| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Generation of mid-infrared supercontinuum by designing circular photonic crystal fiber |
| Ying Huang(黄颖)1, Hua Yang(杨华)1,2,†, and Yucheng Mao(毛雨澄)1 |
1 College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China;
2 State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China |
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Abstract A circular photonic crystal fiber (C-PCF) based on As2Se3 is designed, which has three zero dispersion wavelengths and flat dispersion. Using this fiber, a wide mid-infrared supercontinuum (MIR-SC) can be generated by launching a femtosecond pulse in the first anomalous dispersion region. The simulation results show that the MIR-SC is formed by soliton self-frequency shift and direct soliton spectrum tunneling on the long wavelength side and self-phase modulation, soliton fission on the short wavelength side. Further, optical shocking and four-wave mixing (FWM) are not conducive to the long-wavelength extension of MIR-SC, while the number and intensity of fundamental solitons have a greater effect on the short-wavelength extension of MIR-SC. The generation of optical shocking waves, FWM waves and fundamental solitons can be obviously affected by changing the fiber length and input pulse parameters, so that the spectrum range and flatness can be adjusted with great freedom. Finally, under the conditions of 4000 W pulse peak power, 30 fs pulse width, 47 mm fiber length, and 0 initial chirp, a wide MIR-SC with a coverage range of 2.535 μm-16.6 μm is obtained. These numerical results are encouraging because they demonstrate that the spread of MIR-SC towards the red and blue ends can be manipulated by choosing the appropriate incident pulse and designing optimized fiber parameters, which contributes to applications in such diverse areas as spectroscopy, metrology and tomography.
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Received: 10 June 2021
Revised: 08 September 2021
Accepted manuscript online:
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.81.-i
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(Fiber optics)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No.61275137) and the Opened Fund of the State Key Laboratory of Integrated Optoelectronics (Grant 054211-8 Chin.Phys.B 31,054211(2022) No.IOSKL2020KF20). |
Corresponding Authors:
Hua Yang,E-mail:huayang@hnu.edu.cn
E-mail: huayang@hnu.edu.cn
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| About author: 2021-9-16 |
Cite this article:
Ying Huang(黄颖), Hua Yang(杨华), and Yucheng Mao(毛雨澄) Generation of mid-infrared supercontinuum by designing circular photonic crystal fiber 2022 Chin. Phys. B 31 054211
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