| Dispersion flattened photonic crystal fiber with high nonlinearity for supercontinuum generation at 1.55 μm |
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| 引用本文： | 郑龙,张霞,任晓敏,马会芳,施雷,王亚苗,黄永清.Dispersion flattened photonic crystal fiber with high nonlinearity for supercontinuum generation at 1.55 μm[J].Chinese Optics Letters,2011(4):13-17. |
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| 作者姓名： | 郑龙 张霞 任晓敏 马会芳 施雷 王亚苗 黄永清 |
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| 作者单位： | Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Institute of Optical Communications and Optoelectronics,Beijing University of Posts and Telecommunications |
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| 基金项目： | supported by the National "973" Program of China (No. 2010CB327605);the National Natural Science Foundation of China (No. 61077049);the Program for New Century Excellent Talents in the University of China (No. NCET-08-0736);the Chinese Universities Scientific Fund (No. BUPT2009RC0410);the National 111 Project of China (No. B07005) |
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| 摘 要： | A robust design for a photonic crystal fiber (PCF) based on pure silica with small normal dispersion and high nonlinear coefficient for its dual concentric core structure is presented.This design is suitable for flat broadband supercontinuum (SC) generation in the 1.55-μm region.The numerical results show that the nonlinear coefficient of the proposed eight-ring PCF is 33.8 W -1 ·km -1 at 1550 nm.Ultraflat dispersion with a value between -1.65 and -0.335 ps/(nm·km) is obtained ranging from 1375 to 1625 nm.The 3-dB bandwidth of the SC is 125 nm (1496–1621 nm),with a fiber length of 80 m and a corresponding input peak power of 43.8 W.The amplitude noise is considered to be related to SC generation.For practical fabrication,the influence of the random imperfections of airhole diameters on dispersion and nonlinearity is discussed to verify the robustness of our design.
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| 关 键 词： | 非线性系数 光子晶体光纤 色散平坦 超连续 计算结果 峰值功率 纤维长度 振幅噪声 |
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