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Passively harmonic dissipative soliton generation in normal dispersion erbium-doped fiber laser using SMS fiber as artificial saturable absorber

Chen Y 1 , Tiu ZC 2 , Tan SJ 3 , Dimyati K 4 , Harun SW 5

Affiliations 

  • 1 Chongqing Vocational Institute of Engineering, No.1, North and South Avenue, Binjiang New City, Jiangjin District, Chongqing, 402260, China
  • 2 Centre for Sustainable Engineering Solutions, INTI International University, 71800, Nilai, Negeri Sembilan, Malaysia. ziancheak.tiu@newinti.edu.my
  • 3 Faculty of Engineering, UOW Malaysia KDU University College, 40150, Shah Alam, Selangor, Malaysia
  • 4 Photonics Engineering Laboratory, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
  • 5 Photonics Engineering Laboratory, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia. swharun@um.edu.my
Sci Rep, 2024 Jul 02;14(1):15134.
PMID: 38956191 DOI: 10.1038/s41598-024-66111-z

Abstract

Passively harmonic mode-locking has been experimentally demonstrated in an erbium-doped fiber laser with large normal dispersion using single-multi-single mode structure as artificial saturable absorber. By increasing the pump power under the same polarization setting, the mode-locking operation can switch from fundamental mode-locked to 5th order harmonic mode-locked. Highest repetition rate of 4.26 MHz (5th order harmonic) is observed, with pulse width and pulse energy ascertained at 290 fs and 3.0 nJ, respectively. Excellent signal-to-noise ratio (SNR) of above 50 dB is observed for all harmonic orders. The findings validated that SMS structure can be used to generate stable and switchable high order of harmonic mode-locked. The low-cost SMS fiber for harmonic mode-locked generation technique could lay the groundwork for future sustainable industrial growth.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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