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Characterization and performance evaluation of coupled multiwaveguide arrays

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2 Author(s)
Kaplan, A. ; Fac. of Eng., Tel Aviv Univ., Israel ; Ruschin, S.

A new and effective nonintrusive method for characterization of N coupled waveguides is presented. The method is able to furnish readily the coupling parameters of most significance, and furnishes in addition, a way of assessment of overall device quality and performance. The procedure is based on a semi-empirical implementation of coupled mode theory, by means of which different functions are defined for different input configurations. In a well-functioning device, all these function should attain a common single minimum, out of which the coupling coefficient and additional parameters of the device are deduced. Devices were fabricated on Z-cut LiNbO3 crystals by in-diffusion of titanium. The method was applied in order to measure the wavelength and polarization dependence of the coupling coefficient

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Lightwave Technology, Journal of  (Volume:17 ,  Issue: 10 )