Photorefractive volume holographic memory systems: Approaches, limitations, and requirements

Scott Campbell, Shiuan Huei Lin, Xianmin Yi, Pochi Yeh

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


Volume holographic memory systems provide a compact method by which data can be stored with high density and rapid accessibility. In these systems, for example, wavelength, angle, and phase multiplexing approaches have been utilized for the addressing of data pages. We analyze, in general, practical limitations in such systems due to cross-talk effects, beam depleting and material heating absorption effects, and multiplexing approaches. For example, beam depletion during the writing and reading of holograms in a volume holographic memory will cause the envelope of the diffracted beams to not be rect-like as simple cross-talk theories rely on, and material heating will act to detune, smear, and redirect beams during readout. We also characterize the photon-limited information throughput rates during recall from these systems. Finally, we demonstrate advances in our sparse-wavelength angle-multiplexed volume holographic memory system, achieving the storage of 2, 000 holographic pages, each with ∼ 2.35 million bits each, utilizing 400 angles (over a 3 degree external tuning span) and five wavelengths (over a 56 nanometer span) in a 1.86 cubic centimeter volume of lithium niobate.

Original languageEnglish
Pages (from-to)134-144
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 18 Aug 1995
EventPhotorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications 1995 - San Diego, United States
Duration: 9 Jul 199514 Jul 1995


  • Absorption
  • Beam depletion
  • Bragg detuning
  • Cross-talk
  • Heating
  • Lensing
  • Photon-limited information throughput
  • Prisming
  • Sparse-wavelength angle-multiplexing
  • Volume holographic memory


Dive into the research topics of 'Photorefractive volume holographic memory systems: Approaches, limitations, and requirements'. Together they form a unique fingerprint.

Cite this