Squeezing-enhancement of optical gyroscopic detection

Priyanka M. Kannath, Ashok Kumar

P. D. Drummond

Xiao-Qi Xiao, Elisha S. Matekole, Jiankang Zhao +3 more

Quantum techniques, developed in recent decades, provide new approaches to achieving high-precision measurements beyond the classical bounds. In this paper, we theoretically demonstrate a metrology method for improving the sensitivity of the interferometric optical gyroscope, robust against the loss, by using coherent-light stimulated two-mode squeezed beams as the light source. The detection protocol is based on a simple intensity measurement, and the quantum noise is far below the shot-noise limit. The enhancement factors for different coherent light fields are analyzed in detail. Additionally, the influence of loss during the propagation in the optical path is studied, and the conditions for achieving sub-shot-noise measurement sensitivity are obtained. We also find that the phase sensitivity of the proposed gyroscope scheme becomes closer to the quantum Cramér-Rao bound with increasing of the photon number of the coherent beams.

Meng Lon Iu, Han Liu, Amr Saher Helmy

With a 1km Sagnac fiber interferometer and a 7.5dB fiber based squeezing source, we reported the first demonstration of squeezing enhanced fiber optical gyroscope with 2.6dB of enhancement of Allan Variance beyond the shot noise.

Thomas Purdy, Pen-Li Yu, Robert W. Peterson +2 more

K. N. Alekseev, Jan Peřina