상세정보
학술지
Optimization of Operating Conditions in 112-Gb/s Polarization-Multiplexed 16-QAM Optical Modulation
- 발행일
- 201106
- 출처
- IEEE Photonics Technology Letters, v.23 no.11, pp.724-726
- ISSN
- 1041-1135
- 출판사
- IEEE
- 협약과제
- 10MI1700, 100Gbps급 이더넷 및 광전송기술개발, 김광준
- 초록
- In this letter, we analyze a 16-ary quadrature amplitude modulation (16-QAM) optical signal generated by applying four-level electrical signals to a single in-phase/quadrature (IQ)-modulator. The amplitude of optical output of the MachZehnder modulator (MZM) in the IQ-modulator needs to be carefully adjusted, and the limited extinction ratio of MZM results in unwanted phase offset. Required optical signal-to-noise ratio is estimated in the 112-Gb/s polarization-division-multiplexed (PDM) 16-QAM signal by numerical simulations with various amplitudes of the electrical modulation signals. Optimal operating conditions are found to guarantee the best performance of the received PDM 16-QAM signal. © 2011 IEEE.
- KSP 제안 키워드
- 16 quadrature amplitude modulation(16QAM), 16-ary quadrature amplitude modulation, Best performance, Electrical modulation, Electrical signal, IQ modulator, In-phase, Mach-Zehnder(MZ), Numerical simulations, Operating conditions, Optical Signal-To-Noise Ratio(OSNR)