Abstract
We investigate the higher-order supermodes of symmetric buried channel waveguide (BCW) couplers with cores of square, rectangular, and trapezoidal geometries. We show how the cutoff wavelengths of these supermodes can be used to interpret the spectral response of a practical single-mode BCW coupler. Our results highlight the design constraints imposed by second-order supermodes. We also compare the behaviour of these couplers with that of circular-core couplers to illustrate how the geometry of each core affects the coupler cutoff characteristics.
Similar content being viewed by others
References
Hewlett, S.J., F. Ladouçeur and J.D. Love, Opt. Quant. Elec. 27 987, 1995.
Ladouçeur, F. and J.D. Love. Silica-based Buried Channel Waveguides and Devices, Chapman and Hall, London, 1996.
Love, J.D. and A. Ankiewicz. J. Lightwave Tech. 3 100, 1985.
Snyder, A.W. and J.D. Love. Optical Waveguide Theory, Chapman and Hall, London, 1983.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Besley, J.A., Love, J.D., Ladouceur, F. et al. A modal cutoff approach to the study of buried channel waveguide couplers. Optical and Quantum Electronics 34, 317–330 (2002). https://doi.org/10.1023/A:1015040119069
Issue Date:
DOI: https://doi.org/10.1023/A:1015040119069