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  • 1
    Electronic Resource
    Electronic Resource
    Characterization and optimization of Ti-diffused LiNbO3 optical waveguides by second diffusion of magnesium (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 187-193 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mg diffusion in Ti-diffused LiNbO3 (Ti/Mg:LiNbO3) optical waveguides has been studied. Secondary ion mass spectrometry has been used to obtain Ti/Mg dopant concentration profiles. Comparison of the diffusion behavior of Mg in pure LiNbO3 and titanium-diffused LiNbO3 (Ti:LiNbO3) has been made. A numerical study, based on semivectorial finite difference method to determine the coupling loss between single-mode fibers and Ti/Mg:LiNbO3 optical waveguides has been performed. It has been demonstrated that the use of Mg can reduce the asymmetry-induced coupling loss to almost zero. A method that predicts the best relative position of the fiber axis with respect to the surface of Ti/Mg:LiNbO3 waveguides has been presented. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360650
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  • 2
    Electronic Resource
    Electronic Resource
    Determination and stability analysis of the supermodes in nonlinear directional couplers through a variational approach (1995)
    Springer
    Optical and quantum electronics 27 (1995), S. 1015-1026 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The even and the odd supermodes of nonlinear directional couplers are determined by means of a variational approach; both slab and channel nonlinear couplers are considered. The validity of the solutions given by the analytical method and their stability properties are analysed through numerical integration of the governing equations. It is shown that channel nonlinear directional couplers improve the stability of the eigenmodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00558493
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Threshold energy of vectorial spatial solitary waves in non-linear quadratic crystals (1998)
    Springer
    Optical and quantum electronics 30 (1998), S. 483-497 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Excitation and propagation of spatial solitary waves due to three-wave mixing in quadratic non-linear media lead to a rich variety of interesting phenomena some of which have already experimental evidence. Analytical and numerical modelling plays a key role in gaining insight in the experimental data, in completing the theoretical understanding of the process and in predicting new possible applications. In this context, we present an extensive analytical and numerical study on the multi-parameter family of vectorial spatial solitary waves in bulk quadratic crystals. We focus our attention particularly on the threshold energy necessary to drive solitary waves on available crystals exhibiting a second order non-linearity and in describing how this threshold depends on the crystal parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006974532171
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  • 4
    Electronic Resource
    Electronic Resource
    Two-dimensional Hamiltonian description of nonlinear optical waveguides (1994)
    Springer
    Optical and quantum electronics 26 (1994), S. S335 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstact We present a general method for studying the evolution of a beam propagating in a nonlinear optical waveguide. In the framework of a variational method, and within the Ritz optimization technique, the governing equations describing the evolution of the basic parameters of the beam are reduced to those of a Hamiltonian dynamical system. As a particular case the method yields the guided modes of the device (corresponding to fixed points of the dynamical system). As an example the method is applied to the full two-dimensional analysis of the guided modes of a nonlinear slab directional coupler and of a channel waveguide; numerical experiments are used to validate our approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384684
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    Paper (German National Licenses)
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