Liao Peicheng, Bao Changjing, Kordts Arne, Karpov Maxim, Pfeiffer Martin H P, Zhang Lin, Cao Yinwen, Almaiman Ahmed, Mohajerin-Ariaei Amirhossein, Tur Moshe, Fejer Martin M, Kippenberg Tobias J, Willner Alan E
Opt Lett. 2017 Aug 15;42(16):3177-3180. doi: 10.1364/OL.42.003177.
We experimentally demonstrate pump-linewidth-tolerant wavelength multicasting using microresonator-based soliton Kerr frequency combs. When Kerr comb lines serve as coherent pumps in a periodically poled lithium niobate waveguide, the linewidth of the multicast signal almost remains that of the original signal at different linewidths of Kerr combs, ranging from 100 kHz to 1 MHz. However, in conventional multicasting where free-running (FR) pumps are used, the linewidth of the converted signal significantly increases. Furthermore, the error vector magnitude (EVM) performance demonstrates eight-fold error-free multicasting of 10 Gbaud 16-quadrature amplitude modulation signals, even when the linewidths of the Kerr combs are as broad as 1 MHz (no Kalman filtering algorithm in the receiver). In contrast, the EVM performance of the signal copy is degraded with an FR laser as a dummy pump.
我们通过基于微谐振器的孤子克尔频率梳，实验证明了对泵浦线宽具有容忍性的波长多播。当克尔梳线用作周期性极化铌酸锂波导中的相干泵浦时，在克尔梳线宽从100kHz到1MHz的不同情况下，多播信号的线宽几乎保持为原始信号的线宽。然而，在使用自由运行（FR）泵浦的传统多播中，转换信号的线宽会显著增加。此外，即使克尔梳的线宽宽至1MHz（接收器中无卡尔曼滤波算法），误差矢量幅度（EVM）性能也展示了10Gbaud 16正交幅度调制信号的八倍无差错多播。相比之下，使用FR激光器作为虚拟泵浦时，信号副本的EVM性能会下降。
