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五氧化二钽（Ta₂O₅）通道波导中的高阶模超连续谱产生

Higher order mode supercontinuum generation in tantalum pentoxide (TaO) channel waveguide.

作者信息

Fan Ranran, Lin Yuan-Yao, Chang Lin, Boes Andreas, Bowers John, Liu Jia-Wei, Lin Chao-Hong, Wang Te-Keng, Qiao Junpeng, Kuo Hao-Chung, Lin Gong-Ru, Shih Min-Hsiung, Hung Yung-Jr, Chiu Yi-Jen, Lee Chao-Kuei

机构信息

Department of Photonics, National Sun Yat-Sen University, 70, Lienhei Road, Kaohsiung, Taiwan.

Center of Crystal Research, National Sun Yat-Sen University, 70, Lienhei Road, Kaohsiung, Taiwan.

出版信息

Sci Rep. 2021 Apr 12;11(1):7978. doi: 10.1038/s41598-021-86922-8.

DOI:10.1038/s41598-021-86922-8
PMID:33846403
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8042067/
Abstract

We fabricated tantalum pentoxide (TaO) channel waveguides and used them to experimentally demonstrate higher-order mode supercontinuum (SC) generation. The TaO waveguide has a high nonlinear refractive index which was in an order magnitude of 10 cm/W and was designed to be anomalously dispersive at the pumping wavelength. To the best of our knowledge, this is the first time a higher-order mode femtosecond pump based broadband SC has been measured from a nonlinear waveguide using the phase-matching method. This enabled us to demonstrate a SC spectrum spanning from 842 to 1462 nm (at - 30 dB), which corresponds to 0.83 octaves, when using the TM waveguide mode. When using the TE mode, the SC bandwidth is slightly reduced for the same excitation peak power. In addition, we theoretically estimated and discussed the possibility of using the broadband higher-order modes emitted from the TaO waveguide for trapping nanoparticles. Hence, we believe that demonstrated TaO waveguide are a promising broadband light source for optical applications such as frequency metrology, Raman spectroscopy, molecular spectroscopy and optical coherence tomography.

摘要

我们制备了五氧化二钽（TaO）通道波导，并利用它们通过实验证明了高阶模超连续谱（SC）的产生。TaO波导具有高非线性折射率，其量级为10⁻⁹ cm²/W，并且被设计为在泵浦波长处呈现反常色散。据我们所知，这是首次使用相位匹配方法从非线性波导中测量基于高阶模飞秒泵浦的宽带超连续谱。这使我们能够证明，当使用TM波导模式时，超连续谱在842至1462 nm（-30 dB）范围内，对应于0.83倍频程。当使用TE模式时，在相同的激发峰值功率下，超连续谱带宽略有减小。此外，我们从理论上估计并讨论了利用TaO波导发射的宽带高阶模捕获纳米颗粒的可能性。因此，我们认为所展示的TaO波导是一种很有前景的宽带光源，可用于诸如频率计量、拉曼光谱、分子光谱和光学相干断层扫描等光学应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/ab2a15b6b6e8/41598_2021_86922_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/58d01c15daa3/41598_2021_86922_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/914ed6cc8133/41598_2021_86922_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/658c03497b32/41598_2021_86922_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/68b077302315/41598_2021_86922_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/07d3f57aa08f/41598_2021_86922_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/4affcb60a2f4/41598_2021_86922_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/60ee7a3a6a21/41598_2021_86922_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/ab2a15b6b6e8/41598_2021_86922_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/58d01c15daa3/41598_2021_86922_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/914ed6cc8133/41598_2021_86922_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/658c03497b32/41598_2021_86922_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/68b077302315/41598_2021_86922_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/07d3f57aa08f/41598_2021_86922_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/4affcb60a2f4/41598_2021_86922_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/60ee7a3a6a21/41598_2021_86922_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/82fb/8042067/ab2a15b6b6e8/41598_2021_86922_Fig8_HTML.jpg

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Exploiting dispersion of higher-order-modes using M-type fiber for application in mid-infrared supercontinuum generation.利用M型光纤的高阶模色散实现中红外超连续谱产生的应用。
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Visible to near-infrared octave spanning supercontinuum generation in tantalum pentoxide (TaO) air-cladding waveguide.
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