Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7869673 | Remote larger effective area optical fiber | Do-Il Chang | 2011-01-11 |
| 7742223 | System and method for implementing a boosterless optical communication system | Do-Il Chang, Andrzej Kaminski | 2010-06-22 |
| 7665909 | System and method for implementing a high capacity unrepeatered optical communication system | Philippe Perrier, Sergey Burtsev, Do-Il Chang, Andrzej Kaminski | 2010-02-23 |
| 7567593 | System and method for fractional Raman order pumping in optical communication systems | Herve A. Fevrier, Do-Il Chang, Andrzej Kaminski | 2009-07-28 |
| 7340185 | Optical signal receiver with dual stage soft detection | Nandakumar Ramanujam | 2008-03-04 |
| 7336869 | System and method for implementing a high capacity unrepeatered optical communication system | Philippe Perrier, Sergey Burtsev, Do-Il Chang, Andrzej Kaminski | 2008-02-26 |
| 6825973 | Reducing leading edge transients using co-propagating pumps | Michel W. Chbat, Jason D. Henrie, Sergey Burtsev, Frederic L. Barthelemy, Ned A. Weaver | 2004-11-30 |
| 6810214 | Method and system for reducing degradation of optical signal to noise ratio | Michel W. Chbat, Herve A. Fevrier, Pavle Gavrilovic, Hyunchin Kim | 2004-10-26 |
| 6604872 | Method and apparatus for improving spectral efficiency in fiber-optic communication systems | Alexei N. Pilipetskii | 2003-08-12 |
| 6452707 | Method and apparatus for improving spectral efficiency in fiber-optic communication systems | Alexei N. Pilipetskii | 2002-09-17 |
| 6341023 | Multiple level modulation in a wavelength-division multiplexing (WDM) systems | — | 2002-01-22 |