This paper describes polarization coupling in Ti:LiNbO/sub 3/ waveguides: a source of polarization dependent loss and potentially a source of noise in integrated-optical devices. We are developing a methodology for the fabrication and testing of waveguide lenses made by titanium in-diffusion and proton-exchange in y-cut lithium niobate. One unexpected result of this work has been the observation of polarization coupling in Ti:LiNbO/sub 3/ slab waveguides. When transverse electric field (TE) polarized light is coupled into waveguide modes propagating along the crystal's x-axis, transverse magnetic field (TM) radiation modes radiate from the waveguide sample. Since this polarization coupling occurs for a propagation direction that is along the crystal axis, the observed TM radiation can be distinguished from the TM radiation that would result from leaky modes propagating off-axis in an anisotropic waveguide. When the polarization of the input was changed to TM, we did not observe polarization coupling into TE polarized radiation modes.<>


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    Title :

    Polarization coupling in y-cut titanium in-diffused lithium niobate planar waveguides


    Contributors:

    Published in:

    Publication date :

    1993-01-01


    Size :

    175995 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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