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Non-evanescent adiabatic directional coupler

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4 Author(s)
Kenis, A.M. ; Dept. of Phys., Technion-Israel Inst. of Technol., Haifa, Israel ; Vorobeichik, I. ; Orenstein, M. ; Moiseyev, N.

A directional coupling mechanism based on an adiabatic coupling between three optical modes is suggested. The optical power transfer between two waveguides which are far apart is mediated by adiabatic coupling between zero-order optical modes of the individual waveguides and a high-order intermediate mode. The analytical model for an adiabatic three-mode coupling based on a scalar wave equation is presented. The directional coupling via the adiabatic mode coupling between copropagating modes is described and compared with a nonadiabatic directional coupling assisted by periodic perturbation. It is shown that adiabatic directional coupling has much less sensitivity to the mode parameters and to the wavelength

Published in:

Quantum Electronics, IEEE Journal of  (Volume:37 ,  Issue: 10 )