Inventor
TADANAGA OSAMU
JP28 patents
⚠️ This page may combine multiple inventors who share the name “TADANAGA OSAMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
27 patentsUS6806986B2Oct 19, 2004
Wavelength converter and wavelength converting apparatus
NIPPON TELEGRAPH & TELEPHONE27 citations92
US7573921B2Aug 11, 2009
Laser light source
NIPPON TELEGRAPH & TELEPHONE16 citations82
US7391795B2Jun 24, 2008
Laser light source
NIPPON TELEGRAPH & TELEPHONE9 citations82
US11442225B2Sep 13, 2022
Wavelength conversion element and method for manufacturing wavelength conversion element
NIPPON TELEGRAPH & TELEPHONE2 citations72
US11385521B2Jul 12, 2022
Wavelength conversion apparatus
NIPPON TELEGRAPH & TELEPHONE3 citations72
US11852953B2Dec 26, 2023
Optical element and manufacturing method thereof
NIPPON TELEGRAPH & TELEPHONE2 citations71
US11644735B2May 9, 2023
Wavelength conversion element
NIPPON TELEGRAPH & TELEPHONE2 citations71
US6549553B1Apr 15, 2003
Vertical-cavity surface-emitting semiconductor laser
NIPPON TELEGRAPH & TELEPHONE8 citations71
US12346000B2Jul 1, 2025
Planar optical waveguide device for measuring amplitude phase of squeezed light
NIPPON TELEGRAPH & TELEPHONE0 citations61
US12339564B2Jun 24, 2025
Wavelength conversion apparatus
NIPPON TELEGRAPH & TELEPHONE0 citations61
US11971644B2Apr 30, 2024
Wavelength conversion device
NIPPON TELEGRAPH & TELEPHONE1 citations61
US11892745B2Feb 6, 2024
Wavelength conversion element and method for manufacturing same
NIPPON TELEGRAPH & TELEPHONE0 citations61
US11740537B2Aug 29, 2023
Optical signal processing circuit
NIPPON TELEGRAPH & TELEPHONE2 citations61
US11733584B2Aug 22, 2023
Wavelength conversion apparatus
NIPPON TELEGRAPH & TELEPHONE0 citations61
US7940451B2May 10, 2011
Wavelength converter and wavelength conversion apparatus
NIPPON TELEGRAPH & TELEPHONE2 citations60
US12007666B2Jun 11, 2024
Wavelength conversion element and method for producing same
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11387909B2Jul 12, 2022
Optical signal transmitter
NIPPON TELEGRAPH & TELEPHONE0 citations51
US12153325B2Nov 26, 2024
Wavelength converter
NIPPON TELEGRAPH & TELEPHONE0 citations50
US12085836B2Sep 10, 2024
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE0 citations50
US12032269B2Jul 9, 2024
Wavelength conversion apparatus
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11888528B2Jan 30, 2024
Optical communication system
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11815715B2Nov 14, 2023
Planar optical waveguide device
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11815785B2Nov 14, 2023
Wavelength conversion optical element
NIPPON TELEGRAPH & TELEPHONE0 citations50
US11768421B2Sep 26, 2023
Wavelength conversion device
NIPPON TELEGRAPH & TELEPHONE0 citations50
US6846685B2Jan 25, 2005
Vertical-cavity surface-emitting semiconductor laser
NIPPON TELEGRAPH & TELEPHONE0 citations50
US10156517B2Dec 18, 2018
N2O analysis device and analysis method
NIPPON TELEGRAPH & TELEPHONE0 citations49
US10101270B2Oct 16, 2018
SO3 analysis method and analysis device
NIPPON TELEGRAPH & TELEPHONE0 citations39