1 May 2014 Three port optical circulators with ring resonators
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We present a concept for a circulator that has the same bandwidth efficiency as a photonic crystal circulator but which relies on a ring resonator and thereby is experimentally much easier to realize. We achieve this by side coupling three waveguides to the ring resonator. The desired standing wave pattern which recreates the photonic crystal type circulator spectrum is realized by exciting both the clockwise and counter-clockwise traveling wave through a Bragg reflector.
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Dirk Jalas, Dirk Jalas, Alexander Yu. Petrov, Alexander Yu. Petrov, Manfred Eich, Manfred Eich, } "Three port optical circulators with ring resonators", Proc. SPIE 9133, Silicon Photonics and Photonic Integrated Circuits IV, 913316 (1 May 2014); doi: 10.1117/12.2052515; https://doi.org/10.1117/12.2052515

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