共查询到19条相似文献,搜索用时 109 毫秒
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一种基于光纤光栅传输色散特性的可调谐色散补偿方案 总被引:7,自引:6,他引:1
分析了光纤光栅在禁带附近的光特性,提出了一种基于光纤光栅传输色散特性和应用变特性的新的色散补偿方案-级联光纤光栅可调谐色散补偿;从理论和实验两方面分析了它的色散补偿的可调谐性,并进行了数值模拟;讨论了这种方案在光纤通信方面特别在密集波分复用系统中的应用前景。 相似文献
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用于色散补偿的非线性啁啾光纤光栅 总被引:1,自引:0,他引:1
提出了采用可调谐的非线性啁啾光纤光栅来补偿光通信系统中动态的非线性色散。分析了非线性啁啾光纤光栅的光谱及时延特性 ,并对其进行了数值仿真。设计了二类 PZT制作非啁啾光纤光栅的方案 相似文献
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The transmission of ultrashort optical pulses over long distances in optical fibers is limited by pulse broadening due to group velocity dispersion. A grating and telescope dispersion compensator with group velocity dispersion of equal magnitude and opposite sign can compensate for the fiber dispersion. The possible benefits of such dispersion compensation in the 1.3-1.6-μm wavelength region are investigated. The results show that compensation of first-order dispersion at 1.55 μm in a fiber with zero dispersion near 1.3 μm is primarily limited by the second-order dispersion of the grating and the telescope compensator. For a wavelength slightly greater than the zero dispersion wavelength, both the first- and second-order group velocity dispersion can be canceled by the grating and telescope dispersion compensator, allowing transmission exceeding 100 Gb/s over 100 km 相似文献
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本文将全面分析Chirped Bragg光纤光栅的色散特性,并对色散特性作一定性分析,利用耦合模方程导出ChirpedBragg光栅的反射率方程,从而推导出Chirped Bragg光纤光栅的色散计算公式,然后,引入微波领域的“品质因素”概念,从而量化了色散补偿器的补偿能力。 相似文献
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Litchinitser N.M. Eggleton B.J. Patterson D.B. 《Lightwave Technology, Journal of》1997,15(8):1303-1313
We propose a transmission-based dispersion compensator employing an apodized, unchirped fiber Bragg grating (FBG). A theoretical model for dispersion compensation in transmission based on the dispersive properties of the periodic structure is developed. A figure of merit is defined for optimization of the grating parameters for maximum recompression of dispersion-broadened optical pulses in long-haul communication systems. Numerical examples confirm that nearly perfect compensation with very low insertion losses can be achieved for many practical cases of interest 相似文献
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Lee Y. J. Bae J. Lee K. Jeong J.-M. Lee S. B. 《Photonics Technology Letters, IEEE》2007,19(10):762-764
We propose a tunable dispersion and dispersion slope compensator based on induced strain-chirp in a uniform fiber Bragg grating. A specially designed mechanical rotator concatenated with a metal beam with linear thickness variation along its height was used to induce a quadratic strain gradient along the grating. We successfully demonstrated the dispersion and dispersion slope change by adjusting the rotation angle and feasibility of dispersion and dispersion slope compensation at 160-Gb/s nonreturn-to-zero transmission by simulation 相似文献
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文章提出一种基于磁场变化对均匀周期光纤光栅(FBG)引入线性啁啾的特性来实现可调整偏振模色散(PMD)补偿的技术。这种全光型PMD补偿技术在实现调整的同时能保持中心波长固定不变,而且能够灵活方便地实现不同的微分群时延量(DGD)。针对10Gbit/s非归fig(NRZ)传输系统,采用这种技术对进行PMD补偿的模拟计算结果表明,接收信号的眼图在补偿后得到了显著改善。 相似文献
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Multiwavelength chirped fiber Bragg grating (MCFBG) is a more valuable approach to chromatic dispersion compensation. And adjusting the structure of FBG will optimize the performance of dispersion compensator in 8×10 Gb/s DWDM network, which is proved by simulating calculation. 相似文献
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为实现高速光纤通信系统中的偏振模色散(PMD)补偿,提出了基于高双折射线性啁啾光纤光栅(Hi-BiLCFBG)的线性应变梯度悬臂梁作为PMD补偿器,同时考虑到波分复用(WDM)系统中不同信道PMD值不同,提出了取样啁啾(CSP)与周期啁啾(CGP)的等效,利用带有CSP的高双折射取样光纤光栅(Hi-Bi SFBG)制成多信道PMD补偿器,不同信道等效的啁啾系数不同,从而可同时实现多个信道的PMD补偿。实验中,实现了40Gb/s的传输系统中最大58.6 ps的差分群时延(DGD)补偿,补偿后,信号眼图张开度有明显改善,从而证明了该PMD补偿器的有效性与可行性。 相似文献
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Goh C.S. Set S.Y. Taira K. Khijwania S.K. Kikuchi K. 《Photonics Technology Letters, IEEE》2002,14(5):663-665
In this letter, we demonstrate an adjustable dispersion slope compensator for waveform distortion compensation based on a nonlinearly strain-chirped fiber Bragg grating. The dispersion slope of the device can be tuned up to -18.9 ps/nm2 with a bandwidth >2.4 nm. After transmission through a 120-km-long dispersion-shifted fiber, the resulting waveform distortion for a 2.65-ps pulse is successfully compensated by using this device 相似文献