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

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