The impact of resonator geometry on RLG performances

D. Cuccato, Antonello Ortolan, Alessandro Beghi, A. Saccon

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)


In a Ring laser Gyroscope (RLG) the beat note between the two countepropagating modes of the ring resonator is proportional to the rotation rate. Among inertial rotation sensors, RLGs provide the best performances in sensitivity and accuracy available today. Sensitivity and accuracy of high resolution RLGs are still limited by systematic errors, arising from deformations of resonator geometry, modifications of resonator orientation, and non-linear laser dynamics. The geometry and orientation in space associated to the light beam paths are determined by the position and orientation of the optical elements forming the resonator. To enhance RLG accuracy to the level required by the recently proposed General Relativity tests, the stability of the beams geometry and orientation have to be further improved. To this aim, in high sensitivity RLGs, the optical elements relevant for the beams steering are driven by high precision mechanic handlers, and their relative position is measured by dedicated metrology systems. In this paper we review our progresses on the modelization of square ring resonators geometry. We investigate the ring laser open loop response to mirror displacement by a linear perturbation analysis of our model complemented by numerical simulations. Our findings are relevant for the design and alignment of square ring resonators, and pave the way to the development of multivariable automatic control schemes of square ring cavities.

Original languageEnglish
Title of host publication2016 IEEE Conference on Control Applications, CCA 2016, 19-22 September 2016, Buenos Aires, Argentina
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)978-1-5090-0755-4
ISBN (Print)978-1-5090-0756-1
Publication statusPublished - 10 Oct 2016
Event2016 IEEE Conference on Control Applications, CCA 2016 - Buenos Aires, Argentina, Buenos Aires, Argentina
Duration: 19 Sept 201622 Sept 2016


Conference2016 IEEE Conference on Control Applications, CCA 2016
Abbreviated titleCCA2016
CityBuenos Aires
Internet address


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