IM/DD-Based 112-Gb/s/lambda PAM-4 Transmission Using 18-Gbps DML

Single-channel 112-Gb/s PAM-4 transmission based on low-cost intensity modulation and direct detection (IM/DD) optics is experimentally demonstrated over 1-km standard single-mode fiber. By employing a digital precompensation, duobinary encode/decoding with PAM-4 signal and 7-level training-sequence-aided least mean square (TS-LMS) algorithm, we successfully achieve a receiver sensitivity of about -2 dBm with 7% overhead HD-FEC. Chirp management is applied at the transmitter side to extend the reach to 1 km for transmission at 1500 nm. This is the first demonstration, to the best of our knowledge, that 112-Gb/s PAM-4 modulation is achieved using only a 18-GHz (3-dB-bandwidth) commercial directly modulated laser. The method proposed in this paper is both bandwidth and computationally efficient, which is thought to be feasible in the low-cost short-reach optical applications.

[1]  A. Lender.  Correlative Digital Communication Techniques , 1964 .

[2]  David Falconer,et al.  Frequency domain equalization for single-carrier broadband wireless systems , 2002, IEEE Commun. Mag..

[3]  Ting Wang,et al.  Transmission of 32-Tb/s Capacity Over 580 km Using RZ-Shaped PDM-8QAM Modulation Format and Cascaded Multimodulus Blind Equalization Algorithm , 2010, Journal of Lightwave Technology.

[4]  M. Chagnon,et al.  Experimental study of 112 Gb/s short reach transmission employing PAM formats and SiP intensity modulator at 1.3 μm. , 2014, Optics express.

[5]  Idelfonso Tafur Monroy,et al.  Multiband Carrierless Amplitude Phase Modulation for High Capacity Optical Data Links , 2014, Journal of Lightwave Technology.

[6]  Abdullah S. Karar,et al.  100 Gb/s Intensity Modulation and Direct Detection , 2014, Journal of Lightwave Technology.

[7]  Masato Nishihara,et al.  130-Gbps DMT transmission using silicon Mach-Zehnder modulator with chirp control at 1.55-µm , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[8]  Juan Jose Vegas Olmos,et al.  Direct modulation of 56 Gbps duobinary-4-PAM , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[9]  Christian Neumeyr,et al.  Single-VCSEL 100-Gb/s short-reach system using discrete multi-tone modulation and direct detection , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[10]  Wei Chen,et al.  Experimental demonstration of 500Gbit/s short reach transmission employing PAM4 signal and direct detection with 25Gbps device , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[11]  Nobuhiko Kikuchi,et al.  Practical implementation of 100-Gbit/s/lambda optical short-reach transceiver with Nyquist PAM4 signaling using electroabsorptive modulated laser (EML) , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[12]  Tao Gui,et al.  Experimental study of PAM-4, CAP-16, and DMT for 100 Gb/s short reach optical transmission systems. , 2015, Optics express.

[13]  Weisheng Hu,et al.  28 Gb/s duobinary signal transmission over 40 km based on 10 GHz DML and PIN for 100 Gb/s PON. , 2015, Optics express.

[14]  Dan Sadot,et al.  Single channel 112Gbit/sec PAM4 at 56Gbaud with digital signal processing for data centers applications , 2015, OFC 2015.

[15]  Jianjun Yu,et al.  Demonstration of Single-Carrier ETDM 400GE PAM-4 Signals Generation and Detection , 2015, IEEE Photonics Technology Letters.