.Low loss optical waveguide crossing based on octagonal resonant cavity coupling[J].Optoelectronics Letters,2009,5(3):198-201 Low loss optical waveguide crossing based on octagonal resonant cavity coupling Mohd.Zahed M.Khan Electronics and Electrical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia ? Abstract:       A waveguide crossing utilizing a high index contrast material system is presented. The structure is based on coupling with an octagonal resonant cavity inscrted at the waveguide junction. It also employs four identical square metal strips placed at the four comers of the waveguide crossing. The spectral response of the structure calculated using the method of line numerical technique, in general, shows a high power transmission in the forward arm with sufficiently low crosstalk and fraction of radiated power. Hits: 3808 Download times: 202 View Full Text    Download reader