Single-shot dynamics of dual-comb generation in a polarization-multiplexing fiber laser

Alberto Rodriguez Cuevas*, Igor Kudelin, Hani Kbashi, Sergey Sergeyev

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Dual optical frequency combs have been a recurrent case of study over the last decade due to their wide use in a variety of metrology applications. Utilizing a single cavity laser to generate a dual comb reduces system complexity and facilitates suppression of common noise. However, a dual-comb regime in single cavity lasers tends to be more unstable and difficult to achieve. Therefore, having a better understanding about the way they are generated could improve and automate their generation and control. In this paper, we investigate the build-up dynamics and collision of dual comb in a polarization-multiplexing ring-cavity fiber laser using DFT (Dispersive Fourier Transform) method. We observe a bunch of meta-stable short-lived mode-locking states before the laser entered the dual-comb mode-locking state. The energy level of this short-lived initial pulses determines its evolution. If it decreases too much, the pulse will eventually collapse while if it stays above certain level, it will be successfully generated. The results presented in this paper increase the understanding of dual-comb generation inside a single cavity laser and may contribute in future attempts to increase the stabilization of this regime.
Original languageEnglish
Article number19673
JournalScientific Reports
Issue number1
Publication statusPublished - 11 Nov 2023

Bibliographical note

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit

Funding: EPSRC EP/W002868/1; European Union’s grants Horizon 2020 ETN MEFISTA Grant number 861152; Royal Academy of Engineering Grant number IF2223B-133


Dive into the research topics of 'Single-shot dynamics of dual-comb generation in a polarization-multiplexing fiber laser'. Together they form a unique fingerprint.

Cite this