Inventor
TAKABAYASHI KAZUMASA
JP35 patents
⚠️ This page may combine multiple inventors who share the name “TAKABAYASHI KAZUMASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
26 patentsUS6847662B2Jan 25, 2005
Wavelength-selectable laser capable of high-speed frequency control
FUJITSU LTD38 citations92
US10312663B2Jun 4, 2019
Tunable laser device
FUJITSU LTD7 citations84
US9793684B2Oct 17, 2017
Laser apparatus
FUJITSU LTD8 citations84
US9722397B2Aug 1, 2017
Tunable laser and tunable laser module
FUJITSU LTD7 citations84
US9705282B2Jul 11, 2017
Multi-wavelength laser light source and wavelength multiplexing communication system
FUJITSU LTD9 citations84
US7539378B2May 26, 2009
Optical waveguide device and semiconductor device
FUJITSU LTD11 citations84
US7366220B2Apr 29, 2008
Tunable laser
FUJITSU LTD17 citations84
US9762034B2Sep 12, 2017
Tunable laser source, optical transmitter, and optical transmitter and receiver module
FUJITSU LTD2 citations73
US8860164B2Oct 14, 2014
Light receiving device
FUJITSU LTD4 citations73
US10530119B2Jan 7, 2020
Wavelength locker, wavelength tunable laser apparatus, and method for controlling wavelength tunable laser apparatus
FUJITSU LTD3 citations72
US9698570B2Jul 4, 2017
Optical semiconductor element and method of manufacturing the same
FUJITSU LTD4 citations71
US9147781B2Sep 29, 2015
Light receiving element with offset absorbing layer
FUJITSU LTD2 citations63
US7940819B2May 10, 2011
Tunable laser module, tunable laser apparatus and controlling method for tunable laser
FUJITSU LTD5 citations63
US7873082B2Jan 18, 2011
Semiconductor integrated device
FUJITSU LTD4 citations63
US8666200B2Mar 4, 2014
Optical modulation device, driving method of optical modulation device, and manufacturing method of optical modulation device
FUJITSU LTD3 citations62
US7130322B2Oct 31, 2006
Wavelength tunable laser and method of controlling the same
FUJITSU LTD3 citations61
US10027088B2Jul 17, 2018
Integrated semiconductor optical element and manufacturing method for same
FUJITSU LTD0 citations52
US9966724B2May 8, 2018
Laser and method of controlling laser
FUJITSU LTD1 citations52
US9711938B2Jul 18, 2017
Integrated semiconductor optical element and manufacturing method for same
FUJITSU LTD0 citations52
US9606380B2Mar 28, 2017
Method for manufacturing optical module
FUJITSU LTD0 citations52
US7242697B2Jul 10, 2007
Wavelength selection device, wavelength selection laser, and tunable laser
FUJITSU LTD1 citations52
US7158547B2Jan 2, 2007
Wavelength tunable laser of small size
FUJITSU LTD0 citations52
US8938138B2Jan 20, 2015
Optical semiconductor device and method of manufacturing optical semiconductor device
FUJITSU LTD0 citations50
US9312663B2Apr 12, 2016
Laser device, light modulation device, and optical semiconductor device
FUJITSU LTD0 citations42
US7627212B2Dec 1, 2009
Optical integrated device
FUJITSU LTD0 citations40
US9948059B2Apr 17, 2018
Semiconductor laser light source and fabrication method
FUJITSU LTD0 citations39
FUJITSU OPTICAL COMPONENTS LTD
5 patentsUS11984696B2May 14, 2024
Optical amplifier and inspection method of optical amplifier
FUJITSU OPTICAL COMPONENTS LTD0 citations62
US12300973B2May 13, 2025
Integrated photonic device and photonic integrated circuit using the same
FUJITSU OPTICAL COMPONENTS LTD0 citations61
US12326642B2Jun 10, 2025
Wavelength filter and laser apparatus
FUJITSU OPTICAL COMPONENTS LTD0 citations57
US12047121B2Jul 23, 2024
Optical device, optical transmission apparatus, optical reception apparatus, and optical communication apparatus
FUJITSU OPTICAL COMPONENTS LTD0 citations51
US10560213B2Feb 11, 2020
Optical device
FUJITSU OPTICAL COMPONENTS LTD0 citations40
TAKABAYASHI KAZUMASA
4 patentsUS8428399B2Apr 23, 2013
Optical module, manufacturing method thereof, and optical transmitter
TAKABAYASHI KAZUMASA9 citations82
US8546899B2Oct 1, 2013
Light receiving element, light receiving device, and light receiving module
TAKABAYASHI KAZUMASA6 citations71
US8724938B2May 13, 2014
Optical receiver
TAKABAYASHI KAZUMASA0 citations51
US8710614B2Apr 29, 2014
Light receiving element with offset absorbing layer
TAKABAYASHI KAZUMASA0 citations51