Acta Photonica Sinica, Volume. 42, Issue 3, 303(2013)
Minimum Center-to-center Separation of Two Dielectric Waveguides
Based on the coupled mode theory, analytical expression of crosstalk per unit length between two dielectric waveguides is derived. The minimum separation and center-to-center separation of two dielectric waveguides under certain crosstalk are defined. The minimum center-to-center separation serves as a measure of waveguide integration. The influences of waveguide size and refractive index difference on the minimum center-to-center separation are investigated. The analysis and simulation results indicate that strongly confined waveguides have small minimum separation and center-to-center separation. Under the condition of large refractive index difference, the minimum separation can be reduced to less than 1 μm. The minimum center-to-center separation has a minimum value for given wavelength and refractive index distribution.
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WANG Ming-yan, SUN Yi-ling, ZHANG Xu-lin. Minimum Center-to-center Separation of Two Dielectric Waveguides[J]. Acta Photonica Sinica, 2013, 42(3): 303
Received: Jun. 25, 2012
Accepted: --
Published Online: Mar. 5, 2013
The Author Email: Ming-yan WANG (wmy@ls0578.net)