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Optics Communications

Coherent tunneling by adiabatic process in a four-waveguide optical coupler

Shi Jian, Rui-Qiong Ma, Zuoliang Duan, Meng Liang, Wenwen Zhang, Jun Dong

Published Mar 3, 2016• 4 citations
Publisher
DOI
10.1016/j.optcom.2016.02.058

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We propose an identical geometrical representation scheme for both Landau–Zener (LZ) tunneling process in two-waveguide coupler with a cubically bent structure and stimulated Raman adiabatic passage (STIRAP) in three-waveguide coupler, similar to the geometrical representation of sum frequency process. The results show that although the two-waveguide coupler with a cubically bent axis has not aperiodic structure, it acts as a chirped quasi-phase-matching (QPM) grating and corrects the relative phase between the two supermodes in the curved coupler system. We present a scheme about how to choose the parameters to design the curved beam splitter.
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