List of Articles Ring resonator Open Access Article Abstract Page Full-Text 1 - A Novel Structure for Optical Channel Drop Filter using Two-Dimensional Photonic Crystals with Square Lattice aram khoshtinat Mohammad Ghiamy Open Access Article Abstract Page Full-Text 2 - A New Design of Photonic Crystal Filter and Power Splitter Based on Ring Resonators رضا قویدل بارساری علیرضا عندلیب حامد علیپور بنایی Open Access Article Abstract Page Full-Text 3 - Design and Simulation 4-Channel Demultiplexer Based on Photonic Crystals Ring Resonators Open Access Article Abstract Page Full-Text 4 - The New Design and Simulation of an Optical Add Drop Filter Based On Hexagonal Photonic Crystal Single Ring Race Track Resonator ابولفضل عباسپور حامد علیپور بنایی علیرضا عندلیب Open Access Article Abstract Page Full-Text 5 - The effect of inner ring radius on frequency and insertion loss of optical filters with ring resonator structure yagoob hasanzade Abdollah Alizadeh Open Access Article Abstract Page Full-Text 6 - Analytical Study of Optical Bi-Stability of a Single-Bus Resonator Based on InGaAs Micro-Ring Array