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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 16, Iss. 22 — Nov. 15, 1991
  • pp: 1780–1782

Three-dimensional optical data storage in refractive media by two-photon point excitation

James H. Strickler and Watt W. Webb  »View Author Affiliations


Optics Letters, Vol. 16, Issue 22, pp. 1780-1782 (1991)
http://dx.doi.org/10.1364/OL.16.001780


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Abstract

What is to our knowledge the first high-density (>1012 bits/cm3) optical recording of digital information in a multilayered, three-dimensional format is reported. Information is written as submicrometer volume elements of increased refractive index in a photopolymer by two-photon excitation of a photoinitiator at the waist of a highly focused beam from a colliding-pulse mode-locked laser. Quadratic dependence of two-photon excitation on intensity confines polymerization to the focal volume. Information is read with sufficient axial resolution by differential interference contrast microscopy. This write-once, read-many technique should increase the capacity of the spinning disk format by 100-fold.

© 1991 Optical Society of America

History
Original Manuscript: July 8, 1991
Published: November 15, 1991

Citation
James H. Strickler and Watt W. Webb, "Three-dimensional optical data storage in refractive media by two-photon point excitation," Opt. Lett. 16, 1780-1782 (1991)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-16-22-1780


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References

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