| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Modified Raman Response Model and Supercontinuum Generation in Flat Dispersion Photonic Crystal Fiber with Two-Zero Dispersion Wavelengths |
| WANG He-Lin1, YANG Ai-Jun1**, LENG Yu-Xin2, WANG Cheng2
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1College of Science, Zhejiang University of Technology, Hangzhou 310023
2State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
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| Cite this article: |
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WANG He-Lin, YANG Ai-Jun, LENG Yu-Xin et al 2011 Chin. Phys. Lett. 28 034206 |
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Abstract The generation mechanisms of supercontinuum (SC) and the effect of the modified Raman model on SC are further analyzed in a flat dispersion photonic crystal fiber (PCF) with two-zero dispersion wavelengths (TZDWs) by introducing an accurate Raman response function in the scalar nonlinear Schrödinger equation. The results show that the introduction of Boson peak in the modified Raman gain model not only results in much rapider broadening of SC but also promotes more pump pulse energy transferred to the short wavelength region, which is related to stimulated Raman scattering. Moreover, SC generated from the PCF splits into two spectral bands, and their spectral peaks rapidly separate and broaden with the increase of incident power. Double-band central wavelengths are finally located at about 850 nm and 1220 nm. The pumping energy depletion phenomenon occurs. The simulated results from the modified Raman model are in better agreement with the experimental results than that from the single-Lorentzian model.
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| Keywords:
42.65.Tg
42.65.Re
42.65.Sf
42.81.Dp
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Received: 08 December 2010
Published: 28 February 2011
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| PACS: |
42.65.Tg
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(Optical solitons; nonlinear guided waves)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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42.81.Dp
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(Propagation, scattering, and losses; solitons)
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