Abstract

We investigate the influence of the excitation spot diameter on the laser threshold of a scattering amplifying medium. Fluorescence spectra are recorded from a suspension of TiO2 scatterers in Sulforhodamine B dye. The threshold pump intensity becomes larger by a factor of 70 if the excitation beam diameter gets close to the mean free path l. This increase is explained by use of a simple model describing diffusion out of the amplifying volume and is confirmed by a Monte Carlo simulation.

© 1999 Optical Society of America

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  1. V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).
  2. N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
    [CrossRef]
  3. M. Siddique, R. R. Alfano, G. A. Berger, M. Kempe, and A. Z. Genack, Opt. Lett. 21, 450 (1996).
    [CrossRef] [PubMed]
  4. D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
    [CrossRef]
  5. See, e.g., P. W. Milonni and J. H. Eberly, eds., Lasers (Wiley, New York, 1988).
  6. G. A. Berger, M. Kempe, and A. Z. Genack, Phys. Rev. E 56, 6118 (1997).
    [CrossRef]
  7. M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
    [CrossRef]
  8. R. M. Balachandran, N. M. Lawandy, and J. A. Moon, Opt. Lett. 22, 319 (1997).
    [CrossRef] [PubMed]
  9. Dye parameters from Kodak Laser Dyes (Eastman Kodak Company, Rochester, N.Y., 1987)J. M. Drake, R. I. Morse, R. N. Steppel, and D. Young, Chem. Phys. Lett. 35, 181 (1975).

1997 (2)

G. A. Berger, M. Kempe, and A. Z. Genack, Phys. Rev. E 56, 6118 (1997).
[CrossRef]

R. M. Balachandran, N. M. Lawandy, and J. A. Moon, Opt. Lett. 22, 319 (1997).
[CrossRef] [PubMed]

1996 (1)

1995 (2)

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
[CrossRef]

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

1994 (1)

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

1968 (1)

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

Alfano, R. R.

Balachandran, R. M.

R. M. Balachandran, N. M. Lawandy, and J. A. Moon, Opt. Lett. 22, 319 (1997).
[CrossRef] [PubMed]

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

Berger, G. A.

Caufield, H. J.

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

Genack, A. Z.

Gomes, A. S. L.

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

Kempe, M.

Lagendijk, A.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
[CrossRef]

Lawandy, N. M.

R. M. Balachandran, N. M. Lawandy, and J. A. Moon, Opt. Lett. 22, 319 (1997).
[CrossRef] [PubMed]

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

Letokhov, V. S.

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

Moon, J. A.

Noginov, M. A.

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

Noginova, N. E.

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

Sauvain, E.

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

Siddique, M.

van Albada, M. P.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
[CrossRef]

Venkateswarlu, P.

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

Wiersma, D. S.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
[CrossRef]

Nature (London) (2)

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[CrossRef]

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 103 (1995).
[CrossRef]

Opt. Commun. (1)

M. A. Noginov, H. J. Caufield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[CrossRef]

Opt. Lett. (2)

Phys. Rev. E (1)

G. A. Berger, M. Kempe, and A. Z. Genack, Phys. Rev. E 56, 6118 (1997).
[CrossRef]

Sov. Phys. JETP (1)

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

Other (2)

Dye parameters from Kodak Laser Dyes (Eastman Kodak Company, Rochester, N.Y., 1987)J. M. Drake, R. I. Morse, R. N. Steppel, and D. Young, Chem. Phys. Lett. 35, 181 (1975).

See, e.g., P. W. Milonni and J. H. Eberly, eds., Lasers (Wiley, New York, 1988).

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