• Holographic Data Storage at 2+ Tbit/in2
    • Author: Mark Ayres, Ken Anderson, Fred Askham, Brad Sissom, Adam Urness
    • Download: Paper Presentation


  • Holographic Data Storage: Science Fiction or Science Fact?
  • Progress in Second Generation Holographic Data Storage
  • Homodyne Detection of Holographic Memory Systems
    • Authors: Adam Urness, Mark  Ayres, William Wilson, Robert McLeod
    • Download: Paper Presentation


  • Multi-terabyte holographic data storage demonstrator PDF
    • Authors: Mark Ayres, Ken Anderson, Fred Askham, Bradley Sissom
    • Abstract: Holographic data storage (HDS) is transitioning to second-generation technologies in order to meet the demands of big data. Akonia Holographics is developing an advanced HDS demonstrator platform featuring a high NA recording geometry, novel multiplexing methods, and coherent channel techniques to meet these challenges.


  • High speed holographic data storage at 500 Gbit/in.2  PDF
    • Authors: Ken Anderson, Edeline Fotheringham, Adrian Hill, Bradley Sissom, and Kevin Curtis
    • Abstract: A holographic system is presented, along with experimental results that demonstrate data densities of 500 Gbit/in.2 with a write user rate of 23 MBytes/s and a read user rate of 13 MBytes/s.
  • Image oversampling for page-oriented optical data storage AO  PDF
    • Authors: Mark Ayres, Alan Hoskins, and Kevin Curtis
    • Abstract: Page-oriented data storage systems incorporate optical detector arrays [such as complementary metaloxide semiconductor (CMOS) arrays] in order to read data images. For laboratory demonstrations the detector array is typically pixel matched to the data image [Opt. Lett. 22, 1509 (1997)]. This approach requires exceedingly high-performance optics and mechanics for the simultaneous alignment of each data-bearing pixel image to a detector element to be achieved. Systems intended for commercialization are designed with detector arrays that spatially sample the image at or above the Nyquist rate in order to read poorly aligned and distorted images [S. Redfield, Holographic Data Storage (Springer-Verlag, 2000), pp. 347;349]. However, for data page sizes exceeding a megapixel this approach becomes prohibitive in terms of detector bandwidth, size, power, cost, and processing requirements. We have instead developed a sub-Nyquist oversampling methodology that can recover arbitrarily aligned and distorted megapixel data page images with pixel-matched fidelity by using fewer than double the number of detector pixels. Features required for practicable implementation are described, including fiducials for alignment determination. © 2006 Optical Society of America
  • Consumer Holographic ROM Reader with Mastering and Replication Technology  PDF
    • Authors: Ernest Chuang, Kevin Curtis, Yunping Yang, and Adrian Hill
    • Abstract:A novel holographic ROM design allows a compact low-cost consumer drive with lensless readout in a 10mm drive height. A two-step mastering method enables high-efficiency holographic masters for fast replication using planewave illuminations.
  • How to Write Good Books  PDF
    • Authors: Ken Anderson, Edeline Fotheringham, Sam Weaver, Brad Sissom, Kevin Curtis
    • Abstract: We introduce two novel techniques enabling media-efficient recording allowing for more pages per book and decreasing the disk space needed by each book. We present explanations and experimental results including our latest density results.


  • Polytopic multiplexing  PDF
    • Authors: Ken Anderson and Kevin Curtis
    • Abstract: Polytopic multiplexing is a new method of overlapping holograms that, when combined with other multiplexing techniques, can increase the capacity of a volume holographic data storage system by more than a factor of 10. This is because the method makes possible the effective utilization of thick media. An experimental demonstration of this technique is also presented; 2004 Optical Society of America.


  • Recording media that exhibit high dynamic range for digital holographic data storage
    • Authors: Lisa Dhar, Arturo Hale, Howard E. Katz, Marcia L. Schilling, Melinda G. Schnoes, and Fred C. Schilling
    • Abstract: A general strategy for fabricating thick, optically flat photopolymer recording media with high dynamic range (M/#) that exhibit low levels of recording-induced Bragg detuning for holographic data storage is presented. In particular, media with M/# values as high as 42 in 1-mm-thick formats are obtained.  We believe that these results are the first demonstration of holographic storage medium with a dynamic range of this magnitude. In addition, we report the holographic recording and recovery of high capacity (480-kbit) digital data pages in these media, further illustrating their data-storage capabilities; 1999 Optical Society of America