Abstract

We show that the reduction in visibility of the speckle pattern obtained from laser light that has been passed through a step-index light guide can be found from a knowledge of the model dispersion of the guide, and the bandwidth of the laser beam.

© 1976 Optical Society of America

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References

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  1. H. Takahara, Appl. Opt. 15, 609 (1976).
    [Crossref] [PubMed]
  2. B. Crosignani and P. Di Porto, J. Appl. Phys. 44, 4616 (1973).
    [Crossref]
  3. B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
    [Crossref]
  4. B. Crosignani and P. Di Porto, in Proceedings of the SPIE/SPSE Technical Symposium East, Vol. 77 (Reston, Virginia, 1976).

1976 (1)

1974 (1)

B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
[Crossref]

1973 (1)

B. Crosignani and P. Di Porto, J. Appl. Phys. 44, 4616 (1973).
[Crossref]

Crosignani, B.

B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
[Crossref]

B. Crosignani and P. Di Porto, J. Appl. Phys. 44, 4616 (1973).
[Crossref]

B. Crosignani and P. Di Porto, in Proceedings of the SPIE/SPSE Technical Symposium East, Vol. 77 (Reston, Virginia, 1976).

Daino, B.

B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
[Crossref]

Di Porto, P.

B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
[Crossref]

B. Crosignani and P. Di Porto, J. Appl. Phys. 44, 4616 (1973).
[Crossref]

B. Crosignani and P. Di Porto, in Proceedings of the SPIE/SPSE Technical Symposium East, Vol. 77 (Reston, Virginia, 1976).

Takahara, H.

Appl. Opt. (1)

J. Appl. Phys. (1)

B. Crosignani and P. Di Porto, J. Appl. Phys. 44, 4616 (1973).
[Crossref]

Opt. Commun. (1)

B. Crosignani, B. Daino, and P. Di Porto, Opt. Commun. 11, 178 (1974).
[Crossref]

Other (1)

B. Crosignani and P. Di Porto, in Proceedings of the SPIE/SPSE Technical Symposium East, Vol. 77 (Reston, Virginia, 1976).

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Figures (4)

FIG. 1
FIG. 1

Speckle pattern on the exit face of a fiber 30 m long, 45 μm in diameter, and with n1 ≃ 1.54, n2 ≃ 1.51, for a bandwidth δf = 0.2 GHz.

FIG. 2
FIG. 2

Speckle pattern for δf = 0.5 GHz.

FIG. 3
FIG. 3

Speckle pattern for δf =2 GHz.

FIG. 4
FIG. 4

Speckle pattern for δf = 10 GHz.

Equations (2)

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τ = L n 1 ( n 1 - n 2 ) / ( c n 2 ) ,
L c = c n 2 t c n 1 ( n 1 - n 2 ) c n 2 n 1 ( n 1 - n 2 ) δ f .