Abstract

The linewidth of laser emission in random-scattering gain media is found to be broadened as the number of scatterers increases. This broadening is attributed to the reduction of amplification by stimulated emission as a result of the shortened total path length traversed by the backscattered light in a highly scattering medium. In addition, the spectral shift of the emission peak is found to depend on the dye concentration and the pumping power.

© 1995 Optical Society of America

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References

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  1. N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
    [CrossRef] [PubMed]
  2. A. Z. Genack, J. M. Drake, Nature (London) 368, 400 (1994).
    [CrossRef]
  3. M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
  4. R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

1994 (1)

A. Z. Genack, J. M. Drake, Nature (London) 368, 400 (1994).
[CrossRef]

1967 (1)

R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

Alfano, R. R.

M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.

Ambartsumyan, R. V.

R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

Balachandran, R. M.

N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
[CrossRef] [PubMed]

Drake, J. M.

A. Z. Genack, J. M. Drake, Nature (London) 368, 400 (1994).
[CrossRef]

Genack, A. Z.

A. Z. Genack, J. M. Drake, Nature (London) 368, 400 (1994).
[CrossRef]

Gomes, A. M. L.

N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
[CrossRef] [PubMed]

Kryukov, P. G.

R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

Lawandy, N. M.

N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
[CrossRef] [PubMed]

Letokhov, V. S.

R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

Petricevic, V.

M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.

Sauvain, E.

N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
[CrossRef] [PubMed]

Siddique, M.

M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.

Wang, Q. Z.

M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.

Nature (1)

A. Z. Genack, J. M. Drake, Nature (London) 368, 400 (1994).
[CrossRef]

Sov. Phys. JETP (1)

R. V. Ambartsumyan, P. G. Kryukov, V. S. Letokhov, Sov. Phys. JETP 24, 1129 (1967).

Other (2)

N. M. Lawandy, R. M. Balachandran, A. M. L. Gomes, E. Sauvain, Nature (London) 368, 436 (1994); R. M. Balachandran, N. M. Lawandy, D. P. Pacheco, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.
[CrossRef] [PubMed]

M. Siddique, V. Petricevic, Q. Z. Wang, R. R. Alfano, presented at Optical Society of America Annual Meeting, Dallas, Tex., October 2–7, 1994.

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Figures (4)

Fig. 1
Fig. 1

Emission spectra from a solution of 2.5 × 10−3 M Rhodamine B in methanol with a suspension of 0.27-μm TiO2 particles of various number densities: (a) 0, (b) 0.3, (c) 1.8, and (d) 30 (in units of 1010 cm−3).

Fig. 2
Fig. 2

Linewidth of the lasing emission from a 2.5 × 10−3 M solution of Rhodamine B in methanol as a function TiO2 particle concentration.

Fig. 3
Fig. 3

The spectral peak of the lasing emission from a 2.5 × 10−3 M solution of Rhodamine B in methanol as a function TiO2 particle concentration.

Fig. 4
Fig. 4

Temporal profiles of the backscattered ultrashort laser pulse from random media of different transport mean free paths (in micrometers).

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