Abstract

The performance of a magneto-optic readout system can be degraded by a phase shift between two basic polarization components of a readout beam. One source of this phase shift is undesired birefringence in the substrate of an optical disk. The effect of disk birefringence on the signal-to-noise ratio of a differential magneto-optic readout is evaluated. It is shown that this effect may be represented by two parameters J2 and J3 that depend only on the birefringence and the numerical aperture of a beam illuminating the disk. Previous papers on this subject either presented involved, open-form expressions for the differential magneto-optic readout or assumed that the beam illuminating the disk is collimated. Here simple closed-form formulas are derived by using parameters J2 and J3. The effects of system conditions that can interact with the disk birefringence, such as an imbalance between the differential data detectors, are also considered.

© 1992 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (62)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription