TY - GEN
T1 - Performance evaluation of 6-level PSK signal using differential demodulation with partial symbol delay
AU - Choi, H. Y.
AU - Morita, I.
PY - 2011
Y1 - 2011
N2 - We demonstrate an optical transmission system based on a 6-level PSK modulation format and differential detection with a partial symbol delay. The 6-level PSK signal is simply generated by using a chirp-free Mach-Zehnder modulator followed by a phase modulator. In order to convert the phase information of the 6-level PSK signal into the intensity, we utilize a pair of two Mach-Zehnder delay-line interferometers with having a differential delay less than the symbol duration of the signal unlike a conventional differential detection scheme. We evaluate the performances of the differential 6-level PSK signal and compare them with that of a conventional DQPSK signal. In addition, the transmission performance of the 21.4-Gb/s 6-level PSK signal is experimentally verified in a 240-km long dispersionmanaged fiber link. Furthermore, additional simulation results show that the tolerance to optical filtering and chromatic dispersion of the 107-Gb/s differential 6-level PSK signal is improved significantly by adopting the partial demodulation scheme.
AB - We demonstrate an optical transmission system based on a 6-level PSK modulation format and differential detection with a partial symbol delay. The 6-level PSK signal is simply generated by using a chirp-free Mach-Zehnder modulator followed by a phase modulator. In order to convert the phase information of the 6-level PSK signal into the intensity, we utilize a pair of two Mach-Zehnder delay-line interferometers with having a differential delay less than the symbol duration of the signal unlike a conventional differential detection scheme. We evaluate the performances of the differential 6-level PSK signal and compare them with that of a conventional DQPSK signal. In addition, the transmission performance of the 21.4-Gb/s 6-level PSK signal is experimentally verified in a 240-km long dispersionmanaged fiber link. Furthermore, additional simulation results show that the tolerance to optical filtering and chromatic dispersion of the 107-Gb/s differential 6-level PSK signal is improved significantly by adopting the partial demodulation scheme.
KW - Differential detection
KW - Differential phase shift keying
KW - Intersymbol interference
KW - Multilevel modulation format
KW - Partial DPSK
UR - http://www.scopus.com/inward/record.url?scp=84855772283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855772283&partnerID=8YFLogxK
U2 - 10.1117/12.905540
DO - 10.1117/12.905540
M3 - Conference contribution
AN - SCOPUS:84855772283
SN - 9780819489579
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Transmission Systems, Subsystems, and Technologies IX
T2 - Optical Transmission Systems, Subsystems, and Technologies IX
Y2 - 13 November 2011 through 16 November 2011
ER -