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arXiv 2111.04074physics.opticsquant-ph
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光纤中时间模复用光场的传输:色散的影响

Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion

Wen Zhao, Nan Huo, Liang Cui, Xiaoying Li, Z. Y. Ou

摘要:

利用两个初始处于同一时间模但通过不同光纤传输时光谱发生变化的干涉场,通过测量时间模的阶数和带宽变化时的四阶干涉,表征了时间模光谱随光纤诱导色散的变化。实验是通过将不同时间模式的脉冲场发射到不平衡马赫-曾德尔干涉仪中来完成的,其中两个臂中的光纤长度不同。结果表明,干涉场的模式失配不仅与非平衡色散量有关,而且与时间模的阶数有关,这反映在干涉场的可见度和干涉图样上。特别地,当两个干扰场的模数是$k\geq2$时,这两个干扰场可以在适度的不平衡色散量下变得正交。此外,我们还讨论了如何通过测量和补偿传输引起的色散来恢复光谱畸变的时间模。我们的研究为进一步研究光纤网络中时间复用量子态的分布奠定了基础。

英文摘要:

Exploiting two interfering fields which are initially in the same temporal mode but with the spectra altered by propagating through different fibers, we characterize how the spectra of temporal modes changes with the fiber induced dispersion by measuring the fourth-order interference when the order number and bandwidth of temporal modes are varied. The experiment is done by launching a pulsed field in different temporal modes into an unbalanced Mach-Zehnder interferometer, in which the fiber lengths in two arms are different. The results show that the mode mismatch of two interfering fields, reflected by the visibility and pattern of interference, is not only dependent upon the amount of unbalanced dispersion but also related to the order number of temporal mode. In particular, the two interfering fields may become orthogonal under a modest amount of unbalanced dispersion when the mode number of the fields is $k\geq2$. Moreover, we discuss how to recover the spectrally distorted temporal mode by measuring and compensating the transmission induced dispersion. Our investigation paves the way for further investigating the distribution of temporally multiplexed quantum states in fiber network.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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