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2 March 1993 Mode conversion and large-angle transmission in symmetric multimode Y-junction couplers
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A multimode symmetric Y-junction waveguide is investigated and the optical power transmission and conversion efficiency between the lower and higher modes was calculated. Overlap integrals of the fields of the incident and transmitted guided-wave modes at the Y- junction were used and it is shown that there is a possibility of transmitting up to 29 percent of the incident optical power into the output branching waveguides at very large branching angles. Results show that an appropriate branching angle of the Y-junction can be used to selectively transmit the waveguide modes into the output branches and this can be used advantageously in integrated optic devices. A very simple model using ray optics is developed to explain the results on physical basis. With this simple model we developed a simple framework to interpret the results of the overlap integrals.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Murat Hayri Eskiyerly, Augusto Garcia-Valenzuela, and Massood Tabib-Azar "Mode conversion and large-angle transmission in symmetric multimode Y-junction couplers", Proc. SPIE 1793, Integrated Optics and Microstructures, (2 March 1993);

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