dorsal/arxiv
View SchemaDC response of an interferometer topology with an L-shaped cavity: a tabletop study
| Authors | Junlang Li, Jiehong Huang, Xinyao Guo, Haixing Miao, Yuchao Chen, Xiaoman Huang, Yuan Pan, Chenjie Zhou, Raffaele Flaminio, Jameson Graef Rollins, Bram Slagmolen, Fan Zhang, Teng Zhang, Mengyao Wang |
|---|---|
| Categories | |
| ArXiv ID | 2601.09764vv1 |
| URL | https://arxiv.org/abs/2601.09764 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
A new interferometer topology for kilohertz gravitational-wave detection was recently proposed in [Zhang et al. Phys. Rev. X 13, 021019 (2023)]. The design is based on an L-shaped optical cavity pumped through a Sagnac-like vortex. We report a tabletop experiment that characterizes the interferometer's optical response near DC. When the laser frequency is locked to the resonance of the L-shaped cavity, we observe that the cavity input coupler becomes effectively transparent, yielding a simple Michelson-like response. Moreover, the Sagnac vortex separates into upper and lower paths, which behave as two independent pumping paths driving the cavity. These observations are in agreement with theoretical predictions. Our results provide an intuitive physical picture of this interferometer topology and offer insight into its lock acquisition strategy.
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"abstract": "A new interferometer topology for kilohertz gravitational-wave detection was recently proposed in [Zhang et al. Phys. Rev. X 13, 021019 (2023)]. The design is based on an L-shaped optical cavity pumped through a Sagnac-like vortex. We report a tabletop experiment that characterizes the interferometer\u0027s optical response near DC. When the laser frequency is locked to the resonance of the L-shaped cavity, we observe that the cavity input coupler becomes effectively transparent, yielding a simple Michelson-like response. Moreover, the Sagnac vortex separates into upper and lower paths, which behave as two independent pumping paths driving the cavity. These observations are in agreement with theoretical predictions. Our results provide an intuitive physical picture of this interferometer topology and offer insight into its lock acquisition strategy.",
"arxiv_id": "2601.09764",
"authors": [
"Junlang Li",
"Jiehong Huang",
"Xinyao Guo",
"Haixing Miao",
"Yuchao Chen",
"Xiaoman Huang",
"Yuan Pan",
"Chenjie Zhou",
"Raffaele Flaminio",
"Jameson Graef Rollins",
"Bram Slagmolen",
"Fan Zhang",
"Teng Zhang",
"Mengyao Wang"
],
"categories": [
"physics.ins-det",
"astro-ph.IM",
"gr-qc",
"physics.optics"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "DC response of an interferometer topology with an L-shaped cavity: a tabletop study",
"url": "https://arxiv.org/abs/2601.09764",
"version": "v1"
},
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"variant": "snapshot-2026-01-17",
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