Direct and low-loss connection between a hollow-core optical fiber and a dispersion compensating fiber for dispersion-free delivery of short optical pulses in hollow-core fiber
Direct and low-loss connection between a hollow-core optical fiber and a dispersion compensating fiber for dispersion-free delivery of short optical pulses in hollow-core fiber
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空心光纤和色散补偿光纤之间的直接低损耗连接，用于在空心光纤中无色散传输短光脉冲
DOI：
10.1117/12.2648720
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Zhong A
中科院分区：
文献类型：
--
作者：
Zhong A
空芯光纤（HCF）由于具有低延迟、低非线性和温度不敏感等优点而受到广泛的研究兴趣。双嵌套反谐振无节点光纤（DNANF）的最新进展表明，光纤损耗仅为0.174 dB/km。超短、高峰值功率脉冲的传输可以极大地受益于HCF的低非线性。然而，在低损耗传输区域中，HCF（诸如DNANF）中的波导色散通常为2-3 ps/（nm·km），仍然导致不需要的脉冲展宽。在这里，我们展示了HCF和色散补偿光纤（DCF）之间的低损耗互连，能够获得具有零净色散的HCF+DCF链路。为了使DCF的模场直径（4.9μm）与HCF的模场直径相适应，我们首先在DCF上拼接一小段梯度折射率（GRIN）多模光纤。然后将GRIN光纤抛光到特定长度，以获得最佳MFD适应我们的HCF，这是一种嵌套的反谐振无节点光纤（NANF），在1550 nm处具有26.3μm MFD。我们获得了整个DCF-GRIN-NANF组件的仅0.55 dB的损耗。通过在模场适配器端面上沉积抗反射涂层，互连损耗可以进一步降低到0.39 dB。
Hollow-core fibers (HCFs) have been under intense research interest thanks to their many advantages including low latency, low nonlinearity, and temperature insensitivity. The most recent progress on the double nested antiresonant nodeless fiber (DNANF) demonstrated fiber losses of only 0.174 dB/km. Transmission of ultra-short, high-peak-power pulses can greatly benefit from low nonlinearity of HCFs. However, the waveguide dispersion in HCFs such as DNANF is typically 2-3 ps/(nm·km) in the low-loss transmission region, still causing unwanted pulses broadening. Here, we demonstrate a low-loss interconnection between HCF and a dispersion-compensating fiber (DCF), enabling to obtain HCF+DCF link with zero-net dispersion. To adapt the relatively small mode-filed diameter (MFD) of DCF (4.9μm) to the MFD of the HCF, we first splice a short segment of graded-index (GRIN) multi-mode fiber on the DCF. The GRIN fiber is then polished to a specific length to obtain an optimal MFD adaptation to our HCF, which was a nested antiresonant nodeless fiber (NANF) with 26.3μm MFD at 1550 nm. We obtained a loss of only 0.55 dB for the whole DCF-GRIN-NANF component. By depositing an anti-reflective coating on the mode-field adapter end-face, the interconnection loss can be further reduced to 0.39 dB.
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DOI：
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2005
期刊：
Conference on Lasers and Electro-Optics
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DOI：
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发表时间：
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期刊：
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DOI：
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发表时间：
2022
期刊：
Conference on Lasers and Electro-Optics
影响因子：
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作者：
Ailing Zhong;D. Dousek;D. Suslov;S. Zvánovec;E. N. Fokoua;F. Poletti;D. Richardson;R. Slavík;M. Komanec
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