A Study of the Extraneous Self-Imaging Phenomenon under a Multimode Interference Configuration

Jong-Kyun Hong, Sang-Sun Lee and Seok-Ho Song

J. Korean Phys.Soc. 53,1630 [doi: 10.3938/jkps.53.1630 | PDF Download]

This study analyzes the phase-mismatching values of guided modes in a multimode waveguide with a weak-guiding configuration. In addition, a previously undefined self-imaging phenomenon, referred to herein as the extraneous self-imaging (Ex\_SI) phenomenon, was found to result from the modal phase-mismatching effect. The evolution principle of the Ex\_SI phenomenon is theoretically verified while the results from the numerical method are compared with graphical and analytical forms of the newly suggested method. Moreover, under a specific condition, the numerical results and the analytical results are compared to analyze the evolution of the Ex\_SI phenomenon.