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Intermediate-mode-assisted optical directional couplers via embedded periodic structure

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3 Author(s)
Vorobeichik, I. ; Dept. of Chem., Technion-Israel Inst. of Technol., Haifa, Israel ; Orenstein, M. ; Moiseyev, N.

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

Published in:

Quantum Electronics, IEEE Journal of  (Volume:34 ,  Issue: 9 )