Noise level of a ring laser gyroscope in the femto-rad/s range
| Title: | Noise level of a ring laser gyroscope in the femto-rad/s range |
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| Authors: | Di Virgilio, Angela D. V., Bajardi, Francesco, Basti, Andrea, Beverini, Nicolò, Carelli, Giorgio, Ciampini, Donatella, Di Somma, Giuseppe, Fuso, Francesco, Maccioni, Enrico, Marsili, Paolo, Ortolan, Antonello, Porzio, Alberto, Vitali, David |
| Source: | Phys. Rev. Lett. 133:013601 (2024) |
| Publication Year: | 2023 |
| Collection: | General Relativity and Quantum Cosmology Physics (Other) Quantum Physics |
| Subject Terms: | Quantum Physics, General Relativity and Quantum Cosmology, Physics - Optics |
| More Details: | Absolute angular rotation rate measurements with sensitivity better than prad/s would be beneficial for fundamental science investigations. On this regard, large frame Earth based ring laser gyroscopes are top instrumentation as far as bandwidth, long--term operation, and sensitivity are concerned. Here, we demonstrate that the GINGERINO active--ring laser upper limiting noise is close to $2 \times 10^{-15}$ rad/s for $\sim 2 \times 10^5$ s of integration time, as estimated by the Allan deviation evaluated in a differential measurement scheme. This is more than a factor 10 better than the theoretical prediction so far accounted for ideal ring lasers shot--noise with the two beams counter--propagating inside the cavity considered as two independent propagating modes. This feature is related to the peculiarity of real ring laser system dynamics that causes phase cross--talking among the two counter--propagating modes. In this context, the independent beam model is, then, not applicable and the measured noise limit falls below the expected one. Comment: 6 pages, 5 figures. To appear in Phys. Rev. Lett. Supplementary material available from the authors |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevLett.133.013601 |
| Access URL: | http://arxiv.org/abs/2301.01386 |
| Accession Number: | edsarx.2301.01386 |
| Database: | arXiv |
| DOI: | 10.1103/PhysRevLett.133.013601 |
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