Dear people of laser science, my understanding of fiber optic gyro is: a single laser beam runs into a cube splitter, then the 2 beams are driven into the opposing ends of a fiber (coil). Then in the fiber they encounter a relative phase shift in case the coil rotates. Finally their interference causes a measurable intensity change that correlates to the speed of rotation.
My "proposal" is to drive the light into one end only of fiber (after the splitter), then on the opposing end couple up the fiber with a phase conjugation mirror.
The beam travels back along the fiber and runs again through the splitter ending up in the detector. Would it improve the system or nothing good comes of it? My theory is that the "time reflected" (phase conjugation mirror) counter-beam may eliminate some error and may extend the length of coil for greater resolution. ?? doubled up phase shift ??