Abstract

Substrate birefringence in a magneto-optical disk system is shown to have a predictable effect on the return beam. The irradiance and phase patterns of the return beam at the exit pupil of the objective lens are calculated and experimentally verified for the cases of no substrate birefringence, birefringence aligned with the incident polarization, and birefringence aligned at 45° to the incident polarization. The irradiance at the exit pupil is also calculated (and experimentally verified) for a grooved substrate for various amounts of substrate tilt.

© 1995 Optical Society of America

Effect of surface plasmon excitations on the irradiance pattern of the return beam in optical disk data storage

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Effects of substrate birefringence on focusing and tracking servo signals in magneto-optical disk data storage

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