光学
物理
波分复用
调制(音乐)
Sinc函数
超短脉冲
计算机科学
脉冲整形
奈奎斯特-香农抽样定理
波长
激光器
声学
计算机视觉
作者
Fatemeh Alishahi,Ahmad Fallahpour,Amirhossein Mohajerin-Ariaei,Yinwen Cao,Arne Kordts,Martin H. P. Pfeiffer,Maxim Karpov,Ahmed Almaiman,Peicheng Liao,Kaiheng Zou,Cong Liu,Ari N. Willner,Moshe Tur,Tobias J. Kippenberg
出处
期刊:Optics Letters
[The Optical Society]
日期:2019-04-01
卷期号:44 (7): 1852-1852
被引量:10
摘要
Sinc-shaped temporal pulse trains have a spectrally efficient, rectangular Nyquist spectrum. We demonstrate the simultaneous and reconfigurable optical generation of multiple Nyquist-shaped wavelength-division-multiplexed (WDM) channels having temporal sinc-shaped pulse trains as data carriers. The channels are generated through the insertion of coherent lines using cascaded continuous-wave amplitude modulation around the spectral lines of a microresonator-based Kerr optical frequency comb. For each of nine Kerr frequency comb lines, we insert sub-groups of uniform and coherent lines to generate nine WDM channels. The deviations from ideal Nyquist pulses for the nine channels at repetition rates of 6 and 2 GHz are between 4.2%–6.1% and 2%–4.5%, respectively. Each WDM channel is modulated with on–off keying (OOK) at 6 Gbit/s. In addition, we show the reconfigurability of this method by varying the number of WDM channels, the generated sinc-shaped pulse train repetition rates, the duration, and the number of zero-crossings.
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