Abstract

A new lead fluoroborate glass (PbO-PbF2-B2O3) doped with ytterbium (Yb:PbFB) is presented. Samples with different concentrations of Yb3+ were produced and had their emission cross-sections, fluorescence lifetimes and minimum pump intensities determined. They have high refractive index of 2.2 and a density of 4.4 g/cm3. For a doping level of 1.153×1020 ions/cm3, the fluorescence lifetime, after excitation at 968 nm, is 0.81 ms, which is comparable to Yb:tellurite laser glass. Also, an emission band at 1022 nm is measured with emission cross-section of approximately 1.07×10-20 cm2 and fluorescence effective linewidth of 60 nm, which is comparable to Yb:phosphate laser glass.

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References

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  1. J. Nees et al., "Ensuring compactness, reliability and scalability for the next generation of high-field laser," J. Quant. Electron 4, 376-384 (1998).
  2. A. Diening, P. E. A. Mobert and G. Huber, "Diode pumping continuous wave, quasi-continuous-wave, and Q-switched laser operation of Yb,Tm:YLFB at 1.5 and 2.3 mm," J. Appl. Phys. 84, 5900 -5904(1998).
    [CrossRef]
  3. B. R. Judd, "Optical Absorption Intensities of Rare-Earth Ions," Phys. Rev. 127, 750- 761(1962).
    [CrossRef]
  4. G. S. Ofelt, "Intensities of Crystal Spectra of Rare-Earth Ions," J. Chem. Phys. 37, 511-520 (1962).
    [CrossRef]
  5. X. Zou, H. Toratani, "Evaluation spectroscopic properties of Yb3+ doped glasses," Phys. Rev. B 52, 15889-15897 (1995).
    [CrossRef]
  6. C. Jiang, F. Gan, J. Zhang, P. Deng, G. Huang, "Yb:tellurite laser glass with high emission cross-section," Materials Letters 41, 209-214 (1999).
    [CrossRef]
  7. C. Jiang, H. Liu, Q. Zeng, X. Tang, F. Gan, "Yb:phosphate laser glass with high emission cross-section," J. Chem. and Phys. of Solids 61, 1217-1223 (2000).
    [CrossRef]
  8. M. J. Weber, J. E. Lynch, D. H. Blackburn, D. J. Cronin, "Dependence of the stimulated emission cross-section of Yb3+ on host glass composition," IEE J. Quantum Electron 19, 1600-1608 (1983).
    [CrossRef]
  9. P. Nachimuthu, R. Jagannathan, V. N. Kumar, D. N. Rao, "Absorption and emission spectral studies of Sm3+ and Dy3+ ions in PbO-PbF2 glasses," J. Non-Cryst. Solids 217, 215-223 (1997).
    [CrossRef]
  10. M. B. Saisudha, J. Ramakrishna, "Effect of host glass on the optical absorption properties of Nd3+, Sm3+, and Dy3+ in lead borate glasses," Phys. Rev. B 53, 6186-6196 (1995).
    [CrossRef]
  11. F.Donald Bloss, An Introduction to the Methods of Optical Crystallography, (Holt, Rinehart and Winston, Inc, USA, 1961).
  12. N. U. Wetter, "High Efficiency Pumping Scheme for Diode Bars" in Proceedings of the 2000 Conference on Lasers and Electro-Optics (Technical Digest. European Physical Society -Mulhouse, Nice, 2000), pp. 60-61.
  13. V. Petrov, U. Griebner, D. Ehrt, W. Seeber, "Femtosecond self mode locking of Yb:fluoride phosphate glass laser," Opt. Lett. 22, 408-410 (1997).
    [CrossRef] [PubMed]
  14. R. Koch et al., "Efficient room temperature cw Yb:glass laser pumped by a 946 nm Nd:YAG laser," Optics Communications 134, 175-178 (1997).
    [CrossRef]
  15. L. D. Deloach, S. A . Payne, L. Smith, W. L. Kway, W. F. Krupke, "Laser and spectroscopic properties of Sr5 (PO4 )3 F:YB," J. Opt. Soc. Am. B 11, 269-276 (1994).
    [CrossRef]

Other (15)

J. Nees et al., "Ensuring compactness, reliability and scalability for the next generation of high-field laser," J. Quant. Electron 4, 376-384 (1998).

A. Diening, P. E. A. Mobert and G. Huber, "Diode pumping continuous wave, quasi-continuous-wave, and Q-switched laser operation of Yb,Tm:YLFB at 1.5 and 2.3 mm," J. Appl. Phys. 84, 5900 -5904(1998).
[CrossRef]

B. R. Judd, "Optical Absorption Intensities of Rare-Earth Ions," Phys. Rev. 127, 750- 761(1962).
[CrossRef]

G. S. Ofelt, "Intensities of Crystal Spectra of Rare-Earth Ions," J. Chem. Phys. 37, 511-520 (1962).
[CrossRef]

X. Zou, H. Toratani, "Evaluation spectroscopic properties of Yb3+ doped glasses," Phys. Rev. B 52, 15889-15897 (1995).
[CrossRef]

C. Jiang, F. Gan, J. Zhang, P. Deng, G. Huang, "Yb:tellurite laser glass with high emission cross-section," Materials Letters 41, 209-214 (1999).
[CrossRef]

C. Jiang, H. Liu, Q. Zeng, X. Tang, F. Gan, "Yb:phosphate laser glass with high emission cross-section," J. Chem. and Phys. of Solids 61, 1217-1223 (2000).
[CrossRef]

M. J. Weber, J. E. Lynch, D. H. Blackburn, D. J. Cronin, "Dependence of the stimulated emission cross-section of Yb3+ on host glass composition," IEE J. Quantum Electron 19, 1600-1608 (1983).
[CrossRef]

P. Nachimuthu, R. Jagannathan, V. N. Kumar, D. N. Rao, "Absorption and emission spectral studies of Sm3+ and Dy3+ ions in PbO-PbF2 glasses," J. Non-Cryst. Solids 217, 215-223 (1997).
[CrossRef]

M. B. Saisudha, J. Ramakrishna, "Effect of host glass on the optical absorption properties of Nd3+, Sm3+, and Dy3+ in lead borate glasses," Phys. Rev. B 53, 6186-6196 (1995).
[CrossRef]

F.Donald Bloss, An Introduction to the Methods of Optical Crystallography, (Holt, Rinehart and Winston, Inc, USA, 1961).

N. U. Wetter, "High Efficiency Pumping Scheme for Diode Bars" in Proceedings of the 2000 Conference on Lasers and Electro-Optics (Technical Digest. European Physical Society -Mulhouse, Nice, 2000), pp. 60-61.

V. Petrov, U. Griebner, D. Ehrt, W. Seeber, "Femtosecond self mode locking of Yb:fluoride phosphate glass laser," Opt. Lett. 22, 408-410 (1997).
[CrossRef] [PubMed]

R. Koch et al., "Efficient room temperature cw Yb:glass laser pumped by a 946 nm Nd:YAG laser," Optics Communications 134, 175-178 (1997).
[CrossRef]

L. D. Deloach, S. A . Payne, L. Smith, W. L. Kway, W. F. Krupke, "Laser and spectroscopic properties of Sr5 (PO4 )3 F:YB," J. Opt. Soc. Am. B 11, 269-276 (1994).
[CrossRef]

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Figures (2)

Fig 1.
Fig 1.

Absorption spectrum for the lead fluoroborate glass (3 mm thickness) doped with 1.153x1020 ions/cm3 of Yb3+.

Fig 2.
Fig 2.

Absorption and emission cross-section spectra for lead fluoroborate glasses doped with Yb3+ for excitation at 968 nm.

Tables (2)

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Table 1: Spectroscopic properties of Yb3+ doped lead fluoroborate glasses.

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Table 2: Spectroscopic properties of some laser glasses and the YAG crystal doped with Yb3+ [6,7,13,14,15].

Equations (4)

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A R = 8 π cn 2 ( 2 J + 1 ) λ p 4 ( 2 J + 1 ) ρ k ( λ ) d λ
σ em ( λ ) = λ 4 A R g ( λ ) 8 π n 2 c
I min = β min I sat
β = σ a b s ( λ 0 ) σ e m ( λ 0 ) + σ a b s ( λ 0 ) I s a t = h c λ p τ f σ a b s ( λ p )

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