Inventor
TKACH ROBERT WILLIAM
US25 patents
⚠️ This page may combine multiple inventors who share the name “TKACH ROBERT WILLIAM”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T CORP
11 patentsUS6445485B1Sep 3, 2002
Micro-machine polarization-state controller
AT & T CORP141 citations97
US6498673B1Dec 24, 2002
Micro-machined tunable delay line
AT & T CORP72 citations96
US7088676B1Aug 8, 2006
Methods and systems for fast restoration in a mesh network of optical cross connects
AT & T CORP55 citations94
US5878177AMar 2, 1999
Layered switch architectures for high-capacity optical transport networks
AT & T CORP95 citations94
US6292600B1Sep 18, 2001
Angular-precision enhancement in free-space micromachined optical switches
AT & T CORP34 citations92
US6970417B1Nov 29, 2005
Methods and systems for fast restoration in a mesh network of optical cross connects
AT & T CORP38 citations90
US6606428B2Aug 12, 2003
Angular-precision enhancement in free-space micromachined optical switches
AT & T CORP13 citations84
US6317532B1Nov 13, 2001
Method and apparatus for low loss via geometrical optimization in free-space micro-machined optical switches
AT & T CORP16 citations84
US6928244B1Aug 9, 2005
System and method of wavelength add/drop multiplexing having client configurability
AT & T CORP15 citations83
US7231147B1Jun 12, 2007
System and method of wavelength add/drop multiplexing having client configurability
AT & T CORP2 citations62
US6271958B1Aug 7, 2001
Method and apparatus for curvature-resistant micro-mirror structures to reduce light beam loss in free-space micro-machined optical switches
AT & T CORP1 citations52
LUCENT TECHNOLOGIES INC
7 patentsUS6191877B1Feb 20, 2001
WDM optical fiber system using Raman amplification
LUCENT TECHNOLOGIES INC81 citations96
US5907420AMay 25, 1999
System and method for mitigating cross-saturation in optically amplified networks
LUCENT TECHNOLOGIES INC103 citations96
US5900968AMay 4, 1999
Method of fast gain control in WDM optical networks
LUCENT TECHNOLOGIES INC69 citations96
US5847862ADec 8, 1998
Multi-channel optical fiber communication system
LUCENT TECHNOLOGIES INC57 citations96
US6011892AJan 4, 2000
Optical fiber for wavelength division multiplexing
LUCENT TECHNOLOGIES INC17 citations92
US5719696AFeb 17, 1998
High capacity optical fiber network
LUCENT TECHNOLOGIES INC27 citations92
US5831761ANov 3, 1998
High capacity optical fiber network
LUCENT TECHNOLOGIES INC6 citations74
LIU XIANG
7 patentsUS8204377B2Jun 19, 2012
System, method and apparatus for joint self phase modulation compensation for coherent optical polarization-division-multiplexed orthogonal-frequency division-multiplexing systems
LIU XIANG22 citations92
US8879922B2Nov 4, 2014
System, method and apparatus for high-sensitivity optical detection
LIU XIANG11 citations84
US8180227B2May 15, 2012
Digital coherent detection of multi-carrier optical signal
LIU XIANG7 citations84
US8934786B2Jan 13, 2015
Communication through pre-dispersion-compensated phase-conjugated optical variants
LIU XIANG4 citations73
US8744275B2Jun 3, 2014
System, method, and apparatus for high-sensitivity optical detection
LIU XIANG6 citations73
US8682181B2Mar 25, 2014
System, method, and apparatus for high-sensitivity optical detection
LIU XIANG6 citations73
US8483575B2Jul 9, 2013
Apparatus and method for generating frequency-locked optical comb sources
LIU XIANG0 citations41