Gnewuch, H., Román, J.E., Harris, R.D., Wilkinson, J.S. and Ulrich, R.
Measurement of complex coupling coefficients of directional coupling by thermo-optic modulation
In Proceedings of Integrated Photonics Research.
Optical Society of America..
Directional coupling between two parallel singlemode optical waveguides is the functional principle underlying numerous integrated optical devices, such as modulators, filters and sensors. As the coupling efficiency depends critically on the synchronism of wave propagation and on the field overlap of the two guides, tight tolerances apply in waveguide fabrication, and a precise determination of the coupling parameters is essential.
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