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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 6 — Jun. 1, 2010
  • pp: 1158–1164

Ultraviolet-blue upconversion emissions of Ho 3 + ions

G. Y. Chen, C. H. Yang, B. Aghahadi, H. J. Liang, Y. Liu, L. Li, and Z. G. Zhang  »View Author Affiliations


JOSA B, Vol. 27, Issue 6, pp. 1158-1164 (2010)
http://dx.doi.org/10.1364/JOSAB.27.001158


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Abstract

Ultraviolet-blue upconversion (UC) radiations of Ho 3 + ions at 240, 290, 360, 385, 418, 445, 485 nm were observed in hexagonal Na Y F 4 : Yb 3 + Ho 3 + powders under diode laser excitation of 970 nm . UC mechanism analyses illustrate that successive energy transfers from Yb 3 + to Ho 3 + generate emissions at 240, 360, 385, and 418 nm , while cross relaxations between Ho 3 + ions evoke UC emissions at 290 and 445 nm . Power dependence analyses indicate that these UC emissions already have intense saturation effects even at low-power density range of 0.3 38 W cm 2 . Theoretical calculations based on steady-state equations demonstrate the proposed UC mechanisms and explain well the observed saturation effects.

© 2010 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3610) Lasers and laser optics : Lasers, ultraviolet
(190.4180) Nonlinear optics : Multiphoton processes
(190.7220) Nonlinear optics : Upconversion
(300.6410) Spectroscopy : Spectroscopy, multiphoton
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 29, 2009
Revised Manuscript: January 31, 2010
Manuscript Accepted: February 23, 2010
Published: May 6, 2010

Citation
G. Y. Chen, C. H. Yang, B. Aghahadi, H. J. Liang, Y. Liu, L. Li, and Z. G. Zhang, "Ultraviolet-blue upconversion emissions of Ho3+ ions," J. Opt. Soc. Am. B 27, 1158-1164 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-6-1158

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