Modal Birefringence Dependent Supercontinuum Due to Cross-Phase Modulation in a Dispersion-Flattened/Decreasing Fiber
Modal Birefringence Dependent Supercontinuum Due to Cross-Phase Modulation in a Dispersion-Flattened/Decreasing Fiber
复制标题
色散平坦/递减光纤中交叉相位调制导致的模态双折射相关超连续谱
DOI：
10.1007/s10043-002-0089-x
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Y. Imai
中科院分区：
文献类型：
--
作者：
H. Sone;T. Arai;M. Imai;Y. Imai
数值分析表明，脉宽为3.5ps、峰值功率为2.3W的交叉相位调制孤子脉冲通过2.4km长的色散平坦/渐减光纤（DFDF）传输时，可产生比中心最大强度低20 dB的320 nm宽的平坦光谱。通过在主轴上激发两个正交偏振模，实现了中心波长为1.55 μm的交叉相位调制（XPM）。当双折射光纤的模式双折射小于时，由于孤子捕获，正交脉冲之间的波矢失配可以忽略不计。|诺克诺|= 10 - 6。从时间和光谱两个方面讨论了模式双折射对超连续谱产生的影响。
It was found by numerical analysis that a 320 nm wide and flat spectrum at 20 dB less than the central maximum intensity is generated from cross-phase modulated soliton pulses with 3.5 ps pulse width and 2.3 W peak power, which are propagated through a 2.4km length of dispersion-flattened/decreasing fiber (DFDF). The cross-phase modulation (XPM) at a central wavelength of 1.55 μm is achieved by exciting two orthogonally polarized modes into the principal axes. The wave-vector mismatch between the orthogonal pulses can be neglected because of soliton trapping when the modal birefringence of the DFDF is less than |nox-n0y| = 10−6. The effect of modal birefringence on supercontinuum generation is discussed in temporal and spectral regimes by numerical analysis.