Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers

Dong Mao; Zhiwen He; Yusong Zhang; Yueqing Du; Chao Zeng; Ling Yun; Zhichao Luo; Tijian Li; Zhipei Sun; Jianlin Zhao

doi:10.1038/s41377-022-00713-y

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Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers

Articles

- Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers
- Light: Science & Applications Vol. 11, Issue 2, Pages: 230-241(2022)
- Affiliations：
  
  1.Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, 710129 Xi'an, China
  2.College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, 210046 Nanjing, China
  3.Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices & Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications, South China Normal University, 510006 Guangzhou, China
  4.Department of Electronics and Nanoengineering and QTF Centre of Excellence, Aalto University, Aalto, Finland
- Author bio：
  
  Zhipei Sun (zhipei.sun@aalto.fi)
  Jianlin Zhao (jlzhao@nwpu.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00713-y
  CLC：
- Published：28 February 2022，
  
  Published Online：25 January 2022，
  
  Received：13 August 2021，
  
  Revised：27 December 2021，
  
  Accepted：09 January 2022
- Accepted：
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Mao, D. et al. Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers. Light: Science & Applications, 11, 230-241 (2022).
DOI：

Mao, D. et al. Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers. Light: Science & Applications, 11, 230-241 (2022). DOI： 10.1038/s41377-022-00713-y.

摘要

Abstract

Direct generation of chirp-free solitons without external compression in normal-dispersion fiber lasers is a long-term challenge in ultrafast optics. We demonstrate near-chirp-free solitons with distinct spectral sidebands in normal-dispersion hybrid-structure fiber lasers containing a few meters of polarization-maintaining fiber. The bandwidth and duration of the typical mode-locked pulse are 0.74 nm and 1.95 ps

respectively

giving the time-bandwidth product of 0.41 and confirming the near-chirp-free property. Numerical results and theoretical analyses fully reproduce and interpret the experimental observations

and show that the fiber birefringence

normal-dispersion

and nonlinear effect follow a phase-matching principle

enabling the formation of the near-chirp-free soliton. Specifically

the phase-matching effect confines the spectrum broadened by self-phase modulation and the saturable absorption effect slims the pulse stretched by normal dispersion. Such pulse is termed as birefringence-managed soliton because its two orthogonal-polarized components propagate in an unsymmetrical "X" manner inside the polarization-maintaining fiber

partially compensating the group delay difference induced by the chromatic dispersion and resulting in the self-consistent evolution. The property and formation mechanism of birefringence-managed soliton fundamentally differ from other types of pulses in mode-locked fiber lasers

which will open new research branches in laser physics

soliton mathematics

and their related applications.

关键词

Keywords

references

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