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期刊论文
Structure with improved self-imaging in its graded-index multimode interference region
Yin et al. 19, (6) 1301～1303，-0001，（）：
Propagation constant errors (PCEs) of guided modes in regions of multimode interference in optical networks were analyzed. Results show that a graded-index waveguide can effectively decrease the PCEs. An example based on an exponential function is presented. Numerical results show that addition of a graded-index waveguide greatly improves device performance in this structure.
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