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Frontiers of Optoelectronics

Front Optoelec Chin    2009, Vol. 2 Issue (3) : 293-298     DOI: 10.1007/s12200-009-0013-0
RESEARCH ARTICLE |
Tapered photonic crystal fiber for supercontinuum generation in telecommunication windows
Yongzhao XU1(), Zhixin CHEN2, Hongtao LI1, Yanfen WEI3
1. Department of Electronic Engineering, Dongguan University of Technology, Dongguan 523808, China; 2. School of Information, Central University of Finance and Economics, Beijing 100081, China; 3. Tianjin Mobile Communications Corporation, Tianjin 300021, China
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Abstract

We numerically studied supercontinuum generation in a tapered photonic crystal fiber with flattened dispersion properties. The fiber was weakly tapered to have normal dispersion at wavelengths around 1.55 μm after a certain distance. We pumped 4 ps pulses with low peak power and found that flatly broadened, wideband supercontinuum was generated in telecommunication windows. Furthermore, we also demonstrated the effects of tapered length and pulse width of the pump pulse on supercontinuum generation.

Keywords fiber optics      photonic crystal fiber      dispersion      supercontinuum     
Corresponding Authors: XU Yongzhao,Email:xuyongzhao@gmail.com   
Issue Date: 05 September 2009
 Cite this article:   
Yongzhao XU,Zhixin CHEN,Hongtao LI, et al. Tapered photonic crystal fiber for supercontinuum generation in telecommunication windows[J]. Front Optoelec Chin, 2009, 2(3): 293-298.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-009-0013-0
http://journal.hep.com.cn/foe/EN/Y2009/V2/I3/293
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Yongzhao XU
Zhixin CHEN
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Yanfen WEI
Fig.1  Chromatic dispersion profiles of tapered PCF with air-hole pitch Λ decreasing from 2.6 to 2.4 μm
Fig.2  Chromatic dispersion at wavelength of 1.55 μm versus air-hole pitch Λ
Fig.3  Dispersion coefficients /(ps·km), /(10ps·km), /(10ps·km), and /(10ps·km) versus air-hole pitch Λ
Fig.4  SC generated from tapered PCF
Fig.5  Evolution of pump pulse along fiber. (a) Temporal evolution; (b) evolution of 30-dB spectrum width along propagation distance, where dot line indicates the distance of
Fig.6  Spectral evolution in vicinity of
Fig.7  Minimum effective peak powers of pump pulses for generating flat wideband SC versus tapered length of PCF
Fig.8  Generated SCs for different input pulse width
Fig.9  30-dB spectrum width and effective peak power of pump pulses versus fiber loss
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