Analysis of coupling characteristics of square five-core photonic crystal fibers
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摘要: 为了研究基于正方形晶格排列的五芯光子晶体光纤（PCF）的结构参量对耦合特性的影响，根据其5个超模特征，给出计算五芯PCF耦合长度的方法，利用有限元法分析了传输波长以及光纤结构对五芯PCF耦合特性的影响。结果表明，耦合长度随着传播波长的增加而减小，随着孔间距、占空比、纤芯折射率以及纤芯直径的增加而增加。该研究为设计基于五芯PCF的定向耦合器提供了理论依据。Abstract: To study the influence of the structure parameters of a square five-core photonic crystal fiber (PCF) on coupling characteristics, according to the characteristics of its five super-modes, a method to calculate the coupling length of the PCF was given. The effect of the wavelength and the structure parameters on the coupling characteristics of the PCF was numerically studied in detail with the finite element method. The results show that the coupling length increases with the increase of the core-to-core distance, air-filling ratio, core refractive index and core diameter. However, the coupling length decreases with the increase of the wavelength. The results will provide the theoretical foundations for the design of directional couplers based on five-core PCFs.
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Keywords:
- fiber optics /
- coupling length /
- finite element method /
- coupled-mode theory
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[1] SAITOH K, KOSHIBA M. Numerical modeling of photonic crystal fibers[J]. Journal of Lightwave Technology, 2005, 23(11): 3580-3590.
[2] JAN D, LIU M, HE D, et al. Research of photonic crystal fiber with high nonlinear flattened dispersion property[J]. Laser Technology,2013, 37(2):187-190(in Chinese).
[3] LIAO Zh Y, LIU M, QIAN Y, et al. Octagonal dispersion compensation fiber[J]. Laser Technology,2013, 37(4):506-510(in Chinese).
[4] LING F, GAN X S,GU M. Nonlinear optical microscope based on double-clad photonic crystal fibers[J]. Optics Express, 2005, 13(14):5528-5534.
[5] LIMPERT J, SCHREIBER T, NOLTE S, et al. High-power air-clad large-mode-area photonic crystal fiber laser[J]. Optics Express, 2003, 11(7): 818-823.
[6] BERGH R A, KOTLER G, SHAW H J. Single-mode fibre optic directional coupler[J]. Electronics Letters, 1980, 16(7): 260-261.
[7] YANG S. Directional pattern of a cross vector sensor array [J]. The Journal of the Acoustical Society of America, 2012, 131(4): 3484-3489.
[8] WADSWORTH W, PERCIVAL R, BOUWMANS G, et al. High power air-clad photonic crystal fibre laser[J]. Optics Express, 2003, 11(1): 48-53.
[9] LIU M, CHIANG K S. Propagationof ultrashortpulsesin a nonlinear two-core photonic crystal fiber[J]. Applied Physics, 2010, B98(4): 815-820.
[10] LIU M, CHIANG K S. Two-core photonic crystal fiber with zero intermodal dispersion[J]. Optics Communications, 2012,293(15):49-53.
[11] LI D, LIU M, JIAN D, et al.Study on characteristics of highly birefringent dual-core photonic crystal fibers [J].Chinese Journal of Lasers, 2012,39(4):106-110(in Chinese).
[12] LIU M, CHIANG K S. Nonlinear switching of ultrashort pulses in multicore fibers[J]. Quantum Electronics, 2011, 47(12): 1499-1505(in Chinese).
[13] YI Ch Sh, ZHANG P Q,DAI Sh X, et al. Research progress of large-mode area photonic crystal fibers[J].Laser Optoelectronics Progress,2012(10):1-11(in Chinese).
[14] CHEO P K, KING G G, HUO Y. Recent advances in high-power and high-energy multicore fiber lasers[J].Proceedings of the SPIE, 2004,5335:106-115.
[15] FANG X H, CHAI L, HU M L, et al. Numerical analysis for structure optimization of seven-core photonic crystal fibers[J].Acta Physica Sinica,2009,58(4):2495-2500 (in Chinese).
[16] MA L F, LIU M, LI D, et al. A kind of hollow dual-core photonic crystal fiber with zero inter-modal dispersion[J].Chinese Journal of Lasers, 2012, 39(8): 129-134 (in Chinese).
[17] GENG P Ch. Research on seven-core and bandgap Yb-doped photonic crystal fibers.Qinhuangdao:Yanshan University,2010:21-25 (in Chinese).
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