- 6 x 86 Gb/s WDM transmission over 2 km multimode fiber using center launching technique and multi-level modulationHwan Seok Chung
Optical Internet Research Department, Electronics and Telecommunications Research Institute ETRI, Yuseong, Daejeon, Korea
Opt Express 17:8098-102. 2009..The transmission performance over OM2 grade multimode fiber is also compared with OM3 grade multimode fiber and conventional single mode fiber...
- Companding transform based SPM compensation in coherent optical OFDM transmissionHwan Seok Chung
Optical Internet Research Department, Electronics and Telecommunications Research Institute, 218 Gajeong ro, Yuseong Gu, Daejon, 305 700, South Korea
Opt Express 19:B702-9. 2011..The results of bit-error-rate (BER) measurements show that the μ-law companding improves OSNR margin over 5.5 dB after transmission of 1,040 km over SMF...
- Digital non-data-aided symbol synchronization in optical coherent intradyne receptionSun Hyok Chang
Optical Communications Research Center, Electronics and Telecommunications Research Institute 138 Gajeongno, Yuseong, Daejeon, Korea
Opt Express 16:15097-103. 2008..The feedback loop operates stable in the range of symbol rate, 9.7 approximately 10.3 GSymbol/s with 20 GSampling/s at relatively high bit error rate of approximately 2x10(-2)...