Abstract

We report on the first observations, to our knowledge, of the  4F3/2 4I11/2 (1060-nm) induced fluorescence in a Nd-doped CaOAl2O3 glass pumped by an 810-nm diode laser. This new doped glass is produced as a 3-mm-diameter sphere by heating and melting in an aerodynamic containerless trap and is rapidly solidified by radiative cooling (>350 K/s). This glass has an interesting Nd3+ emission maximum at 1067 nm (not many doped glasses have their emission maxima close to 1067 nm). The measured fluorescence decay time of the  4F3/2 level is short (0.3 ms) when the ion is excited by a narrow-band pulsed dye laser.

© 1997 Optical Society of America

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References

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  1. C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
    [CrossRef]
  2. Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
    [CrossRef]
  3. T. Baer, “Continuous-wave laser oscillation in a Nd:YAG sphere,” Opt. Lett. 6, 392–394 (1987).
    [CrossRef]
  4. J. R. Davy, “Development of calcium aluminate glasses for use in the infrared spectrum to 5 μm,” Glass Technol. 19, 32–36 (1978).
  5. E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
    [CrossRef]
  6. H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
    [CrossRef]
  7. D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
    [CrossRef]
  8. S. A. Payne and G. F. Albrecht, “Solid State Lasers,” in Encyclopedia of Lasers and Optical Technology, R. A. Meyers, ed. (Academic, New York, 1991), p. 764.
  9. O. Svelto, Principles of Lasers (Plenum, New York, 1989), p. 494.
  10. B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
    [CrossRef]
  11. J.-P. Coutures, J.-C. Rifflet, D. Billard, and P. Coutures, “Contactless treatments of liquids in a large temperature range by an aerodynamic levitation device and laser heating,” in Proceedings of the Sixth European Symposium on Material Sciences under Microgravity Conditions, Symposium Proceedings 256 (European Space Agency, Noordwijk, The Netherlands, 1986), pp. 427–443.
  12. L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
    [CrossRef]
  13. F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).
  14. P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
    [CrossRef]
  15. F. Babin, P.-F. Paradis, and J.-M. Gagné, “Analysis of laser heating and aerodynamic trapping for containerless glass processing in reduced gravity,” presented at 34th AIAA Aerospace Meeting and Exhibit (American Institute of Aeronautics and Astronautics, Reston, Va., 1996), paper 96–0924.
  16. R. A. Happe, “Implications of zero gravity for producing new glasses in space,” J. Non-Cryst. Solids 3, 375–392 (1970).
    [CrossRef]
  17. S. E. Stokowski, R. A. Saroyan, and M. J. Weber, Nd-doped Laser Glass Spectroscopic and Physical Properties (Lawrence Livermore National Laboratory, Livermore, Calif., 1988), Vols. 1 and 2.
  18. A. Douy, Centre National de la Recherche Scientifique—Centre de Recherche sur la Physique des Hautes Températures, 45071 Orléans, France (personal communication, 1994).
  19. A. L. Huston, H.-B. Lin, J. D. Eversole, and A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B 13, 521–531 (1996).
    [CrossRef]
  20. D. R. Lide, CRC Handbook of Chemistry and Physics, 76th ed. (CRC, Boca Raton, Fla., 1995).
  21. W. J. Miniscalco, “Optical and electronic properties of rare earth ions in glasses,” in Rare-Earth Doped Fibre Lasers and Amplifiers, J. M. F. Digonnet, ed. (Dekker, New York, 1993), pp. 19–133.

1996 (2)

P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
[CrossRef]

A. L. Huston, H.-B. Lin, J. D. Eversole, and A. J. Campillo, “Effect of bubble formation on microdroplet cavity quality factors,” J. Opt. Soc. Am. B 13, 521–531 (1996).
[CrossRef]

1995 (2)

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

1994 (1)

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

1993 (1)

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

1991 (1)

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

1987 (1)

1985 (1)

H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
[CrossRef]

1978 (1)

J. R. Davy, “Development of calcium aluminate glasses for use in the infrared spectrum to 5 μm,” Glass Technol. 19, 32–36 (1978).

1973 (1)

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

1970 (1)

R. A. Happe, “Implications of zero gravity for producing new glasses in space,” J. Non-Cryst. Solids 3, 375–392 (1970).
[CrossRef]

1961 (1)

C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
[CrossRef]

Abe, Y.

H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
[CrossRef]

Babin, F.

P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
[CrossRef]

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

Baer, T.

Blander, M.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

Bond, W. L.

C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
[CrossRef]

Campillo, A. J.

Co?té, B.

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

Coutures, J.-P

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Coutures, J.-P.

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

Davy, J. R.

J. R. Davy, “Development of calcium aluminate glasses for use in the infrared spectrum to 5 μm,” Glass Technol. 19, 32–36 (1978).

Douy, A.

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Eversole, J. D.

Farnan, I.

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Gagné, J.-M.

P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
[CrossRef]

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

Garrett, C. G. B.

C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
[CrossRef]

Gotkas, A. A.

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

Happe, R. A.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

R. A. Happe, “Implications of zero gravity for producing new glasses in space,” J. Non-Cryst. Solids 3, 375–392 (1970).
[CrossRef]

Hengstenberg, D. H.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

Hosono, H.

H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
[CrossRef]

Huston, A. L.

Kaiser, W.

C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
[CrossRef]

Kreidl, N. C.

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

Li, Y.

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

Lin, H.-B.

Liu, Y.

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

Lu, B.

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

Massiot, D.

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

McMillan, P. F.

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

Nelson, L. S.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

Paradis, P.-F.

P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
[CrossRef]

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

Poe, B. T.

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

Richardson, N. L.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

Rifflet, J.-C.

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Topol, L. E.

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

Touzo, B.

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Trumeau, D.

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Uhlmann, E. V.

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

Wang, Y.

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

Weinberg, M. C.

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

Yamazaki, K.

H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
[CrossRef]

Glass Technol. (1)

J. R. Davy, “Development of calcium aluminate glasses for use in the infrared spectrum to 5 μm,” Glass Technol. 19, 32–36 (1978).

J. Am. Ceram. Soc. (3)

E. V. Uhlmann, M. C. Weinberg, N. C. Kreidl, and A. A. Gotkas, “Glass forming ability in calcium aluminate-based systems,” J. Am. Ceram. Soc. 76, 449–453 (1993).
[CrossRef]

H. Hosono, K. Yamazaki, and Y. Abe, “Dopant-free ultraviolet sensitive calcium aluminate glasses,” J. Am. Ceram. Soc. 68, C304–C305 (1985).
[CrossRef]

B. T. Poe, P. F. McMillan, B. Co⁁té, D. Massiot, and J.-P. Coutures, “Structure and dynamics in calcium aluminate liquids: high temperature 27Al NMR and Raman spectroscopy,” J. Am. Ceram. Soc. 77, 1832–1838 (1994).
[CrossRef]

J. Non-Cryst. Solids (2)

R. A. Happe, “Implications of zero gravity for producing new glasses in space,” J. Non-Cryst. Solids 3, 375–392 (1970).
[CrossRef]

L. E. Topol, D. H. Hengstenberg, M. Blander, R. A. Happe, N. L. Richardson, and L. S. Nelson, “Formation of new oxides glasses by laser spin melting and free fall cooling,” J. Non-Cryst. Solids 12, 377–390 (1973).
[CrossRef]

J. Opt. Soc. Am. B (1)

J. Phys. Chem. (1)

D. Massiot, D. Trumeau, B. Touzo, I. Farnan, J.-C. Rifflet, A. Douy, and J.-P Coutures, “Structure and dynamics of CaAl2O4 from liquid to glass: a high temperature 27Al NMR time-resolved study,” J. Phys. Chem. 99, 1645–1655 (1995).
[CrossRef]

Microgravity Sci. Technol. (1)

F. Babin, J.-M. Gagné, P.-F. Paradis, J.-P. Coutures, and J.-C. Rifflet, “High temperature containerless laser processing of dielectric samples in microgravity: study of aerodynamic trapping,” Microgravity Sci. Technol. 7, 283–289 (1995).

Opt. Lett. (1)

Phys. Rev. (1)

C. G. B. Garrett, W. Kaiser, and W. L. Bond, “Stimulated emission into optical whispering modes of spheres,” Phys. Rev. 124, 1807–1809 (1961).
[CrossRef]

Proc. SPIE (1)

Y. Wang, Y. Li, Y. Liu, and B. Lu, “A Nd-glass micro-spherical cavity laser induced by cavity QED effects,” Proc. SPIE 1501, 40–48 (1991).
[CrossRef]

Rev. Sci. Instrum. (1)

P.-F. Paradis, F. Babin, and J.-M. Gagné, “Study of the aerodynamic trap for containerless laser materials processing in microgravity,” Rev. Sci. Instrum. 67, 262–270 (1996).
[CrossRef]

Other (8)

F. Babin, P.-F. Paradis, and J.-M. Gagné, “Analysis of laser heating and aerodynamic trapping for containerless glass processing in reduced gravity,” presented at 34th AIAA Aerospace Meeting and Exhibit (American Institute of Aeronautics and Astronautics, Reston, Va., 1996), paper 96–0924.

S. A. Payne and G. F. Albrecht, “Solid State Lasers,” in Encyclopedia of Lasers and Optical Technology, R. A. Meyers, ed. (Academic, New York, 1991), p. 764.

O. Svelto, Principles of Lasers (Plenum, New York, 1989), p. 494.

D. R. Lide, CRC Handbook of Chemistry and Physics, 76th ed. (CRC, Boca Raton, Fla., 1995).

W. J. Miniscalco, “Optical and electronic properties of rare earth ions in glasses,” in Rare-Earth Doped Fibre Lasers and Amplifiers, J. M. F. Digonnet, ed. (Dekker, New York, 1993), pp. 19–133.

S. E. Stokowski, R. A. Saroyan, and M. J. Weber, Nd-doped Laser Glass Spectroscopic and Physical Properties (Lawrence Livermore National Laboratory, Livermore, Calif., 1988), Vols. 1 and 2.

A. Douy, Centre National de la Recherche Scientifique—Centre de Recherche sur la Physique des Hautes Températures, 45071 Orléans, France (personal communication, 1994).

J.-P. Coutures, J.-C. Rifflet, D. Billard, and P. Coutures, “Contactless treatments of liquids in a large temperature range by an aerodynamic levitation device and laser heating,” in Proceedings of the Sixth European Symposium on Material Sciences under Microgravity Conditions, Symposium Proceedings 256 (European Space Agency, Noordwijk, The Netherlands, 1986), pp. 427–443.

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Figures (6)

Fig. 1
Fig. 1

Glass-processing facility.

Fig. 2
Fig. 2

Typical cooling curve for a Nd-doped 50% CaO–50% Al2O3 sample.

Fig. 3
Fig. 3

Fluorescence spectroscopy setup.

Fig. 4
Fig. 4

Setup for fluorescence decay time measurement.

Fig. 5
Fig. 5

Typical fluorescence spectrum for a Nd-doped 50% CaO–50% Al2O3 sample pumped at 810 nm.

Fig. 6
Fig. 6

Natural logarithm of the fluorescence signal versus time.

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