Abstract

Numerical simulations are used to investigate soliton-like propagation in tapered silicon core optical fibers. The simulations are based on a realistic tapered structure with nanoscale core dimensions and a decreasing anomalous dispersion profile to compensate for the effects of linear and nonlinear loss. An intensity misfit parameter is used to establish the optimum taper dimensions that preserve the pulse shape while reducing temporal broadening. Soliton formation from Gaussian input pulses is also observed—further evidence of the potential for tapered silicon fibers to find use in a range of signal processing applications.

© 2010 Optical Society of America

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M. Lipson, Nanotechnol. 15, S622 (2004).
[CrossRef]

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R. P. Kenny, T. A. Birks, and K. P. Oakly, Electron. Lett. 27, 1654 (1991).
[CrossRef]

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R. A. Soref and B. R. Bennett, IEEE J. Quantum Electron. 23, 123 (1987).
[CrossRef]

K. Tajima, Opt. Lett. 12, 54 (1987).
[CrossRef] [PubMed]

1983 (1)

1982 (1)

1980 (1)

H. H. Li, J. Phys. Chem. Ref. Data 9, 561 (1980).
[CrossRef]

Agrawal, G. P.

Badding, J. V.

Bennett, B. R.

R. A. Soref and B. R. Bennett, IEEE J. Quantum Electron. 23, 123 (1987).
[CrossRef]

Birks, T. A.

R. P. Kenny, T. A. Birks, and K. P. Oakly, Electron. Lett. 27, 1654 (1991).
[CrossRef]

Boyd, R. W.

DeLong, K. W.

Evans, A. F.

Fauchet, P. M.

Fittinghoff, D. N.

Hasegawa, A.

Healy, N.

Kenny, R. P.

R. P. Kenny, T. A. Birks, and K. P. Oakly, Electron. Lett. 27, 1654 (1991).
[CrossRef]

Kodama, Y.

Ladera, C. L.

Li, H. H.

H. H. Li, J. Phys. Chem. Ref. Data 9, 561 (1980).
[CrossRef]

Lin, Q.

Lipson, M.

M. Lipson, Nanotechnol. 15, S622 (2004).
[CrossRef]

Oakly, K. P.

R. P. Kenny, T. A. Birks, and K. P. Oakly, Electron. Lett. 27, 1654 (1991).
[CrossRef]

Peacock, A.

Peacock, A. C.

Piredda, G.

Sazio, P. J. A.

Soref, R. A.

R. A. Soref and B. R. Bennett, IEEE J. Quantum Electron. 23, 123 (1987).
[CrossRef]

Sparks, J. R.

Stentz, A. J.

Tajima, K.

Trebino, R.

Yin, L.

Zhang, J.

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Figures (3)

Fig. 1
Fig. 1

(a) GVD and (b) effective mode area as functions of the silicon fiber core diameter.

Fig. 2
Fig. 2

Soliton evolution in a 10 mm taper: (a) normalized profiles and (b) FWHM (solid curve) compared to an untapered fiber (dashed curve), taper with no loss (dashed-dotted curve), and taper with linear loss (circles). (c) FWHM over 20 mm in a taper (solid curve) and an untapered fiber (dashed curve).

Fig. 3
Fig. 3

(a) Temporal and (b) spectral profiles following soliton propagation in a silicon taper (solid curves); hyperbolic secant fits (circles). (c) and (d) Outputs following soliton formation from a Gaussian input pulse (solid curve), hyperbolic secant (circles), and Gaussian (dashed curve) fits.

Equations (3)

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A z = i β 2 ( z ) 2 2 A t 2 + β 3 ( z ) 6 3 A t 3 + i γ ( z ) | A | 2 A 1 2 ( σ f + α l ) A ,
N c ( z , t ) t = β TPA 2 h ν 0 | A ( z , t ) | 4 A eff 2 N c ( z , t ) τ c ,
ε I ( z ) = { 1 N j = 1 N [ | A ( z , t j ) | 2 | U ( z , t j ) | 2 ] 2 } 1 / 2 .

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