Inventor
LIU JIAN-YU
US45 patents
⚠️ This page may combine multiple inventors who share the name “LIU JIAN-YU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CHORUM TECHNOLOGIES INC
17 patentsUS5867291AFeb 2, 1999
Programmable wavelength router
CHORUM TECHNOLOGIES INC136 citations99
US5963291AOct 5, 1999
Optical attenuator using polarization modulation and a feedback controller
CHORUM TECHNOLOGIES INC123 citations98
US5912748AJun 15, 1999
Switchable wavelength router
CHORUM TECHNOLOGIES INC116 citations98
US6208442B1Mar 27, 2001
Programmable optical multiplexer
CHORUM TECHNOLOGIES INC64 citations96
US6175432B1Jan 16, 2001
Multi-wavelength cross-connect optical network
CHORUM TECHNOLOGIES INC68 citations96
US6166838ADec 26, 2000
Optical add/drop wavelength switch
CHORUM TECHNOLOGIES INC83 citations96
US6163393ADec 19, 2000
Method and apparatus for wavelength multipexing/demultiplexing
CHORUM TECHNOLOGIES INC51 citations96
US6097518AAug 1, 2000
N x M optical wavelength routing switch
CHORUM TECHNOLOGIES INC58 citations96
US5978116ANov 2, 1999
Programmable wavelength router
CHORUM TECHNOLOGIES INC64 citations96
US6208444B1Mar 27, 2001
Apparatus for wavelength demultiplexing using a multi-cavity etalon
CHORUM TECHNOLOGIES INC92 citations95
US6337934B1Jan 8, 2002
NxN switch array with polarization displacer
CHORUM TECHNOLOGIES INC23 citations93
US6137606AOct 24, 2000
Optical wavelength router
CHORUM TECHNOLOGIES INC26 citations93
US6134358AOct 17, 2000
N x N switch array with reduced components
CHORUM TECHNOLOGIES INC37 citations93
US6115155ASep 5, 2000
System for dealing with faults in an optical link
CHORUM TECHNOLOGIES INC28 citations93
US6353467B1Mar 5, 2002
Acute twist nematic (ATN) liquid crystal device for optical communication applications
CHORUM TECHNOLOGIES INC18 citations92
US6201593B1Mar 13, 2001
Optical communication system having a liquid crystal routing switch
CHORUM TECHNOLOGIES INC31 citations92
US6141076AOct 31, 2000
Spatial light modulators constructed from ferroelectric liquid crystal devices with twisted structure
CHORUM TECHNOLOGIES INC36 citations90
CHORUM TECHNOLOGIES LP
16 patentsUS6519060B1Feb 11, 2003
Synchronous optical network in frequency domain
CHORUM TECHNOLOGIES LP84 citations98
US6600582B1Jul 29, 2003
Optical add/drop wavelength switch
CHORUM TECHNOLOGIES LP29 citations93
US6545783B1Apr 8, 2003
Optical wavelength add/drop multiplexer
CHORUM TECHNOLOGIES LP33 citations93
US6512615B2Jan 28, 2003
Method and apparatus for wavelength multiplexing/demultiplexing
CHORUM TECHNOLOGIES LP23 citations93
US6552833B2Apr 22, 2003
Programmable optical add/drop multiplexer
CHORUM TECHNOLOGIES LP31 citations92
US6519022B1Feb 11, 2003
Optical routing switch using symmetric liquid crystal cells
CHORUM TECHNOLOGIES LP32 citations92
US6429962B1Aug 6, 2002
Dynamic gain equalizer for optical amplifiers
CHORUM TECHNOLOGIES LP39 citations92
US6426816B1Jul 30, 2002
Wide transmission optical comb filter with wide pass band and wide stop band
CHORUM TECHNOLOGIES LP31 citations92
US6285478B1Sep 4, 2001
Programmable optical add/drop device
CHORUM TECHNOLOGIES LP33 citations92
US6275312B1Aug 14, 2001
Optical routing switch
CHORUM TECHNOLOGIES LP31 citations89
US6288807B1Sep 11, 2001
Optical wavelength router
CHORUM TECHNOLOGIES LP14 citations82
US6545779B1Apr 8, 2003
System for dealing with faults in an optical link
CHORUM TECHNOLOGIES LP9 citations74
US6452702B1Sep 17, 2002
N×M digitally programmable optical routing switch
CHORUM TECHNOLOGIES LP9 citations74
US6396609B1May 28, 2002
Dispersion compensation for optical systems
CHORUM TECHNOLOGIES LP11 citations73
US6515786B1Feb 4, 2003
Bandwidth variable wavelength router and method of operation
CHORUM TECHNOLOGIES LP8 citations72
US6510004B1Jan 21, 2003
Temperature insensitive polarization filter
CHORUM TECHNOLOGIES LP6 citations63