Issued Patents All Time
Showing 26–50 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9712249 | Methods and systems for superchannel subcarrier monitoring using amplitude modulated tones | Inwoong Kim, Motoyoshi Sekiya | 2017-07-18 |
| 9698912 | Methods and systems for superchannel subcarrier monitoring using frequency modulation tones | Inwoong Kim, Motoyoshi Sekiya | 2017-07-04 |
| 9673907 | Constellation shaping of modulation formats for optical communication systems | Inwoong Kim, Tadashi Ikeuchi | 2017-06-06 |
| 9654223 | Superchannel power pre-emphasis based on transmission criteria | Inwoong Kim, Motoyoshi Sekiya | 2017-05-16 |
| 9614638 | Methods and systems for periodic optical filtering to identify tone modulated optical signals | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2017-04-04 |
| 9515734 | System and method for cross-phase modulation noise reduced transmission in hybrid networks | Inwoong Kim | 2016-12-06 |
| 9485554 | Methods and systems for using modulation frequencies for optical channel monitoring with periodic optical filtering | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2016-11-01 |
| 9485019 | Methods and systems for optical channel monitoring with periodic optical filtering of dual polarization signals | Inwoong Kim, Motoyoshi Sekiya | 2016-11-01 |
| 9461745 | Optimizing optical network simulations | Inwoong Kim, Motoyoshi Sekiya | 2016-10-04 |
| 9372830 | System and method to analyze impairment of optical transmissions due to combined nonlinear and polarization dependent loss | Motoyoshi Sekiya | 2016-06-21 |
| 9344190 | Flexible placement of spectral inverters in optical networks | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2016-05-17 |
| 9344194 | System and method for monitoring and control of an optical modulator for an M-QAM transmitter | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2016-05-17 |
| 9312914 | Crosstalk reduction in optical networks using variable subcarrier power levels | Motoyoshi Sekiya | 2016-04-12 |
| 9197320 | System and method for monitoring polarization-dependent loss | Inwoong Kim, Motoyoshi Sekiya | 2015-11-24 |
| 9197323 | Asymmetric compensation of polarization dependent loss in dual-polarization optical systems | Inwoong Kim, Jeng-Yuan Yang, Motoyoshi Sekiya | 2015-11-24 |
| 9112609 | Mitigation of polarization dependent loss in optical multi-carrier/super-channel transmission | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2015-08-18 |
| 9100137 | Crosstalk reduction in optical networks using variable subcarrier spectral allocation | Motoyoshi Sekiya, Takeshi Hoshida | 2015-08-04 |
| 9042730 | System and method for compensating signal degradation in dual polarization optical systems | Inwoong Kim, Motoyoshi Sekiya | 2015-05-26 |
| 8989571 | In-band supervisory data modulation using complementary power modulation | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2015-03-24 |
| 8989595 | Mitigation of optical signal to noise ratio degradation arising from polarization dependent loss | Inwoong Kim, Motoyoshi Sekiya | 2015-03-24 |
| 8983290 | System and method for monitoring a dual-polarization signal using an in-band supervisory signal | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya, Jeng-Yuan Yang | 2015-03-17 |
| 8977137 | Polarization dependent loss compensation | Inwoong Kim, Motoyoshi Sekiya | 2015-03-10 |
| 8798481 | Method and system for compensation of laser phase/frequency noise in an optical device | Inwoong Kim | 2014-08-05 |
| 8761600 | In-band supervisory data modulation | Inwoong Kim, Paparao Palacharla, Motoyoshi Sekiya | 2014-06-24 |
| 8644704 | Method and system for an adaptive channel grid of an optical network | Motoyoshi Sekiya, Martin Bouda | 2014-02-04 |