Amplification of rotation velocity using weak measurements in Sagnac's interferometer

TL;DR

This paper presents a novel weak measurement protocol in a Sagnac interferometer to amplify and detect small rotation velocities, with a new optical design to improve sensitivity and reduce instrument size.

Contribution

The study introduces a new weak measurement scheme in a Sagnac interferometer using momentum space probing and proposes an optical design to enhance detection of tiny rotation velocities.

Findings

Demonstrated phase shift amplification for small rotation velocities.

Proposed optical design increases optical path and reduces interferometer size.

Achieved theoretical limits for detection sensitivity.

Abstract

We study the amplification of rotation velocity with the Sagnac interferometer based on the concept of weak-value amplification. By using a different scheme to perform the Sagnac interferometer with the probe in momentum space, we have demonstrated the new weak measure protocol to detect the small rotation velocity by amplifying the phase shift of the Sagnac effect. At the given the maximum incident intensity of the initial spectrum, the detection limit of the intensity of the spectrometer and the accuracy of angular velocity measurement, we can theoretical give the appropriate potselection and the minimum of optical path area before experiment. In addition, we put forward a new optical design to increase the optical path area and decrease the size of the interferometer to overcome the limit of instrument size. Finally, our modified Sagnac's interferometer based on weak measurement is innovative and efficient probing the small rotation velocity signal.