List of Articles Multiplexer Open Access Article Abstract Page Full-Text 1 - Design and Simulation of a Waveguide Division De-multiplexer (DWDM) for Communication Application Yadollah Shahamat Mohammad Vahedi Open Access Article Abstract Page Full-Text 2 - The Introduction of a Heuristic Mutation Operator to Strengthen the Discovery Component of XCS Ahmad Reza Pakraei Kamal Mirzaie Open Access Article Abstract Page Full-Text 3 - All optical digital multiplexer using nonlinear photonic crystal ring resonators Bahman Elyasi Sahel Javahernia 10.30495/jopn.2022.29174.1242 Open Access Article Abstract Page Full-Text 4 - Novel Four-Channel All Optical Demultiplexer Based on Square PhCRR for Using WDM Applications Vahid Fallahi Mahmood Seifouri