Abstract

We present some strong evidence against the assignment of an ytterbium-related oxygen deficiency center (ODC) near 230nm in Yb-doped aluminosilicate glass in the Letter by Yoo et al. [Opt. Lett. 32, 1626 (2007)] . The strong 230nm absorption band is actually a charge-transfer band corresponding to the transfer of an electron from nearby oxygen ligands to the ytterbium ion and not related to ODCs.

© 2008 Optical Society of America

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References

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  1. S. Yoo, C. Basu, A. Boyland, C. Sones, J. Nilsson, J. Sahu, and D. Payne, Opt. Lett. 32, 1626 (2007).
    [CrossRef] [PubMed]
  2. M. Engholm, L. Norin, and D. Åberg, Opt. Lett. 32, 3352 (2007).
    [CrossRef] [PubMed]
  3. C. Pedrini, Phys. Status Solidi A 2, 185 (2005).
    [CrossRef]
  4. M. Engholm and L. Norin, Opt. Express 16, 1260 (2008).
    [CrossRef] [PubMed]
  5. M. Cohen and L. Makar, Phys. Status Solidi A 73, 593 (1982).
    [CrossRef]

2008 (1)

2007 (2)

2005 (1)

C. Pedrini, Phys. Status Solidi A 2, 185 (2005).
[CrossRef]

1982 (1)

M. Cohen and L. Makar, Phys. Status Solidi A 73, 593 (1982).
[CrossRef]

Åberg, D.

Basu, C.

Boyland, A.

Cohen, M.

M. Cohen and L. Makar, Phys. Status Solidi A 73, 593 (1982).
[CrossRef]

Engholm, M.

Makar, L.

M. Cohen and L. Makar, Phys. Status Solidi A 73, 593 (1982).
[CrossRef]

Nilsson, J.

Norin, L.

Payne, D.

Pedrini, C.

C. Pedrini, Phys. Status Solidi A 2, 185 (2005).
[CrossRef]

Sahu, J.

Sones, C.

Yoo, S.

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Figures (1)

Fig. 1
Fig. 1

Absorption spectrum showing the strong CT band near 230 nm in Yb-doped aluminosilicate glass (upper solid curve) prepared in 90 % O 2 10 % Cl 2 atmosphere and in 100% O 2 atmosphere (upper dashed curve). No absorption band at 230 nm is observed for Nd- (dashed–dotted curve) or Er-doped (lower solid curve) aluminosilicate glass.

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