Sethumadhavan Chandrasekhar

Person

Matawan, NJ, US

People

Patents Grantslast 30 patents

Information Patent Grant
Optical transport system employing direct-detection self-coherent r...
- Patent number 10,404,400
- Issue date Sep 3, 2019
- Nokia of America Corporation
- Xi Chen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Feedback for electronic pre-distortion in an optical transmitter
- Patent number 9,419,722
- Issue date Aug 16, 2016
- Alcatel Lucent
- Peter J. Winzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for space-division multiplexing systems
- Patent number 9,344,779
- Issue date May 17, 2016
- Alcatel Lucent
- Chandrasekhar Sethumadhavan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication through multiplexed one-dimensional optical signals
- Patent number 9,300,400
- Issue date Mar 29, 2016
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Detection and removal of cycle slip from received signals
- Patent number 9,264,146
- Issue date Feb 16, 2016
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frequency-dependent I/Q-signal imbalance correction coherent optica...
- Patent number 9,203,682
- Issue date Dec 1, 2015
- Alcatel Lucent
- Peter J. Winzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dispersion management for inhomogeneous fiber-optic links
- Patent number 9,160,456
- Issue date Oct 13, 2015
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for transmitting high-level QAM optical signal...
- Patent number 8,953,949
- Issue date Feb 10, 2015
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frequency equalization for an optical transmitter
- Patent number 8,923,706
- Issue date Dec 30, 2014
- Alcatel Lucent
- Chandrasekhar Sethumadhavan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for generating interleaved return-to-zero (IRZ...
- Patent number 8,842,997
- Issue date Sep 23, 2014
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pilot-assisted data transmission in a coherent optical-communicatio...
- Patent number 8,660,433
- Issue date Feb 25, 2014
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System, apparatus and method for communicating data via polarizatio...
- Patent number 8,611,751
- Issue date Dec 17, 2013
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital phase conjugation for fiber-optic links
- Patent number 8,594,515
- Issue date Nov 26, 2013
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Coherent optical receiver for pilot-assisted data transmission
- Patent number 8,515,286
- Issue date Aug 20, 2013
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for generating frequency-locked optical comb s...
- Patent number 8,483,575
- Issue date Jul 9, 2013
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital coherent detection of multi-carrier optical signal
- Patent number 8,180,227
- Issue date May 15, 2012
- Alcatel Lucent
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for receiving high spectral efficiency optical DP...
- Patent number 8,121,494
- Issue date Feb 21, 2012
- Alcatel Lucent
- Chraplyvy R Andrew
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Duobinary modulation with a lumped-element Mach-Zehnder device
- Patent number 7,782,520
- Issue date Aug 24, 2010
- Alcatel-Lucent USA Inc.
- Andrew Adamiecki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiver apparatus and method
- Patent number 7,477,852
- Issue date Jan 13, 2009
- Alcatel-Lucent USA Inc.
- Anjali Agarwal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Tunable duobinary transmitter
- Patent number 7,333,553
- Issue date Feb 19, 2008
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical equalizer for intersymbol interference mitigation
- Patent number 7,308,169
- Issue date Dec 11, 2007
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Variable-bandwidth multi-granularity optical add/drop network
- Patent number 6,996,307
- Issue date Feb 7, 2006
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-channel optical equalizer for intersymbol interference mitiga...
- Patent number 6,804,434
- Issue date Oct 12, 2004
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-channel optical equalizer for intersymbol interference mitiga...
- Patent number 6,785,446
- Issue date Aug 31, 2004
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photo detector assembly
- Patent number 6,498,873
- Issue date Dec 24, 2002
- Agere Systems Inc.
- Sethumadhavan Chandrasekhar
- G02 - OPTICS
Information Patent Grant
Wavelength selective polarization beam splitter/combiner
- Patent number 6,400,860
- Issue date Jun 4, 2002
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- G02 - OPTICS
Information Patent Grant
Single-chip wavelength converter
- Patent number 6,294,821
- Issue date Sep 25, 2001
- Agere Systems Optoelectronics
- Sethumadhavan Chandrasekhar
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Direct detection receiver
- Patent number 6,262,411
- Issue date Jul 17, 2001
- Agere Systems Optoelectronics Guardian Corp.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL TRANSPORT SYSTEM EMPLOYING DIRECT-DETECTION SELF-COHERENT R...
- Publication number 20180294913
- Publication date Oct 11, 2018
- Alcatel-Lucent USA Inc.
- Xi Chen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FEEDBACK FOR ELECTRONIC PRE-DISTORTION IN AN OPTICAL TRANSMITTER
- Publication number 20160065311
- Publication date Mar 3, 2016
- Alcatel-Lucent USA Inc.
- Peter J. Winzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DETECTION AND REMOVAL OF CYCLE SLIP FROM RECEIVED SIGNALS
- Publication number 20150215050
- Publication date Jul 30, 2015
- ALCATEL LUCENT
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DISPERSION MANAGEMENT FOR INHOMOGENEOUS FIBER-OPTIC LINKS
- Publication number 20150086218
- Publication date Mar 26, 2015
- Alcatel-Lucent USA Inc.
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FIBER-NONLINEARITY PRE-COMPENSATION PROCESSING FOR AN OPTICAL TRANS...
- Publication number 20150086193
- Publication date Mar 26, 2015
- Alcatel-Lucent USA Inc.
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FREQUENCY EQUALIZATION FOR AN OPTICAL TRANSMITTER
- Publication number 20140029957
- Publication date Jan 30, 2014
- Alcatel-Lucent USA Inc.
- Chandrasekhar Sethumadhavan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method And Apparatus For Space-Division Multiplexing Systems
- Publication number 20130236175
- Publication date Sep 12, 2013
- Chandrasekhar Sethumadhavan
- G02 - OPTICS
Information Patent Application
METHOD AND APPARATUS FOR TRANSMITTING HIGH-LEVEL QAM OPTICAL SIGNAL...
- Publication number 20130170841
- Publication date Jul 4, 2013
- ALCATEL-LUCENT USA
- Xiang LIU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION THROUGH MULTIPLEXED ONE-DIMENSIONAL OPTICAL SIGNALS
- Publication number 20130136449
- Publication date May 30, 2013
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DIGITAL PHASE CONJUGATION FOR FIBER-OPTIC LINKS
- Publication number 20120224855
- Publication date Sep 6, 2012
- Alcatel-Lucent USA Inc.
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Apparatus And Method For Generating Interleaved Return-To-Zero (IRZ...
- Publication number 20120177372
- Publication date Jul 12, 2012
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PILOT-ASSISTED DATA TRANSMISSION IN A COHERENT OPTICAL-COMMUNICATIO...
- Publication number 20120148255
- Publication date Jun 14, 2012
- Alcatel-Lucent USA Inc.
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COHERENT OPTICAL RECEIVER FOR PILOT-ASSISTED DATA TRANSMISSION
- Publication number 20120148264
- Publication date Jun 14, 2012
- Alcatel-Lucent USA Inc.
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FREQUENCY-DEPENDENT I/Q-SIGNAL IMBALANCE CORRECTION FOR COHERENT OP...
- Publication number 20120057863
- Publication date Mar 8, 2012
- Alcatel-Lucent USA Inc.
- Peter J. Winzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND APPARATUS FOR RAMAN CO-PUMPS
- Publication number 20120002283
- Publication date Jan 5, 2012
- Chongjin Xie
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Apparatus and Method For Generating Frequency-Locked Optical Comb S...
- Publication number 20110170873
- Publication date Jul 14, 2011
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Digital Coherent Detection of Multi-Carrier Optical Signal
- Publication number 20110069975
- Publication date Mar 24, 2011
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SYSTEM, APPARATUS AND METHOD FOR COMMUNICATING DATA VIA POLARIZATIO...
- Publication number 20100215374
- Publication date Aug 26, 2010
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SYSTEM AND METHOD FOR RECEIVING HIGH SPECTRAL EFFICIENCY OPTICAL DP...
- Publication number 20100046948
- Publication date Feb 25, 2010
- Andrew Roman Chraplyvy
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Polarization-Multiplexed Multilevel Differential Phase Shift Keyed...
- Publication number 20090086215
- Publication date Apr 2, 2009
- Xiang Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DUOBINARY MODULATION WITH A LUMPED-ELEMENT MACH-ZEHNDER DEVICE
- Publication number 20080158643
- Publication date Jul 3, 2008
- Lucent Technologies Inc.
- Andrew Adamiecki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical receiver apparatus and method
- Publication number 20060171720
- Publication date Aug 3, 2006
- Anjali Agarwal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Equalizer having tunable optical and electronic dispersion compensa...
- Publication number 20060067699
- Publication date Mar 30, 2006
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Tunable duobinary transmitter
- Publication number 20050265474
- Publication date Dec 1, 2005
- Lucent Technologies Inc.
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical equalizer for intersymbol interference mitigation
- Publication number 20050058459
- Publication date Mar 17, 2005
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Variable-bandwidth multi-granularity optical add/drop network
- Publication number 20050053325
- Publication date Mar 10, 2005
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MULTI-CHANNEL OPTICAL EQUALIZER FOR INTERSYMBOL INTERFERENCE MITIGA...
- Publication number 20040184723
- Publication date Sep 23, 2004
- Sethumadhavan Chandrasekhar
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Photodetector having a waveguide and resonant coupler and a method...
- Publication number 20020197016
- Publication date Dec 26, 2002
- Sethumadhavan Chandrasekhar
- G02 - OPTICS

Sethumadhavan Chandrasekhar

Person

Patents Grantslast 30 patents

Optical transport system employing direct-detection self-coherent r...

Feedback for electronic pre-distortion in an optical transmitter

Method and apparatus for space-division multiplexing systems

Communication through multiplexed one-dimensional optical signals

Detection and removal of cycle slip from received signals

Frequency-dependent I/Q-signal imbalance correction coherent optica...

Dispersion management for inhomogeneous fiber-optic links

Method and apparatus for transmitting high-level QAM optical signal...

Frequency equalization for an optical transmitter

Apparatus and method for generating interleaved return-to-zero (IRZ...

Pilot-assisted data transmission in a coherent optical-communicatio...

System, apparatus and method for communicating data via polarizatio...

Digital phase conjugation for fiber-optic links

Coherent optical receiver for pilot-assisted data transmission

Apparatus and method for generating frequency-locked optical comb s...

Digital coherent detection of multi-carrier optical signal

System and method for receiving high spectral efficiency optical DP...

Duobinary modulation with a lumped-element Mach-Zehnder device

Optical receiver apparatus and method

Tunable duobinary transmitter

Optical equalizer for intersymbol interference mitigation

Variable-bandwidth multi-granularity optical add/drop network

Multi-channel optical equalizer for intersymbol interference mitiga...

Multi-channel optical equalizer for intersymbol interference mitiga...

Photo detector assembly

Wavelength selective polarization beam splitter/combiner

Single-chip wavelength converter

Direct detection receiver

Patents Applicationslast 30 patents

OPTICAL TRANSPORT SYSTEM EMPLOYING DIRECT-DETECTION SELF-COHERENT R...

FEEDBACK FOR ELECTRONIC PRE-DISTORTION IN AN OPTICAL TRANSMITTER

DETECTION AND REMOVAL OF CYCLE SLIP FROM RECEIVED SIGNALS

DISPERSION MANAGEMENT FOR INHOMOGENEOUS FIBER-OPTIC LINKS

FIBER-NONLINEARITY PRE-COMPENSATION PROCESSING FOR AN OPTICAL TRANS...

FREQUENCY EQUALIZATION FOR AN OPTICAL TRANSMITTER

Method And Apparatus For Space-Division Multiplexing Systems

METHOD AND APPARATUS FOR TRANSMITTING HIGH-LEVEL QAM OPTICAL SIGNAL...

COMMUNICATION THROUGH MULTIPLEXED ONE-DIMENSIONAL OPTICAL SIGNALS

DIGITAL PHASE CONJUGATION FOR FIBER-OPTIC LINKS

Apparatus And Method For Generating Interleaved Return-To-Zero (IRZ...

PILOT-ASSISTED DATA TRANSMISSION IN A COHERENT OPTICAL-COMMUNICATIO...

COHERENT OPTICAL RECEIVER FOR PILOT-ASSISTED DATA TRANSMISSION

FREQUENCY-DEPENDENT I/Q-SIGNAL IMBALANCE CORRECTION FOR COHERENT OP...

METHOD AND APPARATUS FOR RAMAN CO-PUMPS

Apparatus and Method For Generating Frequency-Locked Optical Comb S...

Digital Coherent Detection of Multi-Carrier Optical Signal

SYSTEM, APPARATUS AND METHOD FOR COMMUNICATING DATA VIA POLARIZATIO...

SYSTEM AND METHOD FOR RECEIVING HIGH SPECTRAL EFFICIENCY OPTICAL DP...

Polarization-Multiplexed Multilevel Differential Phase Shift Keyed...

DUOBINARY MODULATION WITH A LUMPED-ELEMENT MACH-ZEHNDER DEVICE

Optical receiver apparatus and method

Equalizer having tunable optical and electronic dispersion compensa...

Tunable duobinary transmitter

Optical equalizer for intersymbol interference mitigation

Variable-bandwidth multi-granularity optical add/drop network

MULTI-CHANNEL OPTICAL EQUALIZER FOR INTERSYMBOL INTERFERENCE MITIGA...

Photodetector having a waveguide and resonant coupler and a method...