Spectrally sliced heterodyne coherent receiver with halved electrical bandwidth

A spectrally-sliced heterodyne coherent receiver (SHCR) employing four balanced photodetectors and analog-to-digital converters with half of the signal bandwidth is proposed to complete the signal reception and field recovery. We first numerically characterize the performance of SHCR compared with intradyne coherent receiver and then validate the principle of the SHCR in a proof-of-concept single-polarization experiment. 60 GBaud 16-quadrature amplitude modulation transmission is experimentally demonstrated over 80 km standard single-mode fiber with a biterror-rate of 8.5×10 below the 7% hard-decision forward error correction threshold of 3.8×10. The SHCR offers a low-cost, hybrid-free and channel-skew-tolerant candidate for data-center interconnects.

[1]  Xi Chen,et al.  882 Gbps Transmission over 100 km of SSMF using a Self-Calibrated Single-ended Coherent Receiver , 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

[2]  L. Oxenløwe,et al.  Chip-based optical frequency combs for high-capacity optical communications , 2021, Nanophotonics.

[3]  Weibiao Chen,et al.  Digital-analog hybrid optical phase-lock loop for optical quadrature phase-shift keying , 2020 .

[4]  Chuanbowen Sun,et al.  Carrier-assisted differential detection , 2020, Light: Science & Applications.

[5]  J. Yu,et al.  The reduction of the LO number for heterodyne coherent detection. , 2012, Optics express.

[6]  Jianjun Yu,et al.  Simplified coherent receiver with heterodyne detection of eight-channel 50 Gb/s PDM-QPSK WDM signal after 1040 km SMF-28 transmission. , 2012, Optics letters.

[7]  Peter J. Winzer,et al.  Colorless coherent receiver using 3×3 coupler hybrids and single-ended detection , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[8]  Linjie Zhou,et al.  Real-time full-field arbitrary optical waveform measurement , 2010 .

[9]  Jianjun Yu,et al.  A novel DSP algorithm for improving the performance of digital coherent receiver using single-ended photo detection , 2008, 2008 34th European Conference on Optical Communication.

[10]  K. Kikuchi,et al.  Evaluation of Sensitivity of the Digital Coherent Receiver , 2008, Journal of Lightwave Technology.

[11]  Seb J Savory,et al.  Digital filters for coherent optical receivers. , 2008, Optics express.

[12]  K. Kikuchi,et al.  Coherent demodulation of 40-Gbit/s polarization-multiplexed QPSK signals with 16-GHz spacing after 200-km transmission , 2005, OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..

[13]  Chongjin Xie,et al.  Intra-data center interconnects, networking, and architectures , 2020 .

[14]  Kazuro Kikuchi,et al.  Fundamentals of Coherent Optical Fiber Communications , 2016, Journal of Lightwave Technology.