Volume 2022 Issue 4
Aug.  2022
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Dong Mao, Zhiwen He, Qun Gao, Chao Zeng, Ling Yun, Yueqing Du, Hua Lu, Zhipei Sun, Jianlin Zhao. 2022: Birefringence-Managed Normal-Dispersion Fiber Laser Delivering Energy-Tunable Chirp-Free Solitons. Ultrafast Science, 2022(4). doi: 10.34133/2022/9760631
Citation: Dong Mao, Zhiwen He, Qun Gao, Chao Zeng, Ling Yun, Yueqing Du, Hua Lu, Zhipei Sun, Jianlin Zhao. 2022: Birefringence-Managed Normal-Dispersion Fiber Laser Delivering Energy-Tunable Chirp-Free Solitons. Ultrafast Science, 2022(4). doi: 10.34133/2022/9760631

Birefringence-Managed Normal-Dispersion Fiber Laser Delivering Energy-Tunable Chirp-Free Solitons

doi: 10.34133/2022/9760631
Funds:

This work was supported by the National Key R&D Program of China (2017YFA0303800), National Natural Science Foundation of China (11874300, 61805277), the Fundamental Research Funds for the Central Universities (3102019JC008), and the Natural Science Foundation of Shaanxi Province (2021JC-09, 2019JQ-447).

  • Received Date: 2022-03-10
  • Rev Recd Date: 2022-07-01
  • Publish Date: 2022-07-31
  • Chirp-free solitons have been mainly achieved with anomalous-dispersion fiber lasers by the balance of dispersive and nonlinear effects, and the single-pulse energy is constrained within a relatively small range. Here, we report a class of chirp-free pulse in normal-dispersion erbium-doped fiber lasers, termed birefringence-managed soliton, in which the birefringence-related phase-matching effect dominates the soliton evolution. Controllable harmonic mode locking from 5 order to 85 order is obtained at the same pump level of ~10 mW with soliton energy fully tunable beyond ten times, which indicates a new birefringence-related soliton energy law, which fundamentally differs from the conventional soliton energy theorem. The unique transformation behavior between birefringence-managed solitons and dissipative solitons is directly visualized via the single-shot spectroscopy. The results demonstrate a novel approach of engineering fiber birefringence to create energy-tunable chirp-free solitons in normal-dispersion regime and open new research directions in fields of optical solitons, ultrafast lasers, and their applications.

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