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Donazzan, Alberto; Naletto, Giampiero; Pelizzo, Maria G.; Cuccato, Davide; Beghi, Alessandro; Ortolan, Antonello; Belfi, Jacopo; Bosi, Filippo; Simonelli, Andrea; Beverini, Nicolò; Carelli, Giorgio; Maccioni, Enrico; Santagata, Rosa; Porzio, Alberto; Tartaglia, Angelo; Di Virgilio, Angela (2016): A network of heterodyne laser interferometers for monitoring and control of large ring-lasers. Interferometry XVIII, San Diego, California, United States, 28. August - 1. September 2016.
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Abstract

The sensitivity achieved by large ring-laser gyroscopes will make it possible to detect faint relativistic effects related to the rotation of the Earths mass. This task requires a strict control of the ring cavity geometry (shape and orientation), which can be performed by a novel network of portable heterodyne interferometers, capable of measuring the absolute distance betweeen two retro-reflectors with a nominal accuracy better than 1nm. First steps have been taken towards the realization of this device and a starting prototype of distance gauge is under development and test