Abstract

Ring laser and Sagnac interferometer gyroscopes have been suggested for a possible experiment to test metric theories of gravity.¹ As emphasized in recent reviews, neither ring lasara¹ norfiber gyroscopes² seem to provide the required accuracy. The same appears to be true of passive cavity resonators³ or nonlinear variants.⁴ The primary problem with fiber Sagnac interferometers is that the permissibie power before onset of nonlinearities is quite limited (10-100 mW). Thus the SNR possible is also limited. To overcome this limitation we suggest use of a bulk optic device.

© 1986 Optical Society of America