2.01–2.42 $\mu$ m All-Fiber Femtosecond Raman Soliton Generation in a Heavily Germanium Doped Fiber
| Autor: | Tuanjie Du, Bin Xu, Yanhong Li, Kaijie Wang, Huiying Xu, Zhengqian Luo, Zhiping Cai, Valery M. Mashinsky |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Physics::Optics chemistry.chemical_element Pulse duration Germanium 02 engineering and technology Atomic and Molecular Physics and Optics Core (optical fiber) Optical pumping symbols.namesake 020210 optoelectronics & photonics chemistry Femtosecond Dispersion (optics) 0202 electrical engineering electronic engineering information engineering symbols Soliton Electrical and Electronic Engineering Atomic physics Raman spectroscopy |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 25:1-7 |
| ISSN: | 1558-4542 1077-260X |
| DOI: | 10.1109/jstqe.2019.2892328 |
| Popis: | We demonstrated that an all-fiber system generates high-performance mid-infrared Raman solitons in a heavily germanium doped fiber (HGDF). A 10 m-long HGDF with a 12 $\mu$ m core diameter and 64 mol. $\%$ GeO $_{2}$ dopant is designed and pumped by a home-made 1.96 $\mu$ m femtosecond fiber laser in the strong anomalous dispersion region. Stable and single-color Raman solitons are therefore obtained with a continuous wavelength tunability from 2.01 to 2.42 $\mu$ m. The pulse duration of the mid-infrared Raman solitons can be as short as $\sim$ 220 fs. The efficiency of energy transfer to a Raman soliton is about 32.5 $\%$ , while the maximum average power, peak power, and pulse energy are up to 27 mW, 3.6 kW, and $\sim$ 1 nJ, respectively. Different from previous multi-color Raman or supercontinnum-like generation from HGDFs pumped in the near-zero or normal dispersion regime, such pure mid-infrared Raman solitons exhibit excellent stability with a radio-frequency signal-to-noise ratio of $\sim$ 60 dB. This is, to the best of our knowledge, the first demonstration of $>$ 2.4 $\mu$ m stable Raman solitons in an all-fiber system. This work may pave a path towards compact and high-performance mid-infrared femtosecond fiber laser sources. |
| Databáze: | OpenAIRE |
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