Coherent terabit communications with microresonator Kerr frequency combs.

Coherent terabit communications with microresonator Kerr frequency combs.
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DOI:
10.1038/nphoton.2014.57
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发表时间:
2014-05-01
期刊:
影响因子:
35
通讯作者:
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中科院分区:
物理与天体物理1区
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光频梳有可能彻底改变太比特通信。在非线性微谐振器中产生克尔梳是一种特别有前途的选择,能够实现数十GHz的线间距。然而,这样的梳可能表现出强的相位噪声,这使得高速数据传输到目前为止是不可能的。在这里,我们证明了系统的低相位噪声的泵浦条件的调整,使相干数据传输与先进的调制格式,提出了严格的要求的频谱纯度的梳。在第一个实验中,我们编码的数据流为392 Gbit/s的克尔梳使用正交相移键控(QPSK)和16状态正交幅度调制(16 QAM)。第二个实验演示了反馈稳定的梳和传输的1.44 Tbit/s的数据流超过300公里。结果表明,克尔梳满足相干通信的高要求,从而提供了一个有吸引力的解决方案,对芯片级太比特/秒的收发器。
Optical frequency combs have the potential to revolutionize terabit communications. Generation of Kerr combs in nonlinear microresonators represents a particularly promising option enabling line spacings of tens of GHz. However, such combs may exhibit strong phase noise, which has made high-speed data transmission impossible up to now. Here we demonstrate that systematic adjustment of pump conditions for low phase noise enables coherent data transmission with advanced modulation formats that pose stringent requirements on the spectral purity of the comb. In a first experiment, we encode a data stream of 392 Gbit/s on a Kerr comb using quadrature phase shift keying (QPSK) and 16-state quadrature amplitude modulation (16QAM). A second experiment demonstrates feedback-stabilization of the comb and transmission of a 1.44 Tbit/s data stream over up to 300 km. The results show that Kerr combs meet the highly demanding requirements of coherent communications and thus offer an attractive solution towards chip-scale terabit/s transceivers.
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