Title :
Intermediate-mode-assisted optical directional couplers via embedded periodic structure
Author :
Vorobeichik, Ilya ; Orenstein, Meir ; Moiseyev, Nimrod
Author_Institution :
Dept. of Chem., Technion-Israel Inst. of Technol., Haifa, Israel
fDate :
9/1/1998 12:00:00 AM
Abstract :
The exchange of power between two identical coupled waveguides with embedded periodic structure along the direction is studied in the framework of Floquet-Bloch theory. A one-period propagator is calculated and a spectrum of its eigenvalues (eigenphases) is studied. We show that due to special symmetry properties of the Floquet-Bloch operator, a strong enhancement or a total suppression of power exchange can he obtained. The power exchange control is realized by the interaction of lowest order waveguide modes with high-order modes. A numerical example is presented in which the beat length is shortened by more than five orders of magnitude
Keywords :
eigenvalues and eigenfunctions; integrated optics; optical directional couplers; optical waveguide theory; Floquet-Bloch operator; Floquet-Bloch theory; beat length shortening; eigenphases; eigenvalues; embedded periodic structure; high-order modes; identical coupled waveguides; integrated optics; intermediate-mode-assisted optical directional couplers; lowest order waveguide modes; one-period propagator; power exchange; symmetry properties; total suppression; umerical example; Directional couplers; Nonlinear optics; Optical filters; Optical modulation; Optical refraction; Optical variables control; Optical waveguides; Periodic structures; Refractive index; Tunneling;
Journal_Title :
Quantum Electronics, IEEE Journal of
