Accounting for microbends in determining induced birefringence in a ring fiber-optic resonator

It is proposed to take into account the microbends of an optical fiber in order to find the induced birefringence in a ring resonator. It is shown that, due to the small bending radius at the coupling regions, the contribution from these regions to the total change in the optical length is comparable with the contribution of the main part of the resonator contour.