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Optics Letters

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  • Vol. 24, Iss. 11 — Jun. 1, 1999
  • pp: 786–788

Infrared femtosecond laser pulse induced permanent reduction of Eu3+ to Eu2+ in a fluorozirconate glass

Jianrong Qiu*, K. Kojima, K. Miura, T. Mitsuyu, and K. Hirao  »View Author Affiliations


Optics Letters, Vol. 24, Issue 11, pp. 786-788 (1999)
http://dx.doi.org/10.1364/OL.24.000786


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Abstract

We report what is believed to be the first observation of permanent photoreduction of Eu3+ to Eu2+ in transparent and colorless Eu3+ -doped fluorozirconate glass at room temperature, using an infrared femtosecond laser. Difference absorption and electron-spin-resonance spectra of the glass before and after laser irradiation showed that a portion of the Eu3+ ions in the focused part of the laser inside the glass were reduced to Eu2+ ions after laser irradiation. It is suggested that Eu3+ ions act as electron-trapping centers, whereas active sites in the glass matrix act as hole-trapping centers, leading to the formation of Eu2+ ions. The observed phenomenon is inferred to be useful in the fabrication of optical memory devices with high storage density and waveguide-type micro-optical devices.

© 1999 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(140.3450) Lasers and laser optics : Laser-induced chemistry
(140.3460) Lasers and laser optics : Lasers
(160.4670) Materials : Optical materials
(160.5690) Materials : Rare-earth-doped materials

Citation
Jianrong Qiu*, K. Kojima, K. Miura, T. Mitsuyu, and K. Hirao, "Infrared femtosecond laser pulse induced permanent reduction of Eu3+ to Eu2+ in a fluorozirconate glass," Opt. Lett. 24, 786-788 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-11-786


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