Inventor
OIKAWA YOICHI
JP29 patents
⚠️ This page may combine multiple inventors who share the name “OIKAWA YOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
26 patentsUS6810215B1Oct 26, 2004
Optical repeater converting wavelength and bit rate between networks
FUJITSU LTD40 citations96
US5386488AJan 31, 1995
Optical module and manufacturing method therefor
FUJITSU LTD75 citations96
US7440648B2Oct 21, 2008
Wavelength selective switch
FUJITSU LTD40 citations92
US6252698B1Jun 26, 2001
Method and device for wavelength conversion, and system including the device
FUJITSU LTD26 citations92
US6074102AJun 13, 2000
Optical device capable of operating at high speeds
FUJITSU LTD37 citations92
US5999289ADec 7, 1999
Detection of, and compensation for, waveform change due to chromatic dispersion
FUJITSU LTD47 citations92
US5293087AMar 8, 1994
Filter circuit and filter integrated circuit
FUJITSU LTD28 citations92
US7831118B2Nov 9, 2010
Coarse wavelength division multiplexing optical transmission system, and coarse wavelength division multiplexing optical transmission method
FUJITSU LTD11 citations82
US6907154B2Jun 14, 2005
Optical switch having switch cells with movable switch mirrors
FUJITSU LTD6 citations74
US6813410B2Nov 2, 2004
Optical switch for compensating for degradation of optical-coupling characteristic
FUJITSU LTD7 citations74
US5324954AJun 28, 1994
Systems for adjusting and evaluating positional relationship between light-receiving element and optical fiber
FUJITSU LTD12 citations74
US5506542AApr 9, 1996
Filter circuit and filter integrated circuit
FUJITSU LTD11 citations73
US7522843B2Apr 21, 2009
Optical repeater converting wavelength and bit rate between networks
FUJITSU LTD3 citations63
US7424227B2Sep 9, 2008
Optical repeater converting wavelength and bit rate between networks
FUJITSU LTD2 citations63
US7269314B2Sep 11, 2007
Dispersion compensation device
FUJITSU LTD2 citations63
US6819828B2Nov 16, 2004
Method and device for optical fiber transmission
FUJITSU LTD6 citations63
US6748130B2Jun 8, 2004
Optical switch and using method therefor
FUJITSU LTD4 citations63
US7443503B2Oct 28, 2008
Polarization measuring apparatus
FUJITSU LTD2 citations62
US6999648B2Feb 14, 2006
Optical cross-connect apparatus
FUJITSU LTD4 citations62
US7151866B2Dec 19, 2006
Optical device module
FUJITSU LTD4 citations61
US7476038B2Jan 13, 2009
Optical device module
FUJITSU LTD3 citations58
US7379636B2May 27, 2008
Optical switch
FUJITSU LTD0 citations52
US7206476B2Apr 17, 2007
Optical switch
FUJITSU LTD0 citations52
US6901179B2May 31, 2005
Optical switch and using method therefor
FUJITSU LTD1 citations52
US7486857B2Feb 3, 2009
Temperature-independent optical wavelength identification apparatus and optical wavelength identification method
FUJITSU LTD0 citations42
US7106927B2Sep 12, 2006
Optical cross-connect apparatus
FUJITSU LTD0 citations42