system and method for transmission of data modulated spectrally enriched optical pulses via an error free propagation region of an optical fiber, in which the optical pulses generated by an optical transmitter have a spectrum that is substantially wider than the spectrum of Fourier-transform limit at an input of the error-free propagation region. The spectral width of the optical pulses gradually narrows while transmitting along this region and becomes comparable to the Fourier-transform limit at an output of this region. Linear and non-linear distortions are compensated within the error free propagation region respectively by deployment of dispersion compensating units and phase modulation of transmitted optical pulses for providing them with an appropriate frequency chirp having shape comparable with a frequency chirp induced by a self-phase modulation of the optical fiber but having opposite sign.

US Patent:

7061657, Jun 13, 2006

Filed:

Oct 12, 1999

Appl. No.:

09/416081

Inventors:

Ilya M. Fishman - Palo Alto CA, US
Yu Sheng Bai - Redwood City CA, US
Anat Z. Sneh - Mountain View CA, US
Yuri A. Zakharenkov - Santa Clara CA, US
Gregory S. Maurer - San Ramon CA, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04J 14/02
H04J 14/08
H04B 10/00
H04B 10/04

US Classification:

359124, 359127, 359154, 359136, 359183

Abstract:

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.

US Patent:

7274872, Sep 25, 2007

Filed:

Mar 12, 2004

Appl. No.:

10/800371

Inventors:

Yu Sheng Bai - Los Altos Hills CA, US

Assignee:

FutureWei Technologies, Inc. - Plano TX

International Classification:

H04B 17/00

US Classification:

398 30, 398 31, 398 32, 398 33, 398 34, 398 25

Abstract:

An apparatus and method for processing a supervisory signal for optical network applications. The apparatus includes a subcarrier transmission system configured to receive a first supervisory signal and output a second supervisory signal, and an electrical-to-optical conversion system configured to receive the second supervisory signal and a first data signal and output a first optical signal. Additionally, the apparatus includes an optical-to-electrical conversion system configured to receive the first optical signal and output a first electrical signal and a second data signal, and a subcarrier reception system configured to receive the first electrical signal and output a third supervisory signal. The second supervisory signal is associated with a first subcarrier frequency. The first data signal is associated with a first data bandwidth, and the first data bandwidth includes a first data frequency.

US Patent:

7421199, Sep 2, 2008

Filed:

Aug 3, 2007

Appl. No.:

11/833956

Inventors:

Yu Sheng Bai - Los Altos Hills CA, US

International Classification:

H04B 17/00

US Classification:

398 30, 398 31, 398 32, 398 33, 398 34, 398 25

Abstract:

An apparatus and method for processing a supervisory signal for optical network applications. The apparatus includes a subcarrier transmission system configured to receive a first supervisory signal and output a second supervisory signal, and an electrical-to-optical conversion system configured to receive the second supervisory signal and a first data signal and output a first optical signal. Additionally, the apparatus includes an optical-to-electrical conversion system configured to receive the first optical signal and output a first electrical signal and a second data signal, and a subcarrier reception system configured to receive the first electrical signal and output a third supervisory signal. The second supervisory signal is associated with a first subcarrier frequency. The first data signal is associated with a first data bandwidth, and the first data bandwidth includes a first data frequency.

US Patent:

7444081, Oct 28, 2008

Filed:

Sep 17, 2004

Appl. No.:

10/944327

Inventors:

Samuel Xing Liu - San Jose CA, US
Yu Sheng Bai - Los Altos Hills CA, US

Assignee:

Futurewei Technologies, Inc. - Plano TX

International Classification:

H04B 10/00

US Classification:

398138, 398183, 398201

Abstract:

A method and system is disclosed to optically transport data at a data rate of about 5 Gbps without chromatic dispersion compensation. After receiving a first data stream at a data rate of about 2. 5 Gbps and a second data stream at a data rate of about 2. 5 Gbps, the first and second data streams are combined into a third data stream at a data rate of about 5 Gbps by interleaving the first data stream and the second data stream, wherein the third data stream is modulated for optically transporting the same from a transmission end.