Enhancement of vacuum-ultraviolet dispersive-wave emission using gas-filled tapered hollow-core fibers
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910059203657728 |
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| author | Zhao, Yinuo Liu, Donghan Shi, Baoqi Huang, Zhiyuan Chen, Tiandao Pan, Jinyu Liu, Zhengzheng Zeng, Xinglin He, Wenbin Huang, Jiapeng Zhan, Jinxin Jiang, Xin Leng, Yuxin Liu, Junqiu Pang, Meng |
| author_facet | Zhao, Yinuo Liu, Donghan Shi, Baoqi Huang, Zhiyuan Chen, Tiandao Pan, Jinyu Liu, Zhengzheng Zeng, Xinglin He, Wenbin Huang, Jiapeng Zhan, Jinxin Jiang, Xin Leng, Yuxin Liu, Junqiu Pang, Meng |
| contents | The recent breakthroughs in laser-driving 229Th nuclear transition have created an urgent demand for coherent vacuum-ultraviolet (VUV) sources delivering high spectral brightness at the critical 148.38 nm isomer energy. However, generating sufficient photon flux to overcome the low nuclear excitation probability remains a challenge for compact setups. While resonant dispersive wave emission in gas-filled hollow-core fibers offers a promising route, standard capillaries face a fundamental trade-off: maximizing input coupling requires large core diameters, whereas efficient nonlinear VUV conversion demands the high intensities using small cores. Here, we resolve this conflict using a gas-filled tapered capillary fiber. This architecture utilizes a longitudinally decreasing core diameter to combine a large input aperture with adiabatic field concentration, thereby continuously enhancing the nonlinear interaction. Experimentally, we demonstrate a widely tunable source (135-240 nm) that achieves a twofold efficiency enhancement specifically at the 148.38 nm wavelength compared to uniform geometries. By providing a scalable route to high-flux VUV generation, this work establishes a critical tabletop tool for advancing solid-state nuclear clocks and time-resolved spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_18366 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Enhancement of vacuum-ultraviolet dispersive-wave emission using gas-filled tapered hollow-core fibers Zhao, Yinuo Liu, Donghan Shi, Baoqi Huang, Zhiyuan Chen, Tiandao Pan, Jinyu Liu, Zhengzheng Zeng, Xinglin He, Wenbin Huang, Jiapeng Zhan, Jinxin Jiang, Xin Leng, Yuxin Liu, Junqiu Pang, Meng Optics The recent breakthroughs in laser-driving 229Th nuclear transition have created an urgent demand for coherent vacuum-ultraviolet (VUV) sources delivering high spectral brightness at the critical 148.38 nm isomer energy. However, generating sufficient photon flux to overcome the low nuclear excitation probability remains a challenge for compact setups. While resonant dispersive wave emission in gas-filled hollow-core fibers offers a promising route, standard capillaries face a fundamental trade-off: maximizing input coupling requires large core diameters, whereas efficient nonlinear VUV conversion demands the high intensities using small cores. Here, we resolve this conflict using a gas-filled tapered capillary fiber. This architecture utilizes a longitudinally decreasing core diameter to combine a large input aperture with adiabatic field concentration, thereby continuously enhancing the nonlinear interaction. Experimentally, we demonstrate a widely tunable source (135-240 nm) that achieves a twofold efficiency enhancement specifically at the 148.38 nm wavelength compared to uniform geometries. By providing a scalable route to high-flux VUV generation, this work establishes a critical tabletop tool for advancing solid-state nuclear clocks and time-resolved spectroscopy. |
| title | Enhancement of vacuum-ultraviolet dispersive-wave emission using gas-filled tapered hollow-core fibers |
| topic | Optics |
| url | https://arxiv.org/abs/2603.18366 |