Multimode Fiber Gyroscopes

We have recently shown [1] that the basic reciprocity requirements [2,3] for sensitive fiber gyros can be met in single mode systems in which the usual polarized light source is replaced by an unpolarized source, and that certain other operational features also result which are of interest. In the present paper we extend the analysis of both polarized and unpolarized gyros to the case of gyros using multimode fibers, and show that there are interesting features in these cases also.