A GENERAL RULE FOR DESIGNING MULTIBRANCH HIGH-ORDER MODE CONVERTER

We propose a general rule that can be used to design multibranch high-order mode converters. We used the modal theory to analyze the proposed structure rigorously and presented the general principles. The well-established flnite-difierence beam propagation method was used to simulate the proposed device. The numerical results show that the proposed devices could really function as the all- optical mode converter device. It would be developed to quantify the applications and beneflts in applications of optical signal processing and computing systems.