Fluctuations in optical birefringence signal in hard-driving polarization modulation measurements

The paper presents theoretical investigation of accuracy of estimating stationary birefringence of transparent objects in experiments with polarization modulation of test radiation and differential suppression of excess noises. Analytical relations for the spectrum of birefringence signal fluctuations have been derived. The signal-to-noise ratio dependences on both the properties of samples under study and measuring equipment characteristics have been analyzed. The results have been compared with earlier experiments.