Broadband synchronization of ultrafast pulse generation with double-walled carbon nanotubes

Jiancheng Zheng, Diao Li*, Peng Liu, Xiaoqi Cui, Bin Zhang, Wei Geng, Qiang Zhang, Zhenyu Xu, Esko I. Kauppinen, Zhipei Sun*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Double-walled carbon nanotubes have shown competitive properties in broadband optical pulse generation owning to the intrinsic electronic properties. Synchronization of ultrafast optical pulses in multiple wavelengths is a key technique for numerous applications, such as nonlinear frequency conversion, ultrafast pump-probe, coherent Raman scattering spectroscopy, coherent optical synthesis, etc. In this work, we demonstrate the mode-locking and synchronization of 1.55 μm pulses with 1 μm and 1.9 μm pulses via a single saturable absorber based on double-walled carbon nanotubes. The large optical nonlinearity and broadband optical absorption in the double-walled carbon nanotubes enable independent and synchronized mode-locking in >900 nm bandwidth. In addition, we present a creative concept to realize multi-wavelength synchronization from a single laser system. Our results demonstrate a straightforward and feasible approach towards pulse synchronization over ultra-broad bandwidth with flexible wavelength selection in the near-infrared region.

Original languageEnglish
Pages (from-to)3397–3407
Number of pages11
Issue number17
Publication statusPublished - 2 Aug 2023
MoE publication typeA1 Journal article-refereed


  • double-walled carbon nanotube
  • fiber laser
  • mode-locking
  • synchronization


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