Title :
Integrated Optical Unit Design for the Collinear Holographic Storage System
Author_Institution :
Dept. of Mech. Eng., Nat. Chung-Hsing Univ., Taichung
Abstract :
The optical configuration proposed by Optware Corporation has the features of recording the holographic versatile disk (HVD) and backwardly retrieving CD and DVD. This paper presents a novel design that applies the technology of integrated optical unit to the HVD system. This unit comprises a holographic optical element for splitting light and generating servo signal. A transmissive spatial light modulator (SLM) with central data part and outer-ring reference part is adopted for modulating the laser beams. A new outer-ring polarizer is accompanied with the SLM. Two lasers, one with 532 nm for the HVD and the other with 650 nm for the CD/DVD, are included in the unit. Analysis for the system was performed. Simulation results show the feasibility for implementing an integrated collinear holographic system with miniaturized size
Keywords :
digital versatile discs; holographic storage; optical modulation; CD; DVD; HVD; collinear holographic storage system; holographic versatile disk; integrated optical unit design; laser beams; outer-ring polarizer; transmissive spatial light modulator; CD recording; DVD; Disk recording; Holographic optical components; Holography; Integrated optics; Optical design; Optical modulation; Optical recording; Signal generators; Collinear holography; holographic optical element (HOE); holographic versatile disk (HVD); integrated optical unit; optical pickup head;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.888530
