Inventor
SHIGEMATSU MASAYUKI
JP40 patents
⚠️ This page may combine multiple inventors who share the name “SHIGEMATSU MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO ELECTRIC INDUSTRIES
38 patentsUS6259554B1Jul 10, 2001
Optical amplifier repeater system
SUMITOMO ELECTRIC INDUSTRIES93 citations98
US6067392AMay 23, 2000
Optical fiber diffraction grating, a method of fabricating thereof and a laser light source
SUMITOMO ELECTRIC INDUSTRIES97 citations96
US5680491AOct 21, 1997
Optical fiber dispersion compensation device for optical communication system
SUMITOMO ELECTRIC INDUSTRIES45 citations96
US4822399AApr 18, 1989
Glass preform for dispersion shifted single mode optical fiber and method for the production of the same
SUMITOMO ELECTRIC INDUSTRIES63 citations96
US6055081AApr 25, 2000
Chromatic dispersion compensator and chromatic dispersion compensating optical communication system
SUMITOMO ELECTRIC INDUSTRIES56 citations95
US5701188ADec 23, 1997
Chromatic dispersion compensator and chromatic dispersion compensating optical communication system
SUMITOMO ELECTRIC INDUSTRIES66 citations95
US6317538B1Nov 13, 2001
Optical waveguide device and optical device having long-period grating
SUMITOMO ELECTRIC INDUSTRIES23 citations93
US5835259ANov 10, 1998
Optical fiber amplifier
SUMITOMO ELECTRIC INDUSTRIES21 citations93
US5742427AApr 21, 1998
Optical fiber amplifier
SUMITOMO ELECTRIC INDUSTRIES22 citations93
US5721635AFeb 24, 1998
Optical fiber amplifier and optical amplifier repeater
SUMITOMO ELECTRIC INDUSTRIES21 citations92
US5532870AJul 2, 1996
Optical fiber amplifier and optical amplifier repeater
SUMITOMO ELECTRIC INDUSTRIES32 citations92
US5430822AJul 4, 1995
Optical communication system including dispersion compensating optical fibers
SUMITOMO ELECTRIC INDUSTRIES25 citations92
US5077814ADec 31, 1991
Optical transmission line for use in an optical communication system
SUMITOMO ELECTRIC INDUSTRIES28 citations92
US6625187B1Sep 23, 2003
Semiconductor optical device and method of manufacturing the same
SUMITOMO ELECTRIC INDUSTRIES21 citations91
US5381261AJan 10, 1995
Optical isolator
SUMITOMO ELECTRIC INDUSTRIES28 citations91
US5214728AMay 25, 1993
Light communication system
SUMITOMO ELECTRIC INDUSTRIES36 citations89
US5136670AAug 4, 1992
Method for optical switching and an optical switch
SUMITOMO ELECTRIC INDUSTRIES29 citations89
US6415078B1Jul 2, 2002
Laser light source and manufacturing method therefor
SUMITOMO ELECTRIC INDUSTRIES16 citations84
US4840482AJun 20, 1989
Method of coated fiber identification in optical transmission network
SUMITOMO ELECTRIC INDUSTRIES21 citations82
US6512613B1Jan 28, 2003
WDM transmission repeater, WDM transmission system and WDM transmission method
SUMITOMO ELECTRIC INDUSTRIES12 citations74
US6504647B1Jan 7, 2003
Optical fiber amplifier, a method of amplifying optical signals, optical communications system
SUMITOMO ELECTRIC INDUSTRIES8 citations74
US5694239ADec 2, 1997
Optical phase conjugator, optical transmission system using the same, and optical phase conjugation method
SUMITOMO ELECTRIC INDUSTRIES17 citations74
US5572356ANov 5, 1996
Optical amplifier
SUMITOMO ELECTRIC INDUSTRIES8 citations74
US5214524AMay 25, 1993
Optical communication system
SUMITOMO ELECTRIC INDUSTRIES11 citations74
US5184244AFeb 2, 1993
Optical communication system and communication method
SUMITOMO ELECTRIC INDUSTRIES8 citations74
US4848872AJul 18, 1989
Optical fiber core collator
SUMITOMO ELECTRIC INDUSTRIES11 citations74
US9244217B2Jan 26, 2016
Bi-directional optical communication method and multi-core optical fiber
SUMITOMO ELECTRIC INDUSTRIES3 citations73
US6952309B1Oct 4, 2005
Optical amplifier and optical amplification method
SUMITOMO ELECTRIC INDUSTRIES11 citations73
US5640269AJun 17, 1997
Optical fiber amplifier and optical amplifier repeater
SUMITOMO ELECTRIC INDUSTRIES5 citations73
US5167685ADec 1, 1992
Method for manufacturing a fiber type coupler
SUMITOMO ELECTRIC INDUSTRIES14 citations73
US5129020AJul 7, 1992
Wavelength selective optical fiber coupler
SUMITOMO ELECTRIC INDUSTRIES11 citations73
US5046804ASep 10, 1991
Method for manufacturing a fiber type coupler
SUMITOMO ELECTRIC INDUSTRIES6 citations73
US6898002B2May 24, 2005
Optical device, optical module, optical amplifier, and optical transmission system
SUMITOMO ELECTRIC INDUSTRIES2 citations62
US7330302B2Feb 12, 2008
Optical transmission system
SUMITOMO ELECTRIC INDUSTRIES1 citations52
US5509098AApr 16, 1996
Optical transmission line and a method of forming thereof
SUMITOMO ELECTRIC INDUSTRIES1 citations52
US7027215B2Apr 11, 2006
Optical component, optical amplification module, and optical transmission system
SUMITOMO ELECTRIC INDUSTRIES1 citations51
USRE35222EApr 30, 1996
Optical fiber component optical coupler and method of producing thereof
SUMITOMO ELECTRIC INDUSTRIES1 citations50
US5202947AApr 13, 1993
Optical fiber component optical coupler and method of producing thereof
SUMITOMO ELECTRIC INDUSTRIES1 citations50