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

Volume

34

Issue

9

fYear

1998

fDate

9/1/1998 12:00:00 AM

Firstpage

1772

Lastpage

1781

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;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.709596

Filename

709596