Characteristics Of Phase-Compensation Techniques In Magnetooptical Read-Back Systems

T. D. Milster

doi:10.1117/12.962907

25 January 1990 Characteristics Of Phase-Compensation Techniques In Magnetooptical Read-Back Systems

T. D. Milster

Proceedings Volume 1166, Polarization Considerations for Optical Systems II; (1990) https://doi.org/10.1117/12.962907
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

Magnetooptical storage systems are designed to obtain high signal-to-noise ratios (SNRs), so that reliable read-back signals are obtained. One characteristic of the optical components in such systems is that they typically introduce a phase shift between the two components of the polarized read-back light. This phase shift reduces the signal amplitude and can increase noise, resulting in reduced SNR. To compensate for the phase shift, and thus restore SNR to the maximum possible value, compensation optics are inserted into the read-back system. This paper discusses various techniques for phase compensation and the characteristics of each technique with respect to alignment and component quality. A Jones calculus model is used to calculate signal and sensitivity to noise currents.

Citation Download Citation

T. D. Milster "Characteristics Of Phase-Compensation Techniques In Magnetooptical Read-Back Systems", Proc. SPIE 1166, Polarization Considerations for Optical Systems II, (25 January 1990); https://doi.org/10.1117/12.962907

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