Multilayer thin-film holographic storage-a new approach
Tóm tắt
Optilink has developed and presented a polarization holographic reading writing system using 1-2 /spl mu/m thick storage layer on a card form media. A storage density of 1.3 bit//spl mu/m/sup 2/ has been achieved without multiplexing with sparse code modulation and Fourier-filtering. Because of the use of a thin storage layer, the volume data density is extremely high in the system. Further enhancement of the areal density up to /spl sim/100 bit//spl mu/m/sup 2/ can be achieved in an improved new polarization holographic system using a multilayer media instead of the thin film. A 6f system for reading with a suitable second spatial filter allows separation of the signal from different layers. This technique combines the advantage of the thin film holography with the idea of the confocal filtering.
Từ khóa
#Nonhomogeneous media #Transistors #Holography #Holographic optical components #Optical filters #Optical films #Optical crosstalk #Apertures #Bit error rate #PolarizationTài liệu tham khảo
10.1117/12.402496
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