Reconfigurable optical generation of nine Nyquist WDM channels with sinc-shaped temporal pulse trains using a single microresonator-based Kerr frequency comb

Fatemeh Alishahi*, Ahmad Fallahpour, Amirhossein Mohajerin-Ariaei, Yinwen Cao, Arne Kordts, Martin Hubert Peter Pfeiffer, Maxim Karpov, Ahmed Almaiman, Peicheng Liao, Kaiheng Zou, Cong Liu, Ari N. Willner, Moshe Tur, Tobias J. Kippenberg, Alan E. Willner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)1852-1855
Number of pages4
JournalOptics Letters
Volume44
Issue number7
DOIs
StatePublished - 1 Apr 2019

Funding

FundersFunder number
Office of Naval ResearchN00014-16-1-2813
Air Force Office of Scientific ResearchFA9550-15-1-0166
Office of the Assistant Secretary for Research and Technology

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