Inventor · disambiguated record
Robert William Tkach
Also filed as: TKACH ROBERT · TKACH ROBERT W · TKACH ROBERT WILLIAM
38 granted patents·4 pending applications·1,654 citations·filing 1989–2012
98Inventor score
Files withAT & T CORP14LIU XIANG10LUCENT TECHNOLOGIES INC9AT & T BELL LAB3AMERICAN TELEPHONE & TELEGRAPH2
Top patents by PatentIndex Score
42 records- 0199US5225922AOptical transmission system equalizerAT & T BELL LAB·Filed 1991·Granted Jul 6, 1993·275 cites·14 claims
- 0297US6445485B1Micro-machine polarization-state controllerAT & T CORP·Filed 2001·Granted Sep 3, 2002·141 cites·31 claims
- 0396US7088676B1Methods and systems for fast restoration in a mesh network of optical cross connectsAT & T CORP·Filed 2005·Granted Aug 8, 2006·55 cites·7 claims
- 0494US8204377B2System, method and apparatus for joint self phase modulation compensation for coherent optical polarization-division-multiplexed orthogonal-frequency division-multiplexing systemsLIU XIANG·Filed 2008·Granted Jun 19, 2012·22 cites·20 claims
- 0594US6498673B1Micro-machined tunable delay lineAT & T CORP·Filed 2001·Granted Dec 24, 2002·72 cites·14 claims
- 0690US8879922B2System, method and apparatus for high-sensitivity optical detectionLIU XIANG·Filed 2011·Granted Nov 4, 2014·11 cites·23 claims
- 0790US5907420ASystem and method for mitigating cross-saturation in optically amplified networksLUCENT TECHNOLOGIES INC·Filed 1996·Granted May 25, 1999·103 cites·25 claims
- 0887US5559920ADispersion compensation in optical fiber communicationsLUCENT TECHNOLOGIES INC·Filed 1995·Granted Sep 24, 1996·97 cites·9 claims
- 0987US5420868ASuppression of brillouin scattering in lightwave transmission systemAT & T CORP·Filed 1994·Granted May 30, 1995·81 cites·16 claims
- 1085US5546210AMulti-channel optical fiber communication systemAT & T CORP·Filed 1995·Granted Aug 13, 1996·73 cites·19 claims
- 1185US5327516AOptical fiber for wavelength division multiplexingAT & T BELL LAB·Filed 1993·Granted Jul 5, 1994·65 cites·11 claims
- 1285US4908833ADistributed feedback laser for frequency modulated communication systemsAMERICAN TELEPHONE & TELEGRAPH·Filed 1989·Granted Mar 13, 1990·33 cites·4 claims
- 1384US7526198B1Methods of restoration in an ultra-long haul optical networkAT & T CORP·Filed 2005·Granted Apr 28, 2009·8 cites·6 claims
- 1484US6191877B1WDM optical fiber system using Raman amplificationLUCENT TECHNOLOGIES INC·Filed 1996·Granted Feb 20, 2001·81 cites·10 claims
- 1584US5900968AMethod of fast gain control in WDM optical networksLUCENT TECHNOLOGIES INC·Filed 1996·Granted May 4, 1999·69 cites·6 claims
- 1684US5878177ALayered switch architectures for high-capacity optical transport networksAT & T CORP·Filed 1997·Granted Mar 2, 1999·95 cites·23 claims
- 1783US8744275B2System, method, and apparatus for high-sensitivity optical detectionLIU XIANG·Filed 2011·Granted Jun 3, 2014·6 cites·20 claims
- 1883US8594515B2Digital phase conjugation for fiber-optic linksLIU XIANG·Filed 2011·Granted Nov 26, 2013·7 cites·20 claims
- 1983US4905253ADistributed Bragg reflector laser for frequency modulated communication systemsAMERICAN TELEPHONE & TELEGRAPH·Filed 1989·Granted Feb 27, 1990·30 cites·4 claims
- 2081US8682181B2System, method, and apparatus for high-sensitivity optical detectionLIU XIANG·Filed 2011·Granted Mar 25, 2014·6 cites·20 claims
- 2181US6928244B1System and method of wavelength add/drop multiplexing having client configurabilityAT & T CORP·Filed 2000·Granted Aug 9, 2005·15 cites·10 claims
- 2280US9300400B2Communication through multiplexed one-dimensional optical signalsLIU XIANG·Filed 2012·Granted Mar 29, 2016·5 cites·23 claims
- 2379US8180227B2Digital coherent detection of multi-carrier optical signalLIU XIANG·Filed 2009·Granted May 15, 2012·7 cites·20 claims
- 2478US8934786B2Communication through pre-dispersion-compensated phase-conjugated optical variantsLIU XIANG·Filed 2012·Granted Jan 13, 2015·4 cites·31 claims
- 2578US5847862AMulti-channel optical fiber communication systemLUCENT TECHNOLOGIES INC·Filed 1997·Granted Dec 8, 1998·57 cites·12 claims
- 2676US7805075B2Methods of restoration in an ultra-long haul optical networkAT & T IP II LP·Filed 2009·Granted Sep 28, 2010·4 cites·10 claims
- 2775US6292600B1Angular-precision enhancement in free-space micromachined optical switchesAT & T CORP·Filed 1999·Granted Sep 18, 2001·34 cites·17 claims
- 2875US5587830AHigh capacity optical fiber networkLUCENT TECHNOLOGIES INC·Filed 1993·Granted Dec 24, 1996·37 cites·10 claims
- 2975US5027435AOptical communication systems using Fabry-Perot cavitiesAT & T BELL LAB·Filed 1989·Granted Jun 25, 1991·41 cites·9 claims
- 3074US6970417B1Methods and systems for fast restoration in a mesh network of optical cross connectsAT & T CORP·Filed 1999·Granted Nov 29, 2005·38 cites·41 claims
- 3174US6606428B2Angular-precision enhancement in free-space micromachined optical switchesAT & T CORP·Filed 2001·Granted Aug 12, 2003·13 cites·16 claims
- 3267US5719696AHigh capacity optical fiber networkLUCENT TECHNOLOGIES INC·Filed 1996·Granted Feb 17, 1998·27 cites·3 claims
- 3363US7231147B1System and method of wavelength add/drop multiplexing having client configurabilityAT & T CORP·Filed 2005·Granted Jun 12, 2007·2 cites·3 claims
- 3459US6011892AOptical fiber for wavelength division multiplexingLUCENT TECHNOLOGIES INC·Filed 1998·Granted Jan 4, 2000·17 cites·2 claims
- 3559US2013070786A1Communication Through Phase-Conjugated Optical VariantsLIU XIANG·Filed 2012·Application pending·0 cites
- 3653US6317532B1Method and apparatus for low loss via geometrical optimization in free-space micro-machined optical switchesAT & T CORP·Filed 1999·Granted Nov 13, 2001·16 cites·16 claims
- 3741US8483575B2Apparatus and method for generating frequency-locked optical comb sourcesLIU XIANG·Filed 2010·Granted Jul 9, 2013·0 cites·21 claims
- 3839US5831761AHigh capacity optical fiber networkLUCENT TECHNOLOGIES INC·Filed 1997·Granted Nov 3, 1998·6 cites·10 claims
- 3938US2012189303A1Optical transport multiplexing client traffic onto parallel line system pathsWINZER PETER J·Filed 2011·Application pending·0 cites
- 4037US2012170929A1Apparatus And Method For Monitoring An Optical Coherent NetworkXIE CHONGJIN·Filed 2011·Application pending·0 cites
- 4136US2012002283A1Method and apparatus for raman co-pumpsXIE CHONGJIN·Filed 2010·Application pending·0 cites
- 4231US6271958B1Method and apparatus for curvature-resistant micro-mirror structures to reduce light beam loss in free-space micro-machined optical switchesAT & T CORP·Filed 1999·Granted Aug 7, 2001·1 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →