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The Bragg reflection waveguide directional coupler

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2 Author(s)
Salzman, Joseph ; Dept. of Electr. Eng., Technion-Israel Inst. of Technol., Haifa, Israel ; Lenz, Gadi

A directional coupler formed by two Bragg reflection waveguides (BRWs) with a common finite periodic region between them is analyzed. The coupling coefficient is a sensitive function of the index difference in the periodic coupling section. This feature can lead to a novel kind of electrooptic switch. In addition, the BRW directional coupler exhibits dispersion properties characteristic of the periodic bounding media, which can be used to implement a narrowband wavelength filter and a TE polarizer.

Published in:

Photonics Technology Letters, IEEE  (Volume:1 ,  Issue: 10 )