Tunable insertion of multiple lines into a Kerr frequency comb using electro-optical modulators

Changjing Bao*, Peicheng Liao, Arne Kordts, Maxim Karpov, Martin H.P. Pfeiffer, Lin Zhang, Yinwen Cao, Guodong Xie, Cong Liu, Yan Yan, Ahmed Almaiman, Amirhossein Mohajerin-Ariaei, Ahmad Fallahpour, Moshe Tur, Tobias J. Kippenberg, Alan E. Willner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We experimentally insert a flexible number of electro-optical (EO) comb lines into a Kerr frequency comb via EO modulation and demonstrate the use of combined Kerr and EO combs as light sources in coherent communications. The number of EO lines inserted into the Kerr comb can be varied by changing the modulation frequency. Additionally, the inserted EO comb is found to have similar coherence to that of the Kerr comb, as indicated by their linewidths. The high coherence of both the Kerr and EO combs has further been demonstrated in a communication experiment in which the comb lines are encoded with 10 Gbaud quadrature phase-shift-keyed signals. The increased number of comb lines after EO modulation indicates the possibility of obtaining more data channels in optical communications.

Original languageEnglish
Pages (from-to)3765-3768
Number of pages4
JournalOptics Letters
Issue number19
StatePublished - 1 Oct 2017


FundersFunder number
Defense Security Cooperation AgencyDSCA-4440644029
Futurewei/Huawei Technologies
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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