List of Articles Hoseein Emami Article 1 - Design of an All- Optic Communication Filter Based on Photonic Crystal Structure Majid Malekian Hossein Emami Mohsen Ashourian Majlesi Journal of Telecommunication Devices , Issue 23 , Year , Summer 2017 Article 2 - Design and Simulation of Metro Ethernet Using Optical System Alireza Emamjomeh Hossein Emami Ali Hashemi Talkhounche Majlesi Journal of Telecommunication Devices , Issue 11 , Year , Summer 2014 Article 3 - Investigation of Effective Parameters for Improvement of OSNR and Increasing of the Channel Capacity in Optical Communication Systems Majid Malekian Hossein Emami Mohsen Ashourian Majlesi Journal of Telecommunication Devices , Issue 24 , Year , Autumn 2017