• Chinese Optics Letters
  • Vol. 20, Issue 9, 090601 (2022)
Qi Wu, Yixiao Zhu*, Ziyu Cheng, Longjie Yin, and Weisheng Hu**
Author Affiliations
  • State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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    DOI: 10.3788/COL202220.090601 Cite this Article Set citation alerts
    Qi Wu, Yixiao Zhu, Ziyu Cheng, Longjie Yin, Weisheng Hu. Spectrally sliced heterodyne coherent receiver with halved electrical bandwidth[J]. Chinese Optics Letters, 2022, 20(9): 090601 Copy Citation Text show less

    Abstract

    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 an intradyne coherent receiver and then validate the principle of the SHCR in a proof-of-concept single-polarization experiment. A 60 GBaud 16-quadrature amplitude modulation transmission is experimentally demonstrated over 80 km standard single-mode fiber with a bit-error-rate of 8.5×10-4 below the 7% hard-decision forward error correction threshold of 3.8×10-3. The SHCR offers a low-cost, hybrid-free, and channel-skew-tolerant candidate for data center interconnects.
    xout[k]=wx1xH[k]x1[k]+wx2xH[k]x2[k]+wy1xH[k]y1[k]+wy2xH[k]y2[k],

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    yout[k]=wx1yH[k]x1[k]+wx2yH[k]x2[k]+wy1yH[k]y1[k]+wy2yH[k]y2[k],

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    skew tolerance=(1/sampling rate)×tap number.

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    Qi Wu, Yixiao Zhu, Ziyu Cheng, Longjie Yin, Weisheng Hu. Spectrally sliced heterodyne coherent receiver with halved electrical bandwidth[J]. Chinese Optics Letters, 2022, 20(9): 090601
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