Abstract

Single-crystal fibers of Ti3+:Al2O3 have been grown by the laser-heated pedestal growth technique and shown to exhibit radial refractive-index gradients. A refractive-index increase of approximately 12% in the fiber core with respect to the fiber sidewalls has been measured. The index profile can be fitted with a parabolic model. Postgrowth treatment of Cr3+:Gd3Sc2Al3O12 fibers has been shown to produce a uniform cladding region with a graded-index core. The core index is some 12.5% larger than the cladding region, with an index profile shape that is approximately parabolic in nature.

© 1998 Optical Society of America

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References

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  1. M. J. F. Digonnet, ed., Rare Earth Doped Fiber Lasers and Amplifiers (Dekker, New York, 1993).
  2. A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
    [CrossRef]
  3. R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
    [CrossRef]
  4. M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
    [CrossRef]
  5. K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
    [CrossRef]
  6. W. J. Stewart, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 28.
  7. J. A. Arnaud and R. M. Deroiser, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 29.
  8. W. Eickhoff and E. Weidel, Opt. Quantum Electron. 7, 109 (1975).
    [CrossRef]
  9. R. S. Feigelson, Mater. Sci. Eng. B 1, 67 (1988).
    [CrossRef]
  10. C. A. Burrus and L. A. Coldren, Appl. Phys. Lett. 31, 383 (1977).
    [CrossRef]
  11. C. E. Chang and W. R. Wilcox, Int. J. Heat Mass Transfer 19, 355 (1976).
    [CrossRef]
  12. I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
    [CrossRef]

1996

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
[CrossRef]

1994

R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
[CrossRef]

1988

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

R. S. Feigelson, Mater. Sci. Eng. B 1, 67 (1988).
[CrossRef]

1987

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

1977

C. A. Burrus and L. A. Coldren, Appl. Phys. Lett. 31, 383 (1977).
[CrossRef]

1976

C. E. Chang and W. R. Wilcox, Int. J. Heat Mass Transfer 19, 355 (1976).
[CrossRef]

1975

W. Eickhoff and E. Weidel, Opt. Quantum Electron. 7, 109 (1975).
[CrossRef]

Arnaud, J. A.

J. A. Arnaud and R. M. Deroiser, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 29.

Bhalla, A. S.

R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
[CrossRef]

Boulon, G.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

Brenier, A.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

Burrus, C. A.

C. A. Burrus and L. A. Coldren, Appl. Phys. Lett. 31, 383 (1977).
[CrossRef]

Chang, C. E.

C. E. Chang and W. R. Wilcox, Int. J. Heat Mass Transfer 19, 355 (1976).
[CrossRef]

Cohenadad, M. T.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

Coldren, L. A.

C. A. Burrus and L. A. Coldren, Appl. Phys. Lett. 31, 383 (1977).
[CrossRef]

Deroiser, R. M.

J. A. Arnaud and R. M. Deroiser, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 29.

Diggonet, M. J. F.

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

Eickhoff, W.

W. Eickhoff and E. Weidel, Opt. Quantum Electron. 7, 109 (1975).
[CrossRef]

Feigelson, R. S.

R. S. Feigelson, Mater. Sci. Eng. B 1, 67 (1988).
[CrossRef]

Gaeta, C. J.

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

Guo, R.

R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
[CrossRef]

Jurdyc, A. M.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

le Cross, J.

R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
[CrossRef]

Makishima, A.

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

Nicoara, D.

I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
[CrossRef]

Nicoara, I.

I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
[CrossRef]

O’Meara, D.

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

Shaw, H. J.

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

Shingyouchi, K.

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

Stewart, W. J.

W. J. Stewart, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 28.

Takenouchi, S.

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

Tutumi, M.

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

Verweij, H.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

Vizman, D.

I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
[CrossRef]

Weidel, E.

W. Eickhoff and E. Weidel, Opt. Quantum Electron. 7, 109 (1975).
[CrossRef]

Wilcox, W. R.

C. E. Chang and W. R. Wilcox, Int. J. Heat Mass Transfer 19, 355 (1976).
[CrossRef]

Appl. Phys. Lett.

C. A. Burrus and L. A. Coldren, Appl. Phys. Lett. 31, 383 (1977).
[CrossRef]

Int. J. Heat Mass Transfer

C. E. Chang and W. R. Wilcox, Int. J. Heat Mass Transfer 19, 355 (1976).
[CrossRef]

J. Appl. Phys.

R. Guo, A. S. Bhalla, and J. le Cross, J. Appl. Phys. 75, 4704 (1994).
[CrossRef]

J. Cryst. Growth

I. Nicoara, D. Vizman, and D. Nicoara, J. Cryst. Growth 169, 102 (1996).
[CrossRef]

J. Lightwave Technol.

M. J. F. Diggonet, C. J. Gaeta, D. O’Meara, and H. J. Shaw, J. Lightwave Technol. LT-5, 642 (1987).
[CrossRef]

J. Non-Cryst. Solids

K. Shingyouchi, A. Makishima, M. Tutumi, and S. Takenouchi, J. Non-Cryst. Solids 100, 383 (1988).
[CrossRef]

Mater. Sci. Eng. B

R. S. Feigelson, Mater. Sci. Eng. B 1, 67 (1988).
[CrossRef]

Opt. Mater.

A. Brenier, A. M. Jurdyc, H. Verweij, M. T. Cohenadad, and G. Boulon, Opt. Mater. 5, 233 (1996).
[CrossRef]

Opt. Quantum Electron.

W. Eickhoff and E. Weidel, Opt. Quantum Electron. 7, 109 (1975).
[CrossRef]

Other

M. J. F. Digonnet, ed., Rare Earth Doped Fiber Lasers and Amplifiers (Dekker, New York, 1993).

W. J. Stewart, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 28.

J. A. Arnaud and R. M. Deroiser, in Optical Fibres, Integrated Optics and Their Military Applications, H. Hodara, ed., AGARD Conf. Proc.219 (1977), paper 29.

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Figures (3)

Fig. 1
Fig. 1

Experiment to measure refractive-index profiles: MO, microscope objective; BS, beam splitter; PC, computer.

Fig. 2
Fig. 2

Refractive-index profile of as-grown Ti3+:Al2O3 fiber. The dashed curve shows a parabolic fit to the profile.

Fig. 3
Fig. 3

Refractive-index profile of a laser-treated Cr:GSAG rod. The dashed curve shows a parabolic fit to the profile.

Equations (1)

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R=nfiber-nairnfiber+nair2.

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