Persistent Link:
http://hdl.handle.net/10150/194281
Title:
Multi-Layer Optical Memory Systems
Author:
Park, Sang-Ki
Issue Date:
2006
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A master and slave servo technique that maintains tracking and focus registration inside a volumetric two-photon disc is presented, and a dynamic test stand with full capability of closed-loop focusing and tracking servo is designed and experimentally demonstrated. The stability of the servo control is experimentally verified. Also, the misregistration of the slave beam with respect to the master beam due to disc tilt and beam skew is calculated.Conventional multiple-layered reflective thin-film systems, which detect reflected light from data layer using focused illumination, are also of interest, because they have higher readout data transfer rate than fluorescent media and more conventional fabrication technology and materials are available. The capacity and performance of a conventional multiple-layered bit-wise optical memory system are affected by several factors, like spherical aberration, layer transmission and inter-layer crosstalk. Characteristics and limitations due to each factor are investigated, and ways to improve capacity are presented. A new technique to analyze inter-layer crosstalk based on Babinet's principle is also presented. The inter-layer crosstalk is calculated for both coherent and incoherent illumination, and results for several combinations of track geometries are compared. Primary results include that the total crosstalk is minimized at certain layer spacings for both coherent and incoherent illumination through optimization of media parameters. The incoherent case shows lower values of total crosstalk and more generous tolerances than the coherent case. A simplified model is also presented to explain the existence of local crosstalk minima.Media satisfying the optimum condition to minimize inter-layer crosstalk are designed by using numerical optimization with merit function and admittance diagram.
Type:
text; Electronic Dissertation
Degree Name:
PhD
Degree Level:
doctoral
Degree Program:
Optical Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Milster, Tom D
Committee Chair:
Milster, Tom D

Full metadata record

DC FieldValue Language
dc.language.isoENen_US
dc.titleMulti-Layer Optical Memory Systemsen_US
dc.creatorPark, Sang-Kien_US
dc.contributor.authorPark, Sang-Kien_US
dc.date.issued2006en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA master and slave servo technique that maintains tracking and focus registration inside a volumetric two-photon disc is presented, and a dynamic test stand with full capability of closed-loop focusing and tracking servo is designed and experimentally demonstrated. The stability of the servo control is experimentally verified. Also, the misregistration of the slave beam with respect to the master beam due to disc tilt and beam skew is calculated.Conventional multiple-layered reflective thin-film systems, which detect reflected light from data layer using focused illumination, are also of interest, because they have higher readout data transfer rate than fluorescent media and more conventional fabrication technology and materials are available. The capacity and performance of a conventional multiple-layered bit-wise optical memory system are affected by several factors, like spherical aberration, layer transmission and inter-layer crosstalk. Characteristics and limitations due to each factor are investigated, and ways to improve capacity are presented. A new technique to analyze inter-layer crosstalk based on Babinet's principle is also presented. The inter-layer crosstalk is calculated for both coherent and incoherent illumination, and results for several combinations of track geometries are compared. Primary results include that the total crosstalk is minimized at certain layer spacings for both coherent and incoherent illumination through optimization of media parameters. The incoherent case shows lower values of total crosstalk and more generous tolerances than the coherent case. A simplified model is also presented to explain the existence of local crosstalk minima.Media satisfying the optimum condition to minimize inter-layer crosstalk are designed by using numerical optimization with merit function and admittance diagram.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
thesis.degree.namePhDen_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorMilster, Tom Den_US
dc.contributor.chairMilster, Tom Den_US
dc.contributor.committeememberSarid, Droren_US
dc.contributor.committeememberSasian, Joseen_US
dc.identifier.proquest1692en_US
dc.identifier.oclc137356762en_US
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