Abstract

Recently, Half-Cycle Nyquist Subcarrier Modulation (HC-SCM) was proposed to achieve high spectral efficiency in intensity-modulator direct-detection optical links. This paper shows that the HC-SCM scheme has a high computational load and proposes the rational Oversampled Subcarrier Modulation (OVS-SCM) as a computational efficient alternative that, furthermore, improves the spectral efficiency. The presented experimental results show that our 256-QAM proposal allows to transmit below the hard-decision forward error correction, with a throughput of 17.8 Gb/s in a 2.5 GHz bandwidth, and a spectral efficiency of 7.2 b/s/Hz, through 20 km of single-mode optical fiber.

Nyquist-shaped dispersion-precompensated subcarrier modulation with direct detection for spectrally-efficient WDM transmission

M. S. Erkılınç, S. Kilmurray, R. Maher, M. Paskov, R. Bouziane, S. Pachnicke, H. Griesser, B. C. Thomsen, P. Bayvel, and R. I. Killey
Opt. Express 22(8) 9420-9431 (2014)

Signal-signal beat interference cancellation in spectrally-efficient WDM direct-detection Nyquist-pulse-shaped 16-QAM subcarrier modulation

Zhe Li, M. Sezer. Erkılınç, Stephan Pachnicke, Helmut Griesser, Rachid Bouziane, Benn C. Thomsen, Polina Bayvel, and Robert I. Killey
Opt. Express 23(18) 23694-23709 (2015)

Spectrally efficient terabit optical transmission with Nyquist 64-QAM half-cycle subcarrier modulation and direct detection

Kaiheng Zou, Yixiao Zhu, Fan Zhang, and Zhangyuan Chen
Opt. Lett. 41(12) 2767-2770 (2016)

Real-time 20.37 Gb/s optical OFDM receiver for PON IM/DD systems

Julián S. Bruno, Vicenç Almenar, Javier Valls, and Juan L. Corral
Opt. Express 26(15) 18817-18831 (2018)

Experimental demonstration of 608Gbit/s short reach transmission employing half-cycle 16QAM Nyquist-SCM signal and direct detection with 25Gbps EML

Kangping Zhong, Xian Zhou, Yiguang Wang, Liang Wang, Jinhui Yuan, Changyuan Yu, Alan Pak Tao Lau, and Chao Lu
Opt. Express 24(22) 25057-25067 (2016)