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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 26 — Dec. 25, 2006
  • pp: 12584–12589

Three-photon indirect sensitization in green upconversion luminescence of Er/Tm codoped NaY(WO4)2 crystal

Feng Song, Kang Zhang, Jing Su, Lin Han, Jing Liang, Xuezhi Zhang, Lihua Yan, Jianguo Tian, and Jingjun Xu  »View Author Affiliations


Optics Express, Vol. 14, Issue 26, pp. 12584-12589 (2006)
http://dx.doi.org/10.1364/OE.14.012584


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Abstract

Upconversion spectra of Er/Tm codoped NaY(WO4)2 crystal excited by 974nm laser is investigated. Intensive 520nm/550nm and 800nm emissions are observed. Three-photon process at high pumping power is presented in the green upconversion. A model is proposed that the three-photon process is actualized by the energy indirect sensitization between two Er3+ ions and one Tm3+ ion, via excited state absorption and two cross relaxations. Two Er3+ ions totally absorb three 974nm photons, emitting one green photon, and Tm3+ ion plays the role of temporary energy storage in this process.

© 2006 Optical Society of America

OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(140.3380) Lasers and laser optics : Laser materials
(190.7220) Nonlinear optics : Upconversion

ToC Category:
Atomic and Molecular Physics

History
Original Manuscript: September 1, 2006
Revised Manuscript: November 8, 2006
Manuscript Accepted: November 8, 2006
Published: December 22, 2006

Citation
Kang Zhang, Feng Song, Jing Su, Lin Han, Jing Liang, Xuezhi Zhang, Lihua Yan, Jianguo Tian, and Jingjun Xu, "Three-photon indirect sensitization in green upconversion luminescence of Er/Tm codoped NaY(WO4)2 crystal," Opt. Express 14, 12584-12589 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-26-12584


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