| 11626937 |
Optical transmission apparatus and control method of optical transmission apparatus |
Yurie MATSUYAMA |
2023-04-11 |
| 11483067 |
Optical time domain reflectometer, test method of optical transmission line, and test system of optical transmission line |
Yuhei MATSUMOTO, Kazunori Shinya |
2022-10-25 |
| 11476930 |
Optical time domain reflectometer, method of testing optical transmission line, and test system of optical transmission line |
Yuhei MATSUMOTO, Kazunori Shinya |
2022-10-18 |
| 10659165 |
Optical transmission device |
Yurie MATSUYAMA |
2020-05-19 |
| 10539741 |
Optical device with optical filters and processing method of optical signals |
Yurie MATSUYAMA |
2020-01-21 |
| 8879908 |
Optical channel monitor |
— |
2014-11-04 |
| 8837939 |
Wavelength division multiplexing transmission system, optical channel monitor and optical channel monitoring method |
Hiromitsu Sugahara |
2014-09-16 |
| 8238745 |
Collection of data from an optical channel monitor without causing a malfunction of a transmission apparatus |
— |
2012-08-07 |
| 8135280 |
Method and system for power stability control in wavelength division multiplexing networks |
Lei Zong, Ting Wang, Katsuyuki Mino, Osamu Matsuda |
2012-03-13 |
| 8095011 |
Wavelength division multiplexing filter, wavelength division multiplexing system, and wavelength division multiplexing method |
Yutaka Yano |
2012-01-10 |
| 7649162 |
Optical feedback control unit, optical communication system, feedback control method, and recording medium for recording program |
Hiroki Rikiyama, Koji Asahi |
2010-01-19 |
| 7389032 |
Method and apparatus for adjusting loss caused by optical fiber curvature, and optical transmission system using the same |
— |
2008-06-17 |
| 7127183 |
Output monitor/control apparatus and optical communication system |
— |
2006-10-24 |
| 6911627 |
Heating element device, heating element mounted structure, temperature control circuit, temperature control apparatus, and module |
Nobutaka Watanabe |
2005-06-28 |
| 6601401 |
Temperature controller and light-waveguide with the same |
— |
2003-08-05 |
| 6597483 |
Laser oscillation wavelength monitoring device |
— |
2003-07-22 |
| 5936768 |
Optical passive device for an optical fiber amplifier and the optical amplifier |
— |
1999-08-10 |
| 5880874 |
Optical equalizer and optical amplifier and wavelength multiple optical transmission apparatus using optical equalizer |
Takashi Shibuya |
1999-03-09 |