List of Articles Directional coupler Open Access Article Abstract Page Full-Text 1 - Waveguide-Type Directional Coupler Based on Substrate Integrated Waveguide (SIW) Zohreh Pourgholamhossein Reza Safian Open Access Article Abstract Page Full-Text 2 - Design of Photonic Crystal Polarization Splitter on InP Substrate Mahmoud Nikoufard Masoud Kazemi Alamouti Open Access Article Abstract Page Full-Text 3 - PhC-based Majority Gate using a nonlinear directional coupler Reyhaneh Rigi Keivan Navi Hojjat Sharifi 10.30495/jopn.2022.28130.1225