High-Spectral-Efficiency 600-Gbps/Carrier Transmission Using PDM-256QAM Format
- 28 December 2018
- journal article
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Journal of Lightwave Technology
- Vol. 37 (2), 470-476
- https://doi.org/10.1109/jlt.2018.2890124
Abstract
High-capacity carrier signals with high-order modulation are being considered for data center interconnection (DCI) applications as they can reduce the cost per bit by decreasing the number of devices and increasing fiber capacity. However, signal quality degradation due to device imperfections affecting the frequency response has limited the capacity per carrier of PDM-256QAM signals to under 400 Gbps. Here, it is possible to use a calibration method for dealing with device imperfections wherein a fixed equalizer separately calibrates the frequency response of the transmitter and receiver. Our previous study showed that PDM-256QAM signals at up to 48 GBaud could be transmitted over 100 km, while it used an experimental setup with total 3-dB analog bandwidth of 13 and 20 GHz for transmitter and receiver, respectively. Amicro-integrable tunable laser assembly with a typical linewidth of 20 kHz, maximum under 100 kHz. Actual DCI applications, however, are expected to use dense wavelength division multiplexing (WDM), so in this study, we examined transmission of 10-WDM 48-GBaud PDM-256QAM signals in a 50-GHz grid and evaluated the WDM penalties. The resulting spectral efficiency of 600-Gbps/carrier WDM transmissions was as high as 12.02 bit/s/Hz.Keywords
This publication has 8 references indexed in Scilit:
- Low-Complexity Iterative Soft-Demapper for Multidimensional Modulation Based on Bitwise Log Likelihood Ratio and its Demonstration in High Baud-Rate TransmissionJournal of Lightwave Technology, 2018
- Record 560 Gb/s Single-Carrier and 850 Gb/s Dual-Carrier Transmission over Transoceanic DistancesPublished by Optica Publishing Group ,2018
- Single-Carrier 400G PM-256QAM Generation at 34 GBaud Trading off Bandwidth Constraints and Coding OverheadsPublished by Optica Publishing Group ,2017
- DAC-Less 32-GBd PDM-256-QAM Using Low-Power InP IQ Segmented MZMIEEE Photonics Technology Letters, 2016
- 320 Gbit/s, 20 Gsymbol/s 256 QAM coherent transmission over 160 km by using injection-locked local oscillatorOptics Express, 2016
- 256-Gb/s single-carrier PM-256QAM implementation using coordinated DD-LMS and CMA equalizationPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2015
- Experimental demonstration of multi-pilot aided carrier phase estimation for DP-64QAM and DP-256QAMPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2015
- The Challenge for the Next Generation OTN Based on 400Gbps and BeyondPublished by Optica Publishing Group ,2012