Inventor
NAKAZAWA TADAO
JP36 patents
Patents
36 patentsUS6351323B1Feb 26, 2002
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD87 citations98
US5680497AOct 21, 1997
Optical waveguide device
FUJITSU LTD43 citations95
US5404412AApr 4, 1995
Optical waveguide device
FUJITSU LTD80 citations95
US6721085B2Apr 13, 2004
Optical modulator and design method therefor
FUJITSU LTD20 citations93
US7362925B2Apr 22, 2008
Control method and control apparatus of optical device
FUJITSU LTD18 citations92
US6934433B2Aug 23, 2005
Control method and control apparatus of optical device
FUJITSU LTD17 citations92
US6847662B2Jan 25, 2005
Wavelength-selectable laser capable of high-speed frequency control
FUJITSU LTD38 citations92
US6678428B2Jan 13, 2004
Optical modulator
FUJITSU LTD22 citations92
US6583900B2Jun 24, 2003
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD27 citations92
US5214724AMay 25, 1993
Optical waveguide device with suppressed dc drift
FUJITSU LTD51 citations92
US7340114B2Mar 4, 2008
Optical waveguide device and optical modulator
FUJITSU LTD17 citations84
US7177490B2Feb 13, 2007
Optical waveguide, optical device, and method of manufacturing optical waveguide
FUJITSU LTD10 citations84
US6867901B2Mar 15, 2005
Optical modulator and design method therefor
FUJITSU LTD14 citations84
US6741378B2May 25, 2004
Optical modulator having element for varying optical phase by electrooptic effect
FUJITSU LTD14 citations84
US6643060B2Nov 4, 2003
Multi-wavelength light source utilizing acousto-optic tunable filter
FUJITSU LTD17 citations84
US6400881B1Jun 4, 2002
Optical device having thin film formed over optical waveguide
FUJITSU LTD14 citations84
US6917732B2Jul 12, 2005
Connecting method of optical function devices, and optical apparatus
FUJITSU LTD12 citations83
US7054512B2May 30, 2006
Optical waveguide, optical device, and method of manufacturing optical waveguide
FUJITSU LTD10 citations74
US6999223B2Feb 14, 2006
Optical modulator
FUJITSU LTD6 citations74
US6697543B2Feb 24, 2004
Optical waveguide filter
FUJITSU LTD7 citations74
US6594069B1Jul 15, 2003
Control method and control apparatus of optical wavelength variable filter
FUJITSU LTD7 citations74
US6549328B2Apr 15, 2003
Acousto-optic tunable filter
FUJITSU LTD7 citations74
US7239764B2Jul 3, 2007
Optical waveguide device with reduced driving voltage
FUJITSU LTD5 citations63
US7116907B1Oct 3, 2006
Acousto-optical tunable filters cascaded together
FUJITSU LTD4 citations63
US6950218B2Sep 27, 2005
Optical modulator
FUJITSU LTD6 citations63
US6768570B2Jul 27, 2004
Optical modulator
FUJITSU LTD4 citations63
US6728487B2Apr 27, 2004
Drive method for a plurality of acousto-optic filters, acousto-optic filter apparatus, and selective wavelength extension method
FUJITSU LTD2 citations63
US6701031B2Mar 2, 2004
Acousto-optical tunable filter, method of driving the same, and optical add/drop multiplexer
FUJITSU LTD4 citations63
US6370308B1Apr 9, 2002
Acousto-optical device
FUJITSU LTD4 citations63
US7095559B2Aug 22, 2006
Variable optical delay circuit
FUJITSU LTD5 citations62
US6870972B2Mar 22, 2005
Connecting method of optical devices, and optical apparatus
FUJITSU LTD3 citations61
US7430344B2Sep 30, 2008
Acousto-optic device and fabrication method of acousto-optic device
FUJITSU LTD1 citations52
US7218797B2May 15, 2007
Acousto-optic device and fabrication method of acousto-optic device
FUJITSU LTD0 citations52
US6873748B2Mar 29, 2005
Optical modulator module and optical modulator
FUJITSU LTD0 citations52
US6783282B2Aug 31, 2004
Optical wavelength filter
FUJITSU LTD0 citations52
US6925214B2Aug 2, 2005
Connecting method of optical function devices, and optical apparatus
FUJITSU LTD0 citations51