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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 10 — Oct. 1, 2006
  • pp: 2066–2078

Polarization and local disorder effects on the properties of Er 3 + -doped X Bi ( Y O 4 ) 2 , X = Li or Na and Y = W or Mo, crystalline tunable laser hosts

Mauricio Rico, Antonio Méndez-Blas, Vladimir Volkov, María Ángeles Monge, Concepción Cascales, Carlos Zaldo, Andreas Kling, and María Teresa Fernández-Díaz  »View Author Affiliations


JOSA B, Vol. 23, Issue 10, pp. 2066-2078 (2006)
http://dx.doi.org/10.1364/JOSAB.23.002066


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Abstract

Pure and Er-doped ( [ Er ] crystal 2.4 × 10 20 cm 3 ) , Na Bi ( W O 4 ) 2 (NBW), Na Bi ( Mo O 4 ) 2 , and Li Bi ( Mo O 4 ) 2 crystals have been grown by the Czochralski method. The three crystal hosts have similar structural and optical properties. The noncentrosymmetric space group I 4 ¯ (No. 82) crystallographic structure has been established through 300 K single-crystal x-ray and neutron (for NBW only) diffraction. Er 3 + energy levels were determined experimentally and simulated in the S 4 symmetry through a crystal-field analysis. With this background, the large spectroscopic bandwidths observed were ascribed to the presence of two 2 b and 2 d sites for Er 3 + and to different short-range Na + and Bi 3 + distributions around both sites. The radiative properties of Er 3 + are described by the Judd–Ofelt theory achieving branching ratios and radiative lifetimes for transitions useful as laser channels. The I 13 2 4 I 15 2 4 laser channel ( λ 1.5 μ m ) shows a peak emission cross-section σ EMI ( λ 1530 nm ) 0.5 × 10 20 cm 2 and a quantum efficiency η 0.68 to 0.74. The laser emission is envisaged to be tunable by Δ λ 100 nm .

© 2006 Optical Society of America

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(160.3380) Materials : Laser materials
(160.4760) Materials : Optical properties
(160.5690) Materials : Rare-earth-doped materials
(300.1030) Spectroscopy : Absorption
(300.2140) Spectroscopy : Emission

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 19, 2005
Revised Manuscript: May 3, 2006
Manuscript Accepted: May 16, 2006

Citation
Mauricio Rico, Antonio Méndez-Blas, Vladimir Volkov, María Ángeles Monge, Concepción Cascales, Carlos Zaldo, Andreas Kling, and María Teresa Fernández-Díaz, "Polarization and local disorder effects on the properties of Er3+-doped XBi(YO4)2, X=Li or Na and Y=W or Mo, crystalline tunable laser hosts," J. Opt. Soc. Am. B 23, 2066-2078 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-10-2066


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