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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 33 — Nov. 20, 2005
  • pp: 7106–7111

Absorption characteristic and nonvolatile holographic recording in LiNbO3:Cr:Cu crystals

Yuanjun Guo, Liren Liu, Dean Liu, Shaogeng Deng, and Yanan Zhi  »View Author Affiliations


Applied Optics, Vol. 44, Issue 33, pp. 7106-7111 (2005)
http://dx.doi.org/10.1364/AO.44.007106


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Abstract

The absorption characteristic of lithium niobate crystals doped with chromium and copper (Cr and Cu) is investigated. We find that there are two apparent absorption bands for LiNbO3:Cr:Cu crystal doped with 0.14 wt.% Cr2O3 and 0.011 wt.% CuO; one is around 480 nm, and the other is around 660 nm. With a decrease in the doping composition of Cr and an increase in the doping composition of Cu, no apparent absorption band in the shorter wavelength range exists. The higher the doping level of Cr, the larger the absorbance around 660 nm. Although a 633 nm red light is located in the absorption band around 660 nm, the absorption at 633 nm does not help the photorefractive process; i.e., unlike other doubly doped crystals, for example, LiNbO3:Fe:Mn crystal, a nonvolatile holographic recording can be realized by a 633 nm red light as the recording light and a 390 nm UV light as the sensitizing light. For LiNbO3:Cr:Cu crystals, by changing the recording light from a 633 nm red light to a 514 nm green light, sensitizing with a 390 nm UV light and a 488 nm blue light, respectively, a nonvolatile holographic recording can be realized. Doping the appropriate Cr (for example, NCr = 2.795 × 1025m−3 and NCr/NCu = 1) benefits the improvement of holographic recording properties.

© 2005 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(090.2900) Holography : Optical storage materials
(160.5320) Materials : Photorefractive materials
(210.2860) Optical data storage : Holographic and volume memories
(300.1030) Spectroscopy : Absorption

ToC Category:
Holography

History
Original Manuscript: May 16, 2005
Revised Manuscript: July 19, 2005
Manuscript Accepted: July 22, 2005
Published: November 20, 2005

Citation
Yuanjun Guo, Liren Liu, Dean Liu, Shaogeng Deng, and Yanan Zhi, "Absorption characteristic and nonvolatile holographic recording in LiNbO3:Cr:Cu crystals," Appl. Opt. 44, 7106-7111 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-33-7106

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