Research Papers

Evaluation of performance of a hybrid electro-optic directional coupler and a Mach–Zehnder switch

[+] Author Affiliations
Edgars Nitiss

University of Latvia, Institute of Solid State Physics, Riga, Latvia

J. Nanophoton. 11(1), 016013 (Mar 09, 2017). doi:10.1117/1.JNP.11.016013
History: Received November 14, 2016; Accepted February 21, 2017
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Abstract.  The efficiency of an electro-optic (EO) directional coupler (DC) and a Mach–Zehnder (MZ) switch is discussed. The specific designs employ a passive waveguide core and an EO cladding. The performance of a DC switch was evaluated by numerical methods, namely coupled mode theory (CMT), eigenmode expansion (EME) method, and beam envelope method. Using the CMT and EME methods, it is shown that in the DC with a passive waveguide core and EO cladding at certain waveguide parameters the switching effect does not take place. The effect is demonstrated for the first time and suggests that careful optimization of the DC switch should be done before experimental realization of the device. The efficiency of an optimized DC switch is shown to be of an order lower than that of an MZ switch.

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Citation

Edgars Nitiss
"Evaluation of performance of a hybrid electro-optic directional coupler and a Mach–Zehnder switch", J. Nanophoton. 11(1), 016013 (Mar 09, 2017). ; http://dx.doi.org/10.1117/1.JNP.11.016013


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