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Proceedings Paper

Holographic fixing with modulated light in two-center holographic recording
Author(s): Yu Zhou; Liren Liu; Dean Liu; Aimin Yan; Ya'nan Zhi
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Paper Abstract

The two-center holographic recording method is a very effective technique to realize nonvolatile photorefractive holographic storage in doubly-doped LiNbO3 crystals, but its main drawbacks are low fixing diffraction efficiency and low recording sensitivity. Commonly homogeneous readout light was used to fixing holographic grating, because the concentration of donor in shallower center had a nearly 180° phase difference to space-charge field at the end of recording phase, a negative photovoltaic field should be created and drive part of electrons come back to its origin position, finally low the fixing space-charge field. In this paper a new fixing method for two-center holographic recording was proposed, and the modulated light with the same optical phase to recording light is used to fix holographic. The new formed photovoltaic field has the same phase with recording light and counteracts with the negative photovoltaic field, finally heavily enhance the fixing space-charge field. Furthermore, the recording sensitivity can be markedly increased with higher intensity ratio of recording light to sensitizing light, at the cost of a little decreasing in fixing space-charge field.

Paper Details

Date Published: 17 September 2007
PDF: 7 pages
Proc. SPIE 6698, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications, 66981K (17 September 2007); doi: 10.1117/12.738766
Show Author Affiliations
Yu Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Dean Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Aimin Yan, Shanghai Institute of Optics and Fine Mechanics (China)
Ya'nan Zhi, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 6698:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications
Ruyan Guo; Shizhuo S. Yin; Francis T.S. Yu, Editor(s)

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