Complex-plane description of differential plane detection in optical data storage

Robert S. Upton; Tomas D. Milster

doi:10.1117/12.327946

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23 October 1998 Complex-plane description of differential plane detection in optical data storage

Robert S. Upton, Tomas D. Milster

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Proceedings Volume 3401, Optical Data Storage '98; (1998) https://doi.org/10.1117/12.327946
Event: Optical Data Storage '98, 1998, Aspen, CO, United States

Abstract

Differential phase detection (DPD) is a method of generating a tracking error signal from rotation of the irradiance pattern formed in the pupil of an optical data storage system. The amount of rotation is related to the distance between the scanning spot and the center of the track being scanned. Media parameters, such as reflectivities of the marks and land and the groove depth affect the DPD signal. The representation of mark and land reflectivity vectors on a complex plane diagram proves to be an elegant technique for designers to optimize a given medium for DPD.

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Robert S. Upton and Tomas D. Milster "Complex-plane description of differential plane detection in optical data storage", Proc. SPIE 3401, Optical Data Storage '98, (23 October 1998); https://doi.org/10.1117/12.327946

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