Abstract

In this paper we report the effect of heat treatment of 10 mol% Na2O-89.5 mol% TeO2 glass for studying the fluorescence and line broadening behavior of Er-ions in the glass-ceramic matrix. Controlled crystal growth measurements using the X-ray line broadening technique for samples heat treated in the temperature range of 583–693 K were carried out and compared with the photoluminescence studies. The influence of crystal growth on line broadening of 4I13/2 spectra and metastable lifetime of 4I13/2 level is compared for various heat treatment temperatures. The full-width-of-half maxima increase with increasing heat treatment temperature and then fall rapidly at high temperatures.

© 2008 Optical Society of America

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  1. E. Desurvier, Erbium-doped Fibre Amplifiers - principles and applications, (Wiley Interscience, 2002) pp. 218-19, 244-245.
  2. A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
    [CrossRef]
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  4. J. E. Stanworth, "Tellurite Glasses," Nature 169, 581-582 (1952).
    [CrossRef]
  5. J. S Wang, E. M Vogel, E. Snitzer, "Tellurite Glasses - a new candidate for fiber devices," Opt. Mat. 3, 187-203 (1994).
    [CrossRef]
  6. J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
    [CrossRef]
  7. T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
    [CrossRef]
  8. S. X. Shen, B. Richards, and A. Jha, "Enhancement in pump inversion efficiency at 980 nm in Er3+, Er3+/Eu3+ and Er3+/Ce3+ doped tellurite glass fibers," Opt. Express 14, 5050-5054 (2006).
    [CrossRef] [PubMed]
  9. J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
    [CrossRef]
  10. S. L. Tagg, J. C. Huffman, and J. W. Zwanziger, "Crystal structure and Sodium Environments in Sodium tetratellurite, Na2Te4O9 and Sodium Tellurite Na2TeO3 by X-Ray crystallography and Na23 NMR," Chem. Mater. 6, 1884-1889 (1994).
    [CrossRef]
  11. D. M. Zhu, W. C Zhou. amd C. S. Ray, "A new crystalline phase (Na2O.8TeO2) in the Na2O-TeO2 system," J. Mater. Sci. Lett. 20, 1961-1963 (2001).
    [CrossRef]
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    [CrossRef]
  14. T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
    [CrossRef]
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    [CrossRef]

2006 (1)

2005 (1)

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

2004 (1)

W. J. Chung, A. Jha, S. Shen, and P. Joshi, "The effect of Er-ion concentration on the Er3+: 4I13/2�??4I15/2 transition in tellurite glasses," Phil. Mag. 84, 1197-1207 (2004).
[CrossRef]

2002 (1)

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

2001 (1)

D. M. Zhu, W. C Zhou. amd C. S. Ray, "A new crystalline phase (Na2O.8TeO2) in the Na2O-TeO2 system," J. Mater. Sci. Lett. 20, 1961-1963 (2001).
[CrossRef]

2000 (1)

A. Jha, S. Shen, and M. Naftaly, "Structural origin of spectral broadening of 1.5-mu m emission in Er3+-doped tellurite glasses," Phys. Rev. B 62, 6215-6227 (2000).

1995 (1)

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

1994 (2)

S. L. Tagg, J. C. Huffman, and J. W. Zwanziger, "Crystal structure and Sodium Environments in Sodium tetratellurite, Na2Te4O9 and Sodium Tellurite Na2TeO3 by X-Ray crystallography and Na23 NMR," Chem. Mater. 6, 1884-1889 (1994).
[CrossRef]

J. S Wang, E. M Vogel, E. Snitzer, "Tellurite Glasses - a new candidate for fiber devices," Opt. Mat. 3, 187-203 (1994).
[CrossRef]

1992 (2)

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
[CrossRef]

1990 (1)

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

1952 (1)

J. E. Stanworth, "Tellurite Glasses," Nature 169, 581-582 (1952).
[CrossRef]

Ainslie, B. J.

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

Almeida, R. M.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Armitage, J. R.

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

Chiasera, A.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Chung, W. J.

W. J. Chung, A. Jha, S. Shen, and P. Joshi, "The effect of Er-ion concentration on the Er3+: 4I13/2�??4I15/2 transition in tellurite glasses," Phil. Mag. 84, 1197-1207 (2004).
[CrossRef]

Craig-Ryan, S. P.

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

Ferrari, M.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Fortes, L. M.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Gonçalves, M. C.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Hensley, D. A.

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

Heo, J.

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

Hoshino, K.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

Huffman, J. C.

S. L. Tagg, J. C. Huffman, and J. W. Zwanziger, "Crystal structure and Sodium Environments in Sodium tetratellurite, Na2Te4O9 and Sodium Tellurite Na2TeO3 by X-Ray crystallography and Na23 NMR," Chem. Mater. 6, 1884-1889 (1994).
[CrossRef]

Jha, A.

S. X. Shen, B. Richards, and A. Jha, "Enhancement in pump inversion efficiency at 980 nm in Er3+, Er3+/Eu3+ and Er3+/Ce3+ doped tellurite glass fibers," Opt. Express 14, 5050-5054 (2006).
[CrossRef] [PubMed]

W. J. Chung, A. Jha, S. Shen, and P. Joshi, "The effect of Er-ion concentration on the Er3+: 4I13/2�??4I15/2 transition in tellurite glasses," Phil. Mag. 84, 1197-1207 (2004).
[CrossRef]

A. Jha, S. Shen, and M. Naftaly, "Structural origin of spectral broadening of 1.5-mu m emission in Er3+-doped tellurite glasses," Phys. Rev. B 62, 6215-6227 (2000).

Joshi, P.

W. J. Chung, A. Jha, S. Shen, and P. Joshi, "The effect of Er-ion concentration on the Er3+: 4I13/2�??4I15/2 transition in tellurite glasses," Phil. Mag. 84, 1197-1207 (2004).
[CrossRef]

Kanamori, T.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Kobayashi, K.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

Lam, D.

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

Massicott, J. F.

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

Mattarelli, M.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Mendoza, E. A.

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

Mochida, N.

T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
[CrossRef]

Montagna, M.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Mori, A.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

Naftaly, M.

A. Jha, S. Shen, and M. Naftaly, "Structural origin of spectral broadening of 1.5-mu m emission in Er3+-doped tellurite glasses," Phys. Rev. B 62, 6215-6227 (2000).

Ohishi, Y.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Ohtsuka, A.

T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
[CrossRef]

Oikawa, K.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

Richards, B.

Righini, G. C.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Sakamoto, T.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Santos, L. F.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Sekiya, T.

T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
[CrossRef]

Shen, S.

W. J. Chung, A. Jha, S. Shen, and P. Joshi, "The effect of Er-ion concentration on the Er3+: 4I13/2�??4I15/2 transition in tellurite glasses," Phil. Mag. 84, 1197-1207 (2004).
[CrossRef]

A. Jha, S. Shen, and M. Naftaly, "Structural origin of spectral broadening of 1.5-mu m emission in Er3+-doped tellurite glasses," Phys. Rev. B 62, 6215-6227 (2000).

Shen, S. X.

Shikano, K.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

Shimizu, M.

A. Mori, T. Sakamoto, K. Kobayashi, K. Shikano, K. Oikawa, K. Hoshino, T. Kanamori, Y. Ohishi, and M. Shimizu, "1.58µm broadband Er-doped tellurite fiber amplifier," J Lightwave Technol. 20, 822-827 (2002).
[CrossRef]

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Sigel, G. L.

J. Heo, D. Lam, G. L. Sigel, Jr., E. A. Mendoza, and D. A. Hensley, "Spectroscopic analysis of the structure and properties of alkali tellurite glasses," J. Am. Cer. Soc. 75, 277-81 (1992).
[CrossRef]

Snitzer, E.

J. S Wang, E. M Vogel, E. Snitzer, "Tellurite Glasses - a new candidate for fiber devices," Opt. Mat. 3, 187-203 (1994).
[CrossRef]

Stanworth, J. E.

J. E. Stanworth, "Tellurite Glasses," Nature 169, 581-582 (1952).
[CrossRef]

Sudo, S.

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Tagg, S. L.

S. L. Tagg, J. C. Huffman, and J. W. Zwanziger, "Crystal structure and Sodium Environments in Sodium tetratellurite, Na2Te4O9 and Sodium Tellurite Na2TeO3 by X-Ray crystallography and Na23 NMR," Chem. Mater. 6, 1884-1889 (1994).
[CrossRef]

Terunuma, Y.

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Tonokawa, M.

T. Sekiya, N. Mochida, A. Ohtsuka, and M. Tonokawa, "Raman spectra of MO1/2 TeO2 (M = Li, Na, K, Rb, Cs and Tl) glasses," J. Non-crystal. Solids 144, 128-144 (1992).
[CrossRef]

Vogel, E. M

J. S Wang, E. M Vogel, E. Snitzer, "Tellurite Glasses - a new candidate for fiber devices," Opt. Mat. 3, 187-203 (1994).
[CrossRef]

Wang, J. S

J. S Wang, E. M Vogel, E. Snitzer, "Tellurite Glasses - a new candidate for fiber devices," Opt. Mat. 3, 187-203 (1994).
[CrossRef]

Wyatt, R.

J. F. Massicott, J. R. Armitage, R. Wyatt, B. J. Ainslie, and S. P. Craig-Ryan, "High-gain broadband 1.6µm Er3+-doped silica fibre amplifier," Electron. Lett. 26, 1645-1646 (1990).
[CrossRef]

Yamada, M.

T. Sakamoto, M. Shimizu, T. Kanamori, Y. Terunuma, Y. Ohishi, M. Yamada, and S. Sudo, "1.4 µm-Band Gain Characteristics of a Tm-Ho-doped ZBLYAN Fiber Amplifier Pumped in the 0.8 µm Band," IEEE Photonics Technol. Lett. 7, 983-985 (1995).
[CrossRef]

Zampedri, L.

M. Mattarelli, M. Montagna, L. Zampedri, A. Chiasera, M. Ferrari, G. C. Righini, L. M. Fortes, M. C. Gonçalves, L. F. Santos and R. M. Almeida, "Self-absorption and radiation trapping in Er3+-doped TeO2 based glasses," Europhys. Lett. 71, 394 (2005).
[CrossRef]

Zhou, W. C

D. M. Zhu, W. C Zhou. amd C. S. Ray, "A new crystalline phase (Na2O.8TeO2) in the Na2O-TeO2 system," J. Mater. Sci. Lett. 20, 1961-1963 (2001).
[CrossRef]

Zhu, D. M.

D. M. Zhu, W. C Zhou. amd C. S. Ray, "A new crystalline phase (Na2O.8TeO2) in the Na2O-TeO2 system," J. Mater. Sci. Lett. 20, 1961-1963 (2001).
[CrossRef]

Zwanziger, J. W.

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http://abulafia.mt.ic.ac.uk/shanon/ptable.php

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Figures (5)

Fig 1.
Fig 1.

XRD for 0.5 Er2O3 10 Na2O 89.5 TeO2 glass crystallized at different temperature for 10 hours and not heat treated (NHT) sample. 593, 613, 653 and 693 K sample showing Na2Te8O17 crystal.

Fig 2.
Fig 2.

A comparison of Raman spectra for annealed sodium tellurite glass ceramics using excitation wavelength at 633 nm.

Fig 3.
Fig 3.

Er3+ ion emission spectroscopy for heat treated sodium tellurite (0.5 Er2O3 10 Na2O 89.5 TeO2) glass for 10 hours. NHT is non heat treated glass.

Fig 4.
Fig 4.

Er3+ ion emission line FWHM and lifetimes for 4I13/2 level heat treated sodium tellurite (0.5 Er2O3 10 Na2O 89.5 TeO2) glass for 10 hours.

Fig 5.
Fig 5.

A comparison of visible emissions at around 550 nm (green) and 645 nm (red) in heat treated sodium tellurite glass ceramic materials

Tables (1)

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Table 1. The dependence of FWHM, lifetime of 4I13/2 level with 800 nm pump and crystal size on temperature for heat treated sodium tellurite (0.5 Er2O3 10 Na2O 89.5 TeO2) glass for 10 hours.

Equations (1)

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D hkl = κ λ β   cos θ

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