Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10718899 | Optical device, wavelength division multiplexing transmitter, wavelength division multiplexing receiver, and wavelength division multiplexing transmission and receiving system | — | 2020-07-21 |
| 10386573 | Substrate-type optical waveguide and introducing method using fundamental and higher TE/TM modes | — | 2019-08-20 |
| 10365507 | Semiconductor optical integrated circuit | Norihiro Ishikura | 2019-07-30 |
| 10267995 | Substrate-type optical waveguide and substrate-type optical modulator | Shinichi Sakamoto, Norihiro Ishikura | 2019-04-23 |
| 10261385 | Light modulation element | — | 2019-04-16 |
| 10162136 | Optical transmission device and bidirectional optical transmission device | Katsuhiro Takenaga | 2018-12-25 |
| 9880404 | Optical waveguide device and method of manufacturing the same | Kensuke Ogawa, Guo-Qiang Lo, Tsung-Yang Liow, Xiaoguang Tu | 2018-01-30 |
| 9874697 | Polarization-maintaining optical fiber and bidirectional optical transmission apparatus | — | 2018-01-23 |
| 9869816 | Light combining/dividing element and light modulator | Norihiro Ishikura | 2018-01-16 |
| 9864215 | Substrate-type optical waveguide and substrate-type optical modulator | Shinichi Sakamoto, Norihiro Ishikura | 2018-01-09 |
| 9857533 | Optical waveguide element, light-receiving device, optical communication device, optical modulator, optical resonator, and method for manufacturing optical waveguide element | Hiroyuki Kusaka, Ryokichi Matsumoto, Kensuke Ogawa | 2018-01-02 |
| 9857534 | Optical waveguide device having a light absorber for split out modes | Hiroyuki Kusaka, Kensuke Ogawa | 2018-01-02 |
| 9817294 | Optical modulation device | Hiroki Ishihara, Kensuke Ogawa, Kenji Oda, Hiroyuki Kusaka, Ryokichi Matsumoto +1 more | 2017-11-14 |
| 9557482 | High-order polarization conversion device, optical waveguide device, and DP-QPSK modulator | Akira Oka, Kensuke Ogawa, Hiroyuki Kusaka | 2017-01-31 |
| 9529151 | Polarization conversion element | Akira Oka, Hiroyuki Kusaka, Kensuke Ogawa | 2016-12-27 |
| 9448425 | Optical waveguide element and optical modulator | Kensuke Ogawa, Hiroyuki Kusaka | 2016-09-20 |
| 9335472 | Planar optical waveguide device and DP-QPSK modulator | Akira Oka, Kensuke Ogawa, Hiroyuki Kusaka | 2016-05-10 |
| 9110348 | Optical element and Mach-Zehnder optical waveguide element | Kensuke Ogawa | 2015-08-18 |
| 9008476 | Polarization conversion device | Akira Oka, Kensuke Ogawa, Hiroyuki Kusaka | 2015-04-14 |
| 8404133 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Yong Tsong Tan, Ning Guan, Mingbin Yu +2 more | 2013-03-26 |
| 8227178 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Yong Tsong Tan, Ning Guan, Mingbin Yu +2 more | 2012-07-24 |