Open AccessReconfigurable optical generation of nine Nyquist WDM channels with sinc-shaped temporal pulse trains using a single microresonator-based Kerr frequency comb
Author(s) -
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
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.001852
Subject(s) - sinc function , optics , wavelength division multiplexing , nyquist–shannon sampling theorem , pulse (music) , frequency comb , physics , pulse shaping , ultrashort pulse , telecommunications , computer science , laser , wavelength , computer vision , detector
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.