Title :
Non-evanescent adiabatic directional coupler
Author :
Kenis, Alexander M. ; Vorobeichik, Ilya ; Orenstein, Meir ; Moiseyev, Nimrod
Author_Institution :
Dept. of Phys., Technion-Israel Inst. of Technol., Haifa, Israel
fDate :
10/1/2001 12:00:00 AM
Abstract :
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
Keywords :
coupled mode analysis; optical directional couplers; optical waveguide theory; periodic structures; adiabatic coupling; adiabatic three-mode coupling; analytical model; copropagating modes; directional coupling mechanism; high-order intermediate mode; mode parameter sensitivity; multimode optical waveguides; nonevanescent adiabatic directional coupler; optical power transfer; periodic structure; scalar wave equation; waveguides; wavelength sensitivity; zero-order optical modes; Directional couplers; Nonlinear optics; Optical coupling; Optical filters; Optical refraction; Optical sensors; Optical surface waves; Optical variables control; Optical waveguides; Partial differential equations;
Journal_Title :
Quantum Electronics, IEEE Journal of
