| 1. |
- Anders, Berntson, et al.
(författare)
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Self-phase modulation in dispersion compensated optical fibre transmission systems
- 1996
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Ingår i: Optics Communications. - : Elsevier. - 0030-4018 .- 1873-0310. ; 130:1-3, s. 153-162
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Tidskriftsartikel (refereegranskat)abstract
- An analysis is made of the influence of self-phase modulation on optical fibre communication systems where the chromatic dispersion is compensated for by a dispersion compensation fibre. In particular we derive a simple and useful expression for the optimal fibre length in the presence of nonlinearities.
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| 2. |
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| 3. |
- Boyer, Gilbert, et al.
(författare)
-
Four-wave mixing of femtosecond pump-probe pulses in optical fibers
- 1999
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Ingår i: Nonlinear Guided Waves and Their Applications.
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Konferensbidrag (refereegranskat)abstract
- The nonlinear propagation of a pump-probe pulse pair in an optical fiber has been extensively studied both experimentally, numerically and theoretically. In particular, it has been shown that the probe can attain a spectral shift under the influence of cross-phase modulation (XPM) from the pump, an effect having important applications in e. g. optical switching and demultiplexing.
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| 4. |
- Hall, Björn, 1973, et al.
(författare)
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Pump-probe collision in optical fibers : Four-wave-mixing induced frequency jump
- 2001
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Ingår i: Journal of the Optical Society of America. B, Optical physics. - : Optical Society of America (OSA). - 0740-3224 .- 1520-8540. ; 18:11, s. 1652-1658
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Tidskriftsartikel (refereegranskat)abstract
- An investigation is made of ultrafast pump-probe pulse collisions near the zero-dispersion wavelength in an optical single-mode fiber. A steplike probe frequency shift is observed when the pump power is gradually increased. The magnitude of this frequency jump is shown to depend on the phase difference between the pulses. This new effect is investigated numerically and experimentally and is attributed to four-wave mixing.
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| 5. |
- Karlsson, Magnus, 1967, et al.
(författare)
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A variational approach to optical soliton collisions
- 1994
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Ingår i: Physica Scripta. - : IOP Publishing. - 1402-4896 .- 0031-8949. ; 50:3, s. 265-270
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Tidskriftsartikel (refereegranskat)abstract
- The mathematical analogy between the nonlinear Schrödinger equations describing propagation of temporal soliton pulses in optical fibres, and propagation of spatial soliton beams in planar optical wave guides is discussed. A straightforward variational method, based on trial functions and Rayleigh-Ritz optimization, is demonstrated and applied to incoherent interaction of solitons. We study incoherent soliton interaction in a wavelength-multiplexed optical-fibre communication system, as well as the analogous problem for crossed optical beams in a planar waveguide. The predictions of the variational approach are also shown to be in good agreement with numerical simulation results and with experiments.
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| 6. |
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| 7. |
- Karlsson, Magnus, 1967, et al.
(författare)
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Dynamics of self-focusing and self-phase modulation in a parabolic index optical fiber.
- 1992
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Ingår i: Optics Letters. - 0146-9592 .- 1539-4794. ; 17:1, s. 22-24
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Tidskriftsartikel (refereegranskat)abstract
- The dynamics that result from the combined effects of spatial diffraction, nonlinearity, and a parabolic graded index for wave propagation in optical fibers are presented. An approximate analytical solution of the nonlinear Schrödinger equation in a graded-index fiber is obtained by using a variational approach. Particular emphasis is put on the variation of both the pulse width and the longitudinal phase delay with the distance of propagation along the fiber.
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| 8. |
- Karlsson, Magnus, 1967, et al.
(författare)
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Super-Gaussian approximation of the fundamental radial mode in nonlinear parabolic-index optical fibers
- 1992
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Ingår i: Journal of the Optical Society of America B: Optical Physics. - 1520-8540 .- 0740-3224. ; 9:9, s. 1558-1562
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Tidskriftsartikel (refereegranskat)abstract
- Using a direct variational technique involving super-Gaussian trial functions, we find approximate solutions for the fundamental radial mode of an optical wave propagating in a nonlinear parabolic-index fiber. A detailed examination is made of the amplitude, width, radial profile, and longitudinal phase shift of the stationary solutions that represent a two-dimensional balance among diffraction, nonlinear self-focusing, and linear wave guiding. For pulse powers below the self-focusing power, the stationary solutions are stabilized by the parabolic index variation.
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