Experimental demonstration of response-enhanced fiber Sagnac gyroscopy via imaginary weak-value amplification
Abstract
We experimentally demonstrate a 100-m long fiber Sagnac gyroscope employing imaginary weak-value amplification (IWVA) to enhance the optical readout response to rotation. A Sagnac-induced polarization phase is converted into a measurable spectral response through polarization post-selection and spectrally resolved detection. By varying the post-selection angle, we characterize the gyroscope response over the experimentally accessible rotation-rate range. The response increases systematically toward orthogonal post-selection, yielding a maximum experimental enhancement of approximately 13 times relative to a fixed reference configuration without postselection. Fast Fourier transform and Allan-deviation measurements further characterize the noise and stability of the gyroscope. Near-orthogonal post-selection reduces the equivalent rotation-rate fluctuations, with the minimum Allan deviation decreasing from 0.06 rad/s for the reference configuration to 0.0091 rad/s for the configuration exhibiting the maximum response enhancement, corresponding to an approximately 6.6-fold reduction. Low-frequency fluctuations of the broadband superluminescent diode source limit the long-term stability. These results demonstrate that IWVA provides a practical approach for response-enhanced fiber-based Sagnac gyroscopy and precision rotation sensing.
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BibTeX
@misc{huang2026experimental,
title = {{Experimental demonstration of response-enhanced fiber Sagnac gyroscopy via imaginary weak-value amplification}},
author = {Jing-Hui Huang and Hong-Liang Cui and Tianying Chang and Jing Zhang and TianYe Huang and Xiang-Yun Hu},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00481},
eprint = {2611.00481},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00481},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Experimental demonstration of response-enhanced fiber Sagnac gyroscopy via imaginary weak-value amplification
AU - Jing-Hui Huang
AU - Hong-Liang Cui
AU - Tianying Chang
AU - Jing Zhang
AU - TianYe Huang
AU - Xiang-Yun Hu
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00481
UR - https://arxiv.org/abs/2611.00481
AB - We experimentally demonstrate a 100-m long fiber Sagnac gyroscope employing imaginary weak-value amplification (IWVA) to enhance the optical readout response to rotation. A Sagnac-induced polarization phase is converted into a measurable spectral response through polarization post-selection and spectrally resolved detection. By varying the post-selection angle, we characterize the gyroscope response over the experimentally accessible rotation-rate range. The response increases systematically toward orthogonal post-selection, yielding a maximum experimental enhancement of approximately 13 times relative to a fixed reference configuration without postselection. Fast Fourier transform and Allan-deviation measurements further characterize the noise and stability of the gyroscope. Near-orthogonal post-selection reduces the equivalent rotation-rate fluctuations, with the minimum Allan deviation decreasing from 0.06 rad/s for the reference configuration to 0.0091 rad/s for the configuration exhibiting the maximum response enhancement, corresponding to an approximately 6.6-fold reduction. Low-frequency fluctuations of the broadband superluminescent diode source limit the long-term stability. These results demonstrate that IWVA provides a practical approach for response-enhanced fiber-based Sagnac gyroscopy and precision rotation sensing.
ER -