1 April 1994 Large-angle transmission and mode conversion characteristics of symmetric multimode Y-junction couplers
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Abstract
We investigated the optical power transmission and conversion efficiency between the lower and higher modes in a multimode symmetric Y-junction waveguide. Using the overlap integrals of the fields of the incident and transmitted guided-wave modes at the Y junction, we obtained a first-order approximation of the transmission characteristics and found that there is a possibility of transmitting a useful amount of the incident optical power into the output branching waveguides at very large branching angles. Results showed that an appropriate branching angle of the Y junction can be used to selectively transmit the waveguide modes into the output branches. We developed a very simple model using ray optics to explain the results on a more intuitive basis.
Augusto Garcia-Valenzuela, Murat Hayri Eskiyerly, Massood Tabib-Azar, "Large-angle transmission and mode conversion characteristics of symmetric multimode Y-junction couplers," Optical Engineering 33(4), (1 April 1994). https://doi.org/10.1117/12.166932
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