Exact and analytical methods for finding complex roots of moving waveguides with absorbing layers

We present here two methods of analysis of the complex moving waveguide. On e approach is a numerical technique based on Davidenko's method, the other is a perturbation method. Numerical results by Davidenko's method are compa red with these obtained from the perturbation method. It is four.d that the results of the perturbation method are in a good agreement with the numeri cal one. A comparative study of the propagation and attenuation characteris tics of the stationary and moving waveguides has also been investigated and discussed. These results could be used in designing many optical moving se nsors.