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Correlations between site geometries and level energies in the laser system Nd1−x Y x P5O14

Abstract

The pentaphosphate system Nd1−x Y x P5O14 covers four crystalline phases with five different site geometries for Nd. We determined the4F3/2,4I13/2,4I11/2,4I9/2 stark levels and identified the sites spectroscopically, including the case of the monoclinic layer structureC2/c which has two Nd sites. Crystal field calculations for the energy levels in the monoclinic phaseP2 1/c and the orthorhombic phasepnma with tetragonal and orthorhombic site symmetry approximations are reasonable but reveal their shortcomings. As a consequence, we consider it improper to try to calculate rare-earth optical transition probabilities with approximate crystal fields. Random distribution of Nd and Y causes inhomogeneous broadening (∼6 Å) which peaks atx=0.5. Thermal equilibrium between the4F3/2 levels is reached within 2–5×10−13 sec. The three room temperature modifications could be lased cw. Pure NdP5O14 was found to be the best laser.

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References

  1. 1.

    H.G.Danielmeyer, H.P.Weber: IEEE J. Quant. Electr. QE8, 805 (1972)

  2. 2.

    H.P.Weber, T.C.Damen, H.G.Danielmeyer, B.C.Tofield: Appl. Phys. Lett.22, 534 (1972)

  3. 3.

    H.G.Danielmeyer, G.Huber, W.W.Krühler, J.P.Jeser Appl. Phys.2, 335 (1973)

  4. 4.

    G.Huber, J.P.Jeser, W.W.Krühler, H.G.Danielmeyer: IEEE J. Quant. Electr. QE-10, 766 (1974)

  5. 5.

    W.W.Krühler, J.P.Jeser, H.G.Danielmeyer: Appl Phys.2, 329 (1974)

  6. 6.

    H.G.Danielmeyer J.P.Jeser, E.Schönherr, W.Stetter: J. Crystal Growth22, 298 (1974)

  7. 7.

    J.P.Jeser: Ph. D. Dissertation, Stuttgart (1974)

  8. 8.

    A.Durif: Bull. Soc. fr. Minéral Cristallogr.94, 314 (1971)

  9. 9.

    K.R.Albrand, T.R.Attig, J.Fenner, J.P.Jeser, D.Mootz: Mater. Res. Bull.9, 129 (1974)

  10. 10.

    H.Y.-PHong: Acta Cryst. B30, 468 (1974)

  11. 11.

    G.Huber, W.W.Krühler, W.Bludau, H.G.Danielmeyer: Unpublished

  12. 12.

    M.Bagieu-Beucher, D. TranQui: Bull. Soc. fr. Minéral Cristallogr.93, 505 (1970)

  13. 13.

    M.Bagieu, I.Tordjman, A.Durif, G.Bassi. Cryst. Struct. Comm.3, 387 (1973)

  14. 14.

    H.Y.-P.Hong, J.W.Pierce: Mat. Res. Bull9, 179 (1974)

  15. 15.

    D. TranQui, M.Bagieu-Beucher, A.Durif: Bull. Soc. fr. Minéral Crystallogr.95, 437 (1972)

  16. 16.

    H.Schulz, K.H.Thiemann, J.Fenner: Mat. Res. Bull.9, 1525 (1974)

  17. 17.

    W.W.Krühler: Ph. D. Dissertation Stuttgart (1974)

  18. 18.

    M.Blätte, H.G.Danielmeyer, R.Ulrich: Appl Phys.1, 275 (1973)

  19. 19.

    H.G.Danielmeyer, M.Blätte, P.Palmer: Appl. phys.1, 269 (1973)

  20. 20.

    V.Nekvasil: J. Phys. C. (Solid State Phys.)7, L 246 (1974)

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Krühler, W.W., Huber, G., Danielmeyer, H.G. et al. Correlations between site geometries and level energies in the laser system Nd1−x Y x P5O14 . Appl. Phys. 8, 261–268 (1975). https://doi.org/10.1007/BF00896620

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Keywords

  • Crystal Field
  • Fluorescence Lifetime
  • Monoclinic Phase
  • Symmetry Approximation
  • Crystal Field Parameter