TY - JOUR ID - 15436 TI - Compact All-Optical Encoder Based on Silicon Photonic Crystal Structure JO - Journal of Applied Research in Electrical Engineering JA - JAREE LA - en SN - 2717-414X AU - Makvandi, Mohsen AU - Maleki, Mohammad Javad AU - Soroosh, Mohammad AD - Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz 61357-85311, Iran AD - Faculty of Engineering, Lorestan University, Khorramabad 68151-44316, Iran Y1 - 2022 PY - 2022 VL - 1 IS - 1 SP - 1 EP - 7 KW - Encoder KW - Optical devices KW - Photonic band gap KW - Photonic crystal DO - 10.22055/jaree.2020.31442.1007 N2 - In this paper, a photonic crystal structure composed of the silicon rods is proposed for an all-optical 4*2 encoder. Four input ports are connected to two outputs port via the cross-connections. Different radii of rods as defects are placed in the cross-connection region for coupling the optical waves from the input waveguides to the desired outputs. The total size of the device is about 133 μm2. Plane-wave expansion and finite difference time domain methods are used to calculate the band diagram and simulation of the optical wave propagation inside the structure, respectively. The maximum rise time of the device for all possible states is just about 205 fs which is less than one in the previous works. No need to a bias port and using the same power at input ports are other advantages of this work. The normalized output power margins for logic 0 and 1 are calculated by 2% and 34%, respectively. The simulation results demonstrate the presented structure is capable of using in optical integrated circuits. UR - https://jaree.scu.ac.ir/article_15436.html L1 - https://jaree.scu.ac.ir/article_15436_6e30665a465f05a7f3cf9b09a2c6515e.pdf ER -