Abstract

Single-mode excitation of step-index multimode fibers with light sources with short temporal coherence lengths is demonstrated. Multimode fiber designs with reduced microbending-induced mode coupling are described that allow the propagation of the fundamental mode over long lengths with negligible mode coupling even in the presence of tight fiber bends. At a wavelength of 1.56 µm a fiber with a core diameter of 45 µm can preserve the fundamental mode for a propagation length of 20 m. Such fibers allow coiling with a coil diameter as small as 7  cm.

© 1998 Optical Society of America

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References

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    [CrossRef]

1997 (2)

1996 (1)

1985 (1)

S. B. Poole, D. N. Payne, and M. E. Fermann, Electron. Lett. 21, 737 (1985).
[CrossRef]

1976 (1)

K. Petermann, Arch. Elektron. Übertragungstech. 30, 337 (1976), and references therein.

1975 (3)

1974 (1)

1972 (1)

D. Gloge, Bell Syst. Tech. J 51, 1767 (1972).
[CrossRef]

1971 (1)

1961 (1)

E. Snitzer, Phys. Rev. Lett. 7, 444 (1961).
[CrossRef]

1954 (1)

H. H. Hopkins and N. S. Kapany, Nature (London) 173, 54 (1954).
[CrossRef]

Caplen, J. E.

D. Taverner, D. J. Richardson, L. Dong, J. E. Caplen, K. Williams, and R. V. Penty, Opt. Lett. 22, 378 (1997).
[CrossRef] [PubMed]

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

Dong, L.

D. Taverner, D. J. Richardson, L. Dong, J. E. Caplen, K. Williams, and R. V. Penty, Opt. Lett. 22, 378 (1997).
[CrossRef] [PubMed]

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

Fermann, M. E.

M. E. Fermann, A. Galvanauskas, G. Sucha, and D. Harter, Appl. Phys. B 65, 259 (1997).
[CrossRef]

S. B. Poole, D. N. Payne, and M. E. Fermann, Electron. Lett. 21, 737 (1985).
[CrossRef]

Galvanauskas, A.

M. E. Fermann, A. Galvanauskas, G. Sucha, and D. Harter, Appl. Phys. B 65, 259 (1997).
[CrossRef]

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

Gambling, W. A.

Gloge, D.

D. Gloge, Bell Syst. Tech. J 51, 1767 (1972).
[CrossRef]

D. Gloge, Appl. Opt. 10, 2252 (1971).
[CrossRef] [PubMed]

Griebner, U.

Grunwald, R.

Harter, D.

M. E. Fermann, A. Galvanauskas, G. Sucha, and D. Harter, Appl. Phys. B 65, 259 (1997).
[CrossRef]

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

Hopkins, H. H.

H. H. Hopkins and N. S. Kapany, Nature (London) 173, 54 (1954).
[CrossRef]

Kapany, N. S.

H. H. Hopkins and N. S. Kapany, Nature (London) 173, 54 (1954).
[CrossRef]

Keck, D. B.

Koch, R.

Marcuse, D.

D. Marcuse, Theory of Dielectric Optical Waveguides (Academic, San Diego, Calif., 1974), Chap. 5.

Matsumura, H.

Minelly, J. D.

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

Olshansky, R.

Payne, D. N.

S. B. Poole, D. N. Payne, and M. E. Fermann, Electron. Lett. 21, 737 (1985).
[CrossRef]

W. A. Gambling, D. N. Payne, and H. Matsumura, Appl. Opt. 14, 1538 (1975).
[CrossRef] [PubMed]

Penty, R. V.

Petermann, K.

K. Petermann, Arch. Elektron. Übertragungstech. 30, 337 (1976), and references therein.

Poole, S. B.

S. B. Poole, D. N. Payne, and M. E. Fermann, Electron. Lett. 21, 737 (1985).
[CrossRef]

Richardson, D. J.

Schönnagel, H.

Snitzer, E.

E. Snitzer, Phys. Rev. Lett. 7, 444 (1961).
[CrossRef]

Sucha, G.

M. E. Fermann, A. Galvanauskas, G. Sucha, and D. Harter, Appl. Phys. B 65, 259 (1997).
[CrossRef]

Taverner, D.

Williams, K.

Appl. Opt. (5)

Appl. Phys. B (1)

M. E. Fermann, A. Galvanauskas, G. Sucha, and D. Harter, Appl. Phys. B 65, 259 (1997).
[CrossRef]

Arch. Elektron. Übertragungstech. (1)

K. Petermann, Arch. Elektron. Übertragungstech. 30, 337 (1976), and references therein.

Bell Syst. Tech. J (1)

D. Gloge, Bell Syst. Tech. J 51, 1767 (1972).
[CrossRef]

Electron. Lett. (1)

S. B. Poole, D. N. Payne, and M. E. Fermann, Electron. Lett. 21, 737 (1985).
[CrossRef]

Nature (London) (1)

H. H. Hopkins and N. S. Kapany, Nature (London) 173, 54 (1954).
[CrossRef]

Opt. Lett. (2)

Phys. Rev. Lett. (1)

E. Snitzer, Phys. Rev. Lett. 7, 444 (1961).
[CrossRef]

Other (2)

D. Marcuse, Theory of Dielectric Optical Waveguides (Academic, San Diego, Calif., 1974), Chap. 5.

J. D. Minelly, A. Galvanauskas, D. Harter, J. E. Caplen, and L. Dong, in Conference on Lasers and Electro-Optics, Vol. 11 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 475.

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Figures (2)

Fig. 1
Fig. 1

Setup for measurement of mode coupling in MM fibers. A diffraction-limited source with a short temporal coherence length is coupled into the MM fiber and the mode quality at the end of the MM fiber is determined with a SM dummy fiber.

Fig. 2
Fig. 2

Spectrum of a passively mode-locked SM fiber laser measured before the MM fiber (solid curve) and after the SM dummy fiber (dotted curve). The MM fiber had a length of 3  m wound on a 7-cm drum.

Tables (1)

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Table 1 Mode-Coupling Coefficients D and SM Propagation Lengths in Step-Index MM Fibers of Different Design

Equations (3)

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ηz=1+16d2Dzλ2-1.
D=n22π2CΛ.
Dd8b6λ4.

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