White light micrograting multiplexing for high density data storage

Jame J. Yang, Michael R. Wang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Recording of multiplexed microholographic gratings with improved recording volume for high density optical data storage is proposed and demonstrated. By using a hybrid diffractive-refractive objective lens with extended depth of focus, we have achieved a recording beam size of approximately 1 μm and a focal depth of 20 μm. Multiple gratings corresponding to spectral lines within the 400-650 μm spectral band have been successfully multiplexed in a single recording spot or pit of size 1.25 μm on a DuPont photopolymer film using a white light source along with narrowband niters or dispersion elements, thus demonstrating the storage of multiple bits in a single pit. Simultaneous readout of multiple bits in a single storage pit is accomplished with a microspectrometer-type readout head using a white light source.

Original languageEnglish (US)
Pages (from-to)1304-1306
Number of pages3
JournalOptics Letters
Issue number9
StatePublished - May 1 2006

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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