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- Anders, Berntson, et al.
(författare)
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Analysis of coherent and incoherent interactions of amplitude shifted solitons in optical fibres
- 1995
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Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 52:5, s. 544-553
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Tidskriftsartikel (refereegranskat)abstract
- Nonlinear interaction between pulses can severely reduce the bit-rate of an optical communication system. One way of reducing this interaction is amplitude shifting of consequtive pulses. In the present work a detailed analytical and numerical investigation is made of the coherent and incoherent interactions between two soliton pulses of unequal amplitudes. For the case of coherent interaction the obtained expressions for the pulse parameters in terms of initial phase and amplitude differences give a clear and explicit prediction of the reduction of the interaction strength for unequal soliton amplitudes. A comparison with numerical simulation results shows good agreement. For the case of incoherent soliton interaction it is found that the dependence of the interaction strength on the amplitude difference is weak.
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| 6. |
- Anders, Berntson, et al.
(författare)
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Analysis of coherent and incoherent interactions of amplitude shifted solitons in optical fibres
- 1998
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Nonlinear interaction between pulses can severely reduce the bit-rate of an optical communication system. One way of reducing this interaction is amplitude shifting of consecutive pulses. In the present work a detailed analytical and numerical investigation is made of the coherent and incoherent interactions between two soliton pulses of unequal amplitudes. For the case of coherent interaction the obtained expressions for the pulse parameters in terms of initial phase and amplitude differences give a clear and explicit prediction of the reduction of the interaction strength for unequal soliton amplitudes. A comparison with numerical simulation results shows good agreement. For the case of incoherent soliton interaction it is found that the dependence of the interaction strength on the amplitude difference is weak.
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- Anders, Berntson, et al.
(författare)
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Power dependence and accessible bandwidth for dispersion-managed solitons in asymmetric dispersion maps
- 1998
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Ingår i: Electronics Letters. - Goteborg, Sweden : Institution of Engineering and Technology. - 0013-5194 .- 1350-911X. ; 34:21, s. 2054-2056
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Tidskriftsartikel (refereegranskat)abstract
- The authors investigate how the parameters of dispersion managed solitons depend on the asymmetry of the dispersion map. Using the variational approach and numerical simulations it is shown that asymmetric maps can increase the accessible bandwidth in the normal average dispersion regime and equalise the power in adjacent WDM channels.
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| 8. |
- Anderson, D., et al.
(författare)
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A variational approach to spherical aberrations in the thermal-wave model for beam dynamics in charged particle accelerators
- 1998
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Ingår i: Physica Scripta. - : Institute of Physics Publishing. - 0031-8949 .- 1402-4896. ; 58:6, s. 608-612
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Tidskriftsartikel (refereegranskat)abstract
- A direct variational approach involving trial functions and Ritz optimization, which has previously been found very useful in nonlinear optics, is applied to analyze the effects of spherical aberrations on the focusing properties of charged particle beams in particle colliders. As compared to conventional perturbation theory, the variational approach provides a simple and physically clear analysis. Explicit expressions are given for the transverse particle beam density, the spot size, and the luminosity reduction factor at the interaction point, in good agreement with the perturbative results.
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- Anderson, D, et al.
(författare)
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Analysis of profile effects on high Q subignited Tokamak fusion plasmas
- 1998
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Ingår i: PHYSICA SCRIPTA. - : ROYAL SWEDISH ACAD SCIENCES. - 0281-1847. ; 58:3, s. 256-261
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- An analysis is made of the maximum power multiplication factor Q, achievble in subignited Tokamak fusion plasmas where the burn is sustained by feedback controlled auxiliary heating. Using a 1-D model equation for the plasma temperature, simple analytical
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| 10. |
- Anderson, D., et al.
(författare)
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Exact Schrödinger Solitons in Optical Fibers in the Presence of Space Dependent Damping or Amplification
- 1999
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Ingår i: Physica scripta. T. - 0281-1847. ; 82, s. 42-43
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that the nonlinear Schrödinger equation describing pulse propagation in optical fibers in the presence of a properly space-tailored damping or amplification is exactly integrable. A simple transformation of variables is given which transforms the inhomogeneous nonlinear Schrödinger equation into the standard form with constant coefficients, thus generating new explicit bright and dark soliton solutions in the cases of anomalous and normal dispersion, respectively.
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