Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12199670 | Optimal operation method of high-frequency phase dithering technique for compensating for interference noise in analog-optical transmission-based mobile fronthaul network, and transmitter using same | Byunggon Kim, Sunghyun BAE, Minsik Kim | 2025-01-14 |
| 11799556 | Optical-time-division-multiplexed transmission system using sinusoidally modulated optical signal as input pulse source | Sunghyun BAE, Byunggon Kim, Minsik Kim | 2023-10-24 |
| 9819417 | Method and apparatus for generating optical polar return-to-zero amplitude modulation signal using reflective semiconductor optical amplifier and wavelength-division-multiplexed passive optical network system using the same | Hyun Kyu Shim, Hoon Kim | 2017-11-14 |
| 9154226 | Optical signal quality monitoring method and apparatus using a software-based synchronized amplitude histogram | Hyeok Choi, Jun H. Chang | 2015-10-06 |
| 9036969 | Spot size converters and methods of manufacturing the same | Oh Kee Kwon, Chul-Wook Lee, Dong Hun Lee, Young Ahn Leem, Young-Tak Han +1 more | 2015-05-19 |
| 8937980 | Distributed feedback-laser diodes | Oh Kee Kwon, Su Hwan Oh, Young Ahn Leem, O-Kyun Kwon, Young-Tak Han +1 more | 2015-01-20 |
| 8509613 | Monitoring of optical transmission systems based on cross-correlation operation | Yuichi Takushima | 2013-08-13 |
| 7881613 | Wavelength tracking apparatus and method in WDM-PON system | Byoung Whi Kim, Woo-Ram Lee, Eui Seung Son, Jang Won Chae | 2011-02-01 |
| 7848643 | Communication recovering system for wavelength division multiplexed passive optical network | Eui Seung Son, Kyung Woo Lim, Kwan Hee Han | 2010-12-07 |
| 7809227 | Optical fiber, and optical access network, local area network and optical parts for communication, which use the optical fiber | Jun Haeng Lee, Eui Seung Son, Jang Won Chae | 2010-10-05 |
| 7558477 | Communication recovering system for wavelength division multiplexed passive optical network | Eui Seung Son, Kyung Woo Lim, Kwan Hee Han | 2009-07-07 |
| 7542673 | Fault localization apparatus for optical line in wavelength division multiplexed passive optical network | Eui Seung Son, Kyung Woo Lim, Kwan Hee Han | 2009-06-02 |
| 7257324 | Apparatus for monitoring optical signal-to-noise ratio | Chun Ju Youn, Keun Joo Park, Jun Haeng Lee | 2007-08-14 |
| 7177541 | OSNR monitoring method and apparatus for the optical networks | Jun Haeng Lee | 2007-02-13 |
| 7149428 | OSNR monitoring method and apparatus using tunable optical bandpass filter and polarization nulling method | Seung Kyun Shin, Chul Han Kim | 2006-12-12 |
| 7050658 | Method and apparatus for reducing system deterioration caused by polarization effects | Jun Haeng Lee, Chun Ju Youn | 2006-05-23 |
| 6895185 | Multi-purpose optical fiber access network | Hoon Kim | 2005-05-17 |
| 6813425 | Fiber optic cable for increased transmission capacity and wavelength division multiplexing optical transmission system using the same | Dong Young Kim | 2004-11-02 |
| 6813021 | Method and apparatus for monitoring optical signal-to-noise ratio (OSNR) using polarization-nulling method | Chul Han Kim, Dae-Kwang Jung, Jun Hang Lee | 2004-11-02 |
| 6597482 | Multiplexing/demultiplexing apparatus for wavelength division multiplexed system and wavelength division multiplexed passive optical subscriber networks using the same apparatus | Chang Hee Lee, Dae-Kwang Jung, Seung Kyun Shin | 2003-07-22 |
| 6548806 | Apparatus for monitoring frequency of WDM signals using pilot tone | Seung Kyun Shin, Keun Joo Park | 2003-04-15 |
| 6538784 | Multicast-capable optical cross-connect with layered modularity | Chang Hee Lee, Hyun Deok Kim | 2003-03-25 |
| 6532106 | All-optical gain controlled bidirectional add/drop optical amplifier | Chul Han Kim | 2003-03-11 |
| 6501573 | Apparatus and method for monitoring the qualities of optical signal using clock amplitude | Chang Hee Lee, Sang-Young Shin, Jong-Nam Lee | 2002-12-31 |
| 6433864 | Apparatus for monitoring optical signal-to-noise ratio of optical signals in WDM optical transmission system | Seung Kyun Shin, Keun Joo Park | 2002-08-13 |