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Suppression of Soliton Timing Jitters in Fibers with random birefringence by Periodical Polarization Modulation

Semiconductor Photonics and Technology 2006年第4期12卷 224-227,237页

作者： CHEN Wei-cheng XU Wen-cheng Department of Physics Foshan University Foshan 528000 CHN Laboratory of Photonic Information Technology School of Information and Photoelectric Science and Engineering South China Normal University Gnangzhon 510006 CHN

Periodical polarization modulation scheme is proposed to suppress timing jitters induced by frequency fluctuations between two polarization components of solitons. In periodical polarization modulation scheme, the polarization states of the soliton are modulated to excite equally for suppressing timing jitters induced by two unequal polarization components in the soliton trapping. Moreover, polarization modulation can weaken the effect of random birefringence on the soliton pulses in each relay distance. The numerical result shows that the soliton timing jitters are suppressed by our proposed method.

关键词： Timing jitter random birefringence Polarization modulation Soliton

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Modulation instabilities in randomly birefringent two-mode optical fibers

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Chinese Physics B 2016年第12期25卷 283-293页

作者：李金花任海东裴世鑫曹兆楼咸冯林 School of Physics and Optoelectronic Engineering Nanjing University of Information Science and Technology (NUIST) Nanjing 210044 China Sunnypol Optoelectronics Company Limited Hefei 231135 China

Modulation instabilities in the randomly birefringent two-mode optical fibers （RB-TMFs） are analyzed in detail by accounting the effects of the differential mode group delay （DMGD） and group velocity dispersion （GVD） ratio between the two modes, both of which are absent in the randomly birefringent single-mode optical fibers （RB-SMFs）. New MI characteristics are found in both normal and anomalous dispersion regimes. For the normal dispersion, without DMGD, no MI exists. With DMGD, a completely new MI band is generated as long as the total power is smaller than a critical total power value, named by Per, which increases significantly with the increment of DMGD, and reduces dramatically as GVD ratio and power ratio between the two modes increases. For the anomalous dispersion, there is one MI band without DMGD. In the presence of DMGD, the MI gain is reduced generally. On the other hand, there also exists a critical total power （Per）, which increases （decreases） distinctly with the increment of DMGD （GVD ratio of the two modes） but varies complicatedly with the power ratio between the two modes. Two MI bands are present for total power smaller than Per, and the dominant band can be switched between the low and high frequency bands by adjusting the power ratio between the two modes. The M1 analysis in this paper is verified by numerical simulation.

关键词： modulation instability Manakov equations two-mode optical fibers random birefringence

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