Sensitivity limit investigation of a Sagnac gyroscope through linear regression analysis

Virgilio, A. Di; Altucci, C.; Bajardi, F; Basti, A.; Beverini, N.; Capozziello, Salvatore; Carelli, Giorgio; Ciampini, Donatella; Fuso, Francesco; Giacomelli, Umberto; Maccioni, Enrico; Marsili, Paolo; Ortolan, A.; Porzio, Alberto; Simonelli, Andreino; Terreni, G.; Velotta, R.

doi:10.1140/epjc/s10052-021-09199-1

Cited by 20 publications

(15 citation statements)

References 61 publications

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“…Non-metricity could have a main role in this discussion due to the fact that the stringent requirement of asking for Equivalence Principle could be relaxed. Forthcoming precision experiments [120], gravitational wave astronomy [121], and precision cosmology observations [31] could be the tools to answer these questions.…”

Section: Discussionmentioning

confidence: 99%

Comparing Equivalent Gravities: common features and differences

Capozziello¹,

Falco²,

Ferrara³

2022

Preprint

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Section: Discussionmentioning

confidence: 99%

Comparing Equivalent Gravities: common features and differences

Capozziello¹,

Falco²,

Ferrara³

2022

Preprint

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“…The RLG interference signal was elaborated following the technique described in detail in Refs. [19][20][21][22]. There, we take into account the laser dynamic and reconstruct the true Sagnac frequency f s (in the following often expressed as the angular Sagnac frequency ω s = 2π f s ).…”

Section: Discussionmentioning

confidence: 99%

Effects of temperature variations in high-sensitivity Sagnac gyroscope

et al. 2021

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GINGERINO is one of the most sensitive Sagnac laser-gyroscopes based on an heterolithic mechanical structure. It is a prototype for GINGER, the laser gyroscopes array proposed to reconstruct the Earth rotation vector and in this way to measure General Relativity effects. Many factors affect the final sensitivity of laser gyroscopes, in particular, when they are used in long-term measurements, slow varying environmental parameters come into play. To understand the role of different terms allows to design more effective mechanical as well as optical layouts, while a proper model of the dynamics affecting long-term (low frequency) signals would increase the effectiveness of the data analysis for improving the overall sensitivity. In this contribution, we focus our concerns on the effects of room temperature and pressure aiming at further improving mechanical design and long-term stability of the apparatus. Our data are compatible with a local orientation changes of the Gran Sasso site below $$\mu $$ μ rad as predicted by geodetic models. This value is consistent with the requirements for GINGER and the installation of an high-sensitivity Sagnac gyroscope oriented at the maximum signal, i.e. along the Earth rotation axes.

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“…Work is currently in progress to improve the mechanical HL design in order to increase the sensor stability. Despite these mechanical shortcomings in GINGERINO, the previous investigations [3,4] indicate that the intrinic noise level is lower than the expected shot noise limit for a RLG [15]. This model does not take the presence of the active medium inside the cavity into account and there is work in progress to improve the theoretical model by the Italian group of GINGER.…”

Section: Introductionmentioning

confidence: 97%

“…At present large scale ring laser gyroscopes (RLGs) are the most sensitive instruments to measure absolute angular rotation rates [1][2][3][4][5][6]. They are based on high finesse square optical cavities where an active medium is present, and two counterpropagating laser beams are generated.…”

Section: Introductionmentioning

confidence: 99%

“…GINGERINO takes advantage of the quiet location inside the Gran Sasso, Italy, underground laboratory. Despite that, the standard deviation of the reconstructed Sagnac frequency of GINGERINO is typically more than 50 times larger than that of G [3,4], mostly due to small mechanical issues, since the composed structure is not yet rigid enough [14]. Work is currently in progress to improve the mechanical HL design in order to increase the sensor stability.…”

Section: Introductionmentioning

confidence: 99%

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Overcoming 1 part in $$10^9$$ of earth angular rotation rate measurement with the G Wettzell data

et al. 2022

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The absolute measurement of the Earth angular rotation rate with ground-based instruments becomes challenging if the 1 part in $$10^9$$ 10 9 of precision has to be obtained. This threshold is important for fundamental physics and for geodesy, to investigate effects of General Relativity and Lorentz violation in the gravity sector and to provide the fast variation of the Earth rotation rate. High sensitivity Ring Laser Gyroscopes (RLG) are currently the only promising technique to achieve this task in the near future, but their precision has been so far limited by systematics related to the laser operation. In this paper we analyze two different sets of observations, each of them three days long. They were obtained from the G ring laser at the Geodetic Observatory Wettzell. The applied method has been developed for the GINGERINO ring laser in order to identify and extract the laser systematics. For the available data sets the residuals show mostly white noise behavior and the Allan deviation drops below 1 part in $$10^9$$ 10 9 after an integration time of about $$10^4$$ 10 4 s.

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Sensitivity limit investigation of a Sagnac gyroscope through linear regression analysis

Cited by 20 publications

References 61 publications

Comparing Equivalent Gravities: common features and differences

Comparing Equivalent Gravities: common features and differences

Effects of temperature variations in high-sensitivity Sagnac gyroscope

Overcoming 1 part in $$10^9$$ of earth angular rotation rate measurement with the G Wettzell data

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