Synchronous detection of randomly phase-modulated interferograms is examined for the cases of low and high SNR. Long-average phase estimates exhibit (time × bandwidth)-1 dependence and give useful results with low SNR and σφ < π. Optimum averaging times are determined for phase tracking in the case of relatively high SNR.
© 1981 Optical Society of America
G. J. M. Aitken, J. Gay, and A. Journet, "Synchronous detection of randomly phase-modulated interferograms," Appl. Opt. 20, 330-334 (1981)