Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1992-10-30
1995-06-06
Ben, Loha
Optical: systems and elements
Holographic system or element
Having particular recording medium
359569, 430 2, 378 70, G03N 102, G02B 518
Patent
active
054227453
ABSTRACT:
A fast process for photowriting a permanent, high efficiency optical grating comprises darkening glass by irradiation and photobleaching the darkened glass by exposing the glass to interfering writing laser beams, thereby forming the grating.
REFERENCES:
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patent: 4728165 (1986-03-01), Powell et al.
Vorozheikina et al. Hologram Recording in Irradiated KBr Crystals By a La Beam, Sov. Tech. Phys. Lett. 5(9), Sep. 1979 pp. 473-474.
Ascheulov et al., Activated Photochromic Glass As Three Dimensional Holographic Media, Opt. & Spectrosc., vol. 30, No. 6, Jun. 1971 pp. 612-614.
Durville et al., "Laser-induced refractive-index gratings in Eu-doped glasses", Physical Rev. B 34 (6) 4213-20 (Sep. 15, 1986).
Behrens et al., "Observation of erasable holographic gratings at room temperature in Eu.sup.3+ -doped glasses", Optics Letters 11 (10) 653-55 (Oct. 1986).
Behrens et al., "Characteristics of laser-induced gratings in Pr.sup.3+ -and Eu.sup.3+ -doped silicate glasses", J. Optical Soc'Y Am. B 7 (8) 1437-44 (Aug. 1990).
Williams et al., "Permanent photowritten optical gratings in irradiated silicate glasses", Optics Letters 17 (7) 532-34 (Apr. 1, 1992).
Meltz et al., "Formation of Bragg gratings in optical fibers by a transverse holographic method", Optics Letters 14(15) 823-25 (Aug. 1, 1989).
Dutt David A.
Friebele Edward J.
Ruller Jacqueline A.
Williams Glen M.
Ben Loha
Collins Darryl J.
Karasek John J.
McDonnell Thomas E.
The United States of America as represented by the Secretary of
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