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We introduce a signal processing approach to compensate for the timing jitter produced by the acoustic effect in soliton communications. The other main sources of timing jitter, the Gordon-Haus effect and the polarization effect, are inherently stochastic. By contrast, the acoustic effect is deterministic and becomes the dominant source of bit error rates in standard soliton systems when the bit rates are more than 10 Gb/s and the transmission distance is more than several thousand kilometers. We exploit the deterministic nature of the acoustic effect to introduce a scheme that predicts the amount of timing jitter as a function of the previous transmitted bits and uses the information to adjust the sampling period of the received soliton pulses. We demonstrate successful application of the scheme by simulations and discuss implementation issues 相似文献
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为了研究锁模光纤激光器中矢量孤子的动力学特征,利用非线性偏振旋转锁模机制,实验获得了矢量孤子及矢量孤子簇。矢量孤子簇表现出来的动力学特点与抽运功率与偏振设置有关。抽运功率越高,由矢量孤子裂变所形成的矢量孤子簇对数越多。而且,孤子簇脉冲序列在时域上显示出强度周期调制现象。实验中观察到强度周期调制的4阶和7阶脉冲矢量孤子簇。结果表明,强度周期调制的矢量孤子簇输出是非线性偏振旋转锁模光纤激光器偏振调制的本征属性,孤子簇周期强度调制现象归因于腔内偏振相关隔离器对孤子簇的周期偏振调制的结果。 相似文献
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An edge detecting scheme for coded mark inversion (CMI) line codes which can reject wrong slot errors is proposed. This scheme looks at data transitions over one-and-a-half symbol durations and makes a binary decision based on the most likely transition pattern. An analysis and measurement results for the bit-error-rate performance of this scheme over an optical fiber link which show improvements in the detector tolerance against symbol timing jitters are presented 相似文献
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The influence of stochastic high-order perturbations on soliton transmission system is studied by self-companying operator method. Arrival time jitters variation induced by stochastic third-order dispersion is approximately proportional to three powers of transmission distance, that by stochastic nonlinear dispersion and self-steeping are approximately proportional to the transmission distance. 相似文献
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The excitation of radial and torsional-radial acoustic modes by solitons is analyzed depending on light polarization. The theoretical study of the timing jitter and bit error rate caused by the acoustic effect in soliton communication lines for co- and counter-polarized adjacent bits is presented. The influence of guiding filter on the acoustically induced timing jitter is calculated 相似文献
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本文通过微扰理论,对采用滑频滤波器控制的孤子系统的时间抖动进行了研究。结果表明,滑频滤波器的引入,导致幅度和频率、幅度和滑频滤波器三阶项间的耦合,使得孤子传输系统的时间抖动增大,影响系统的传输极限。研究了滑频滤波器三阶项对滑频速率的影响,讨论和比较了具有滑频滤波器、固定频率滤波器和不加任何控制时的系统对由放大器的ASE噪声产生的时间抖动的抑制结果。采用滑频滤波器是一种较好地抑制时间抖动的方法。 相似文献
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Ming Xu Xueming Liu Ju Cai Xianglin Yang Yu Hu 《Journal of Infrared, Millimeter and Terahertz Waves》2001,22(9):1361-1369
In this paper, the three allocated schemes of dispersion-managed soliton are proposed on standard single-mode fiber. Adopting variational method and on the proposed schemes, the timing jitter introduced from the perturbations of amplifier spontaneous-emission (ASE) and cross-phase modulation in wavelength-division multiplexing is studied. Compared with performances of different system schemes, the principles of optimal allocated dispersion management are obtained, which can be used to optimal allocated dispersion managed soliton system. 相似文献
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色散随机变化对暗孤子传输系统时间抖动的影响及抑制 总被引:1,自引:0,他引:1
运用守恒量扰动法,研究了色散随机变化对暗孤子传输系统的影响。结果表明:色散随机变化增大了暗孤子到达检测窗口的时间抖动方差而降低了暗孤子传输系统的容量。引入非线性增益可以有效地抑制色散随机变化对暗孤子到达时间抖动的影响。 相似文献
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色散控制孤子系统中光纤偏振模色散的滤波控制 总被引:1,自引:0,他引:1
本文研究高速OTDM色散控制孤子系统偏振模色散的影响及其滤波控制.首先建立了同时考虑偏振模色散和滤波控制时的DMS传输方程,其次采用变分法给出了滤波控制常双折射光纤中DMS传输方程的变分解,求得了DMS的特征参数的传输演化规律,然后研究了滤波控制随机双折射光纤中DMS传输稳定性问题及其定时抖动规律.最后基于变分所得定时抖动公式,分析了三种不同系统的定时抖动,显示了DMS系统中用滤波器抑制PMD时,对高速光孤子通信性能的影响是非常有效的. 相似文献
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Arahira S. Takahashi H. Nakamura K. Yaegashi H. Ogawa Y. 《Quantum Electronics, IEEE Journal of》2009,45(5):476-487
We proposed and demonstrated all-optical clock recovery system using a monolithic mode-locked laser diode (MLLD) that operated with less sensitivity to the polarization and the wavelength of the input data signals also with no bandpass filter to eliminate the input signal-components. The keys to this new technique are the MLLD integrated with a tensile-strained quantum-well saturable absorber and a new polarization-diversity setup by signal input orthogonally polarized to the lasing polarization of the MLLD. This approach was experimentally validated in the 40 Gbps clock recovery experiments. The results exhibited excellent performance of the clock recovery with low timing jitters (<0.3 ps) remaining small dependence on the wavelength and the polarization of the input data signals and input-signal suppression less than -30 dB with no use of the bandpass filter. We also succeeded in the stable clock recovery for the input of polarization-scrambled data signals. 相似文献
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Wavelength tunable two-colored femtosecond (fs) soliton pulse generation is proposed and demonstrated for the first time, using passively mode-locked fs fiber laser and polarization maintaining fibers. The wavelengths of the two soliton pulses can be changed arbitrarily by varying the power and polarization direction of the fiber-input pulse. Ideal two colored soliton pulses in which the pulsewidths are about 200 fs are generated in the wavelength region of 1.56-1.70 μm for 110-m fiber. The generated pulses are almost transform-limited ones 相似文献
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Yushu Liu Shaowu Zhang Hong Li 《Journal of Infrared, Millimeter and Terahertz Waves》2000,21(5):845-852
Property of soliton propagation is analyzed by using self-companying operator method in multiple-core fiber of ring structure. The results show that the time jitters of soliton transmission in every core relate to the relative amplitude among the input solitons in the multiple-core fiber. 相似文献
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Optical phase conjugation is used to improve soliton communication system cascaded by distributed erbium-doped fibers. The results show that if its periodic length is chosen properly, optical phase conjugation can reduce the radiated energy and the time jitters, postpone the widening of soliton pulse width, also improve the stability of the soliton system. 相似文献
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The model of stochastic refractive index variation is built in dark soliton transmission system, its influence is studied on time jitters. The results show: the stochastic variation apparently leads to the time jitters in arrival, and reduces the stability and the capacity of the transmission system. 相似文献
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Hong Li Yushu Liu Shaowu Zhang 《Journal of Infrared, Millimeter and Terahertz Waves》2000,21(5):837-844
Soliton propagation in fiber with randomly varying birefringence is studied by using self-companying operator method. It is shown that randomly varying birefringence leads to time jitters increasing with transmission distance, and disrupts the stability of soliton transmission. The fluctuation of time jitters is stochastic, and nonlinear gain is introduced to remove the influence. 相似文献
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Property of soliton propagation is analyzed by using self-companying operator method in every core of multiple-core fiber. The results show that the time jitters of soliton transmission in every core relate to the relative phase among the input solitons in multiple-core fiber. 相似文献
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Yushu Liu 《Journal of Infrared, Millimeter and Terahertz Waves》1999,20(8):1541-1548
Stability of soliton propagation with third-order dispersion is analyzed by using self-companying operator method. The results show : third-order dispersion leads to time jitters in arrival, and disrupts the stability of soliton transmission. Enhancing the strength of filter can effectively suppress the influence. 相似文献