Title :
Estimation of readout signal fluctuation in multi-layer index modulation
Author_Institution :
Adv. Storage Lab., Sony Corp., Atsugi
Abstract :
In micro-reflector optical disc systems, multi-layer index modulation distribution causes wavefront fluctuation in the light beam passing through the recorded layers. Generally, the Marechal´s criterion 0.07lambdarms is widely used as a figure of merit for wavefront quality of a light beam for readout. However, due to the fine structure of the wavefront fluctuation by the recorded marks, the decay of readout signal is less comparing to the general case.
Keywords :
micro-optics; optical disc storage; optical modulation; optical multilayers; reflectivity; Marechal criterion; micro-reflector optical disc system; multilayer index modulation; readout signal fluctuation estimation; wavefront fluctuation; Diffraction; Fluctuations; Glass; Jitter; Laboratories; Material storage; Optical materials; Optical modulation; Optical recording; Servomechanisms;
Conference_Titel :
Optical Data Storage Topical Meeting, 2009. ODS '09.
Conference_Location :
Lake Buena Vista, FL
Print_ISBN :
978-1-4244-3342-1
Electronic_ISBN :
978-1-4244-3343-8
DOI :
10.1109/ODS.2009.5031745
