Self-locked operation of large He–Ne ring laser gyroscopes

Holdaway, J.; Hurst, Robert B.; Graham, Richard D.; Rabeendran, Nishanthan; Wells, J.‐P. R.

doi:10.1088/0026-1394/49/3/209

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…This technique is very easy to be implemented, but multi-mode operation can produce a decrease of sensitivity. This technique was successfully applied to the G0 ring operating in Canterbury (NZ) [11], which had an excellent Sagnac signal also in presence of multimode operation. It was however observed that the spectrum of the secondary modes were not stable.…”

Section: Experimental Set-upmentioning

confidence: 99%

Length measurement and stabilization of the diagonals of a square area laser gyroscope

Beverini

Carelli

Virgilio

et al. 2020

Class. Quantum Grav.

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Large frame ring laser gyroscopes are top sensitivity inertial sensors able to measure absolute angular rotation rate below prad/s in few seconds. The GINGER project is aiming at directly measuring the Lense-Thirring effect with an 1% precision on an Earth based experiment. GINGER is based on an array of large frame ring laser gyroscopes. The mechanical design of this apparatus requires a micrometric precision in the construction and the geometry must be stabilized in order to keep constant the scale factor of the instrument. The proposed control is based on square cavities, and relies on the length stabilization of the two diagonals, which must be equal at micrometric level. GP2 is the prototype devoted to the scale factor control test. As a first step, the lengths of the diagonals of the ring cavity have been measured through an interferometric technique with a statistical accuracy of some tens of nanometers, and they have been locked to the wavelength of a reference optical standard. Continuous operation has been obtained over more than 12 hours, without loss of sensitivity. GP2 is located in a laboratory with standard temperature stabilization, with residual fluctuations of the order of 1 • C. Besides the demonstration of the control effectiveness, the analysis of the Sagnac frequency demonstrates that relative small and low-cost ring lasers (around one meter of side) can also achieve a sensitivity of the order of nrad/s in the range 0.01−10 Hz in a standard environment, which is the target sensitivity in many different applications, such as rotational seismology and next generation gravitational waves detectors.

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Section: Experimental Set-upmentioning

confidence: 99%

Length measurement and stabilization of the diagonals of a square area laser gyroscope

Beverini

Carelli

Virgilio

et al. 2020

Class. Quantum Grav.

View full text Add to dashboard Cite

show abstract

Multi-sensor control for precise assembly of optical components

Rong

Sun

2014

Chinese Journal of Aeronautics

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Invited Review Article: Large ring lasers for rotation sensing

Schreiber

Wells

2013

Review of Scientific Instruments

197

171

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Over the last two decades a series of large ring laser gyroscopes have been built having an unparalleled scale factor. These upscaled devices have improved the sensitivity and stability for rotation rate measurements by six orders of magnitude when compared to previous commercial developments. This progress has made possible entirely new applications of ring laser gyroscopes in the fields of geophysics, geodesy, and seismology. Ring lasers are currently the only viable measurement technology, which is directly referenced to the instantaneous rotation axis of the Earth. The sensor technology is rapidly developing. This is evidenced by the first experimentally viable proposals to make terrestrial tests of general relativistic effects such as the frame dragging of the rotating Earth.

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Self-locked operation of large He–Ne ring laser gyroscopes

Cited by 9 publications

References 24 publications

Length measurement and stabilization of the diagonals of a square area laser gyroscope

Length measurement and stabilization of the diagonals of a square area laser gyroscope

Multi-sensor control for precise assembly of optical components

Invited Review Article: Large ring lasers for rotation sensing

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