Inventor · disambiguated record
Katsunari Okamoto
Also filed as: OKAMOTO KATSUNARI
22 granted patents·4 pending applications·1,088 citations·filing 1980–2023
97Inventor score
Files withNIPPON TELEGRAPH & TELEPHONE17OKAMOTO KATSUNARI3NTT ELECTRONICS CORP2AIDI CORP1INTELLIGENT FIBER OPTIC SYSTEMS CORP1
Top patents by PatentIndex Score
26 records- 0198US6788865B2Polarization maintaining optical fiber with improved polarization maintaining propertyNIPPON TELEGRAPH & TELEPHONE·Filed 2001·Granted Sep 7, 2004·247 cites·2 claims
- 0298US6404966B1Optical fiberNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Jun 11, 2002·134 cites·32 claims
- 0396US5546483AIntegrated optical waveguide circuit and optical branch line test system using the sameNIPPON TELEGRAPH & TELEPHONE·Filed 1994·Granted Aug 13, 1996·114 cites·19 claims
- 0493US4781424ASingle mode channel optical waveguide with a stress-induced birefringence control regionNIPPON TELEGRAPH & TELEPHONE·Filed 1987·Granted Nov 1, 1988·118 cites·32 claims
- 0592US8098379B2Planar lightwave fourier-transform spectrometerOKAMOTO KATSUNARI·Filed 2010·Granted Jan 17, 2012·16 cites·14 claims
- 0691US8406580B2Planar lightwave fourier-transform spectrometer measurement including phase shifting for error correctionTAKADA KAZUMASA·Filed 2011·Granted Mar 26, 2013·16 cites·13 claims
- 0791US6122419AOptical signal processing apparatus and optical signal processing methodNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Sep 19, 2000·97 cites·16 claims
- 0887US6711313B2CDMA encoder-decoder, CDMA communication system, WDM-CDMA communication systemNIPPON TELEGRAPH & TELEPHONE·Filed 2001·Granted Mar 23, 2004·26 cites·23 claims
- 0986US6304687B1Optical waveguide circuit, its manufacturing method and optical waveguide module having the optical waveguide circuitNIPPON TELEGRAPH & TELEPHONE·Filed 1998·Granted Oct 16, 2001·82 cites·28 claims
- 1086US4372647ASingle mode optical fibersNIPPON TELEGRAPH & TELEPHONE·Filed 1980·Granted Feb 8, 1983·56 cites·7 claims
- 1183US6456760B1Optical signal processing apparatus and optical signal processing methodNIPPON TELEGRAPH & TELEPHONE·Filed 2000·Granted Sep 24, 2002·24 cites·12 claims
- 1280US7020398B2Dispersion slope equalizerNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted Mar 28, 2006·9 cites·8 claims
- 1376US6724957B2Optical filterNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Apr 20, 2004·18 cites·11 claims
- 1476US6278813B1Wavelength division multi/demultiplexerNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Aug 21, 2001·46 cites·27 claims
- 1571US6912362B1Dispersion slope equalizerNIPPON TELEGRAPH & TELEPHONE·Filed 2000·Granted Jun 28, 2005·12 cites·12 claims
- 1668US4480897ASingle-polarization single-mode optical fiberNIPPON TELEGRAPH & TELEPHONE·Filed 1982·Granted Nov 6, 1984·24 cites·2 claims
- 1766US8494319B2Arrayed waveguide grating (AWG) with different radii in the input and output slab regionsOKAMOTO KATSUNARI·Filed 2010·Granted Jul 23, 2013·2 cites·16 claims
- 1866US6898345B2Optical multiplexer and method for its productionNTT ELECTRONICS CORP·Filed 2002·Granted May 24, 2005·7 cites·23 claims
- 1960US7155086B2Optical signal processing device using optical gateNIPPON TELEGRAPH & TELEPHONE·Filed 2001·Granted Dec 26, 2006·7 cites·15 claims
- 2057US5943452AArrayed-waveguide gratingNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Aug 24, 1999·20 cites·4 claims
- 2156US2023333008A1Integrated-Optic Fourier Transform Spectrometer Using Twin Waveguide ArraysINTELLIGENT FIBER OPTIC SYSTEMS CORP·Filed 2023·Application pending·0 cites
- 2253US4525027ASingle mode optical fibersNIPPON TELEGRAPH & TELEPHONE·Filed 1984·Granted Jun 25, 1985·13 cites·4 claims
- 2345US2015168650A1Thin film filter (tff) embedded waveguide wdm device employing parabola-shaped waveguidesSIPHX CORP·Filed 2013·Application pending·0 cites
- 2443US2014375999A1Complex-fish (fourier-transform, integrated-optic spatial heterodyne) spectrometer with n x 4 mmi (multi-mode interference) optical hybrid couplersOKAMOTO KATSUNARI·Filed 2014·Application pending·0 cites
- 2540US6954562B2Matrix switch of optical waveguide type and method for manufacturing the sameNTT ELECTRONICS CORP·Filed 2004·Granted Oct 11, 2005·0 cites·4 claims
- 2638US2011142396A1Athermal silicon photonics array waveguide grating (awg) employing different core geometries in the array waveguidesAIDI CORP·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →