共查询到20条相似文献,搜索用时 62 毫秒
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王润轩 《激光与光电子学进展》2003,40(8):37-38,50
介绍了色散管理孤子技术的基本原理、特性,以及应用这一新技术在现有线性光纤网实现超高速、大容量孤子通信的诱人前景。简要综述了当前的研究现状。 相似文献
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论述了色散管理孤子的传输原理,并利用数值方法模拟了色散管理孤子在不同的传输模式中的传输,研究了色散管理孤子特性及其应用。研究结果表明,色散管理孤子具有很明显的周期性,尤其采用平均路径色散为0的模型传输性能更佳。 相似文献
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色散缓变光纤中皮秒孤子传输动力学研究 总被引:1,自引:0,他引:1
用变分原理推导出了色散缓变光纤中皮秒光孤子传输的动力学方程,理论 色散指数缓变光纤中光孤子的传输特性,理论分析与数值模拟一致。 相似文献
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线性色散缓变光纤中孤子传输特性 总被引:1,自引:0,他引:1
运用行波解法求解了色散缓变光纤中的非线性薛定谔方程 ,可以得到近似形式的解析解 ,并得到了孤子振幅、中心位置、相位的演化方程。在此基础上研究了线性色散对孤子振幅、中心位置、相位等传输特性的影响。 相似文献
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We present measurements of the temporal evolution of soliton propagation in a dispersion managed fiber transmission line containing one optical bandpass filter in each map period. The pulses expand and compress in time due to the local dispersion with two minima per map cycle, one in the middle of the anomalous and the other in the middle of the normal section of the fiber map. The pulses are nearly transform limited at the minima with Gaussian-like spectra. A new type of soliton behavior is indicated by the fact that the dynamics, measured bit-error rate (BER), excess gain, and pulse stability do not vary with path-averaged dispersion from 0.02 to 0.08 ps/nm/km 相似文献
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In this paper, we studied the output characteristics of optical soliton in a passively mode-locked ytterbium (Yb)-doped fiber laser by numerical simulation. The structure of the passively mode-locked Yb-doped fiber laser was studied by modeling and analysis. The influence of the inter-cavity average group velocity dispersion on pulse width, pulse peak power and single pulse energy of optical soliton and self-similar pulse was investigated. Simulation results were very instructive for the practical application of the passiavely mode-locked Yb-doped fiber lasers. 相似文献
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Based on an erbium.doped dispersion-managed fiber laser,the characteristics of noise-like pulses under different net cavity group velocity dispersions (GVDs) are experimentally investigated.Results show that the spec-tral bandwidth of noise-like pulse will increase as the net cavity GVD increases and attains maximum when the GVD is slightly positive.The effect of Raman scattering is enhanced due to the temporal width attains minimum.When the net cavity GVD increases continually and further into the positive region, the spectral width begins to decrease and the effect of Raman scattering is suppressed due to the positive dispersion.Our experimental results are in good agreement with the previous prediction of numerical simulation. 相似文献
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Second-order moment analysis of dispersion-managed solitons 总被引:1,自引:0,他引:1
This paper shows how a second-order moment analysis can be used to derive explicit approximate expressions for the evolution of the root-mean-square (rms) width and chirp parameters of a dispersion-managed soliton within one period of the dispersion map. The energy enhancement factor can also be estimated with a good accuracy 相似文献
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We present a linear stability analysis of dispersion-managed (DM) solitons controlled by inline narrow-band filters. We show that the filters can destabilize the pulse if they are unsuitedly located in the dispersion map, which is contrary to the case of standard solitons in fibers with constant dispersion. We also show that for such an instability to take place the pulse energy and the dispersion-map strength should be significantly larger than those usually required for practical long-distance transmission. The filter-induced instability of DM solitons will be an issue in the operation of stretched-pulse mode-locked fiber lasers 相似文献
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Switching-wavelength pulse source constructed from a dispersion-managed SOA fiber ring laser 总被引:1,自引:0,他引:1
K.L. Lee C. Shu 《Photonics Technology Letters, IEEE》2003,15(4):513-515
A new approach to generate switching-wavelength picosecond pulses is developed based on a dispersion-managed semiconductor optical amplifier (SOA) fiber laser cavity. Gain modulation on a 1.55-/spl mu/m SOA is used together with subharmonic gating of pulses in the cavity. An 8-GHz, eight-wavelength output is obtained with a constant spacing of 0.91 nm between neighboring wavelengths. The wavelength channels have nearly identical peak powers. The total amplitude and time jitter of the output is measured to be smaller than 0.4 ps. The spacing and the number of output wavelengths can be easily tuned by changing the operating frequency and the subharmonic ratio without modifying the optical cavity. 相似文献
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Chongjin Xie Karlsson H. Andrekson P.A. Sunnerud H. 《Photonics Technology Letters, IEEE》2001,13(2):121-123
The robustness of dispersion-managed (DM) solitons to polarization-mode dispersion (PMD) is studied by numerical simulations. It is shown clearly that DM solitons are robust to PMD, and generally, DM solitons are more robust to PMD than conventional solitons. The robustness of DM solitons depends on both map strength and average group velocity dispersion (GVD). We show that the larger the map strength and average GVD, the more robust are the DM solitons to PMD, which is due to the increased power of DM solitons with the large map strength and average GVD 相似文献
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The stability of time-domain transmission control of dispersion-managed (DM) solitons is studied. We show by a linear stability analysis that appropriate positioning of synchronous amplitude modulators in the dispersion map can stabilize the propagation of DM solitons without simultaneous use of bandpass filters when the pulse energy is sufficiently large. It is also shown that the frequency chirp of the pulse at the position of the modulator critically affects the stability 相似文献
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Optimization of dispersion-managed optical fiber lines 总被引:1,自引:0,他引:1
Schafer T. Laedke E.W. Gunkel M. Karle C. Posth A. Spatschek K.H. Turitsyn S.K. 《Lightwave Technology, Journal of》2002,20(6):946-952
We present various approaches to the optimization of optical fiber lines and discuss the ranges of validity of such methods. An effective scheme for upgrading of existing transmission lines using dispersion-management with optimization of the pre- and post-compensating fiber is examined. The theory and numerical methods are illustrated in application to the upgrade of a specific installed Deutsche Telekom fiber line 相似文献