Non-volatile holographic storage in doubly-doped photorefractive

Details Non-volatile holographic storage in doubly-doped photorefractive Non-volatile holographic storage in doubly-doped photorefractive

1999-02-25

2000-12-05

Henry, Jon

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 3, 365117, 365125, 365216, 430 1, 430 2, G03H 102, G03H 104, G11C 1122

Patent

active

061574708

ABSTRACT:
A non-volatile holographic recording method and system based on a doubly-doped photorefractive material. One embodiment of the holographic material is doped to have first and second types of dopants that are operable to produce charge carriers to a common band in response to radiation of a specified wavelengths. Charge carriers in the common band can migrate to a different spatial location. The dopants are also capable of recombining with charge carriers in the common band. The first type of dopants have a first dopant energy level below the band by a first energy gap greater than a second energy gap of a second dopant energy level of the second type of dopants below the common band. The first and second dopant energy levels are separated from each other so that their absorption bands to the common band are substantially separated. In addition, the first and second energy gaps should be much greater than the thermal energy k.sub.B T associated with the operating temperature T in order to substantially reduce or minimize the probability of thermal excitation of charge carriers.

REFERENCES:
patent: 3799642 (1974-03-01), Phillips et al.
patent: 5440669 (1995-08-01), Rakuljic et al.
patent: 5460907 (1995-10-01), Ducharme et al.
patent: 5648856 (1997-07-01), Stoll
patent: 5665493 (1997-09-01), Bai et al.
patent: 5684611 (1997-11-01), Rakuljic et al.
patent: 5698344 (1997-12-01), Bai et al.
patent: 5699175 (1997-12-01), Wilde
patent: 5739929 (1998-04-01), Macfarlane
patent: 5864412 (1999-01-01), Wilde
"Holographic Storage In Electrooptic Crystals. I. Steady State", N. V. Kukhtarev, et al., Ferroelectrics, 1979, vol. 22, pp. 949-960.
"Two-color holography in reduced near-stoichiometric lithium niobate", Harald Guenther, et al., 1998 Optical Society of America, vol. 37, No. 32 pp. 7611-7623.

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