en عمومى General پژوهشي Research <div style="text-align: justify;">In this paper, we proposed an all optical 4-to-2 encoder that has 4 input and 3 output ports. This device generates a 2 bit binary code based on which input port is active. We used nonlinear photonic crystal ring resonators along with optical power splitter for realizing the proposed encoder. In this device the switching rate and area are obtained about 333 GHz and 612&micro;m² respectively.</div> Kerr effect, Optical encoder, Photonic bandgap, Photonic crystal. 119 126 http://ijop.ir/browse.php?a_code=A-10-583-3&slc_lang=en&sid=1 Fatemeh Hadadan fhadadan@yahoo.com 10031947532846002676 10031947532846002676 No Department of Electrical Engineering, Shahid Chamran University of Ahvaz, Mohammad Soroosh m.soroosh@scu.ac.ir 10031947532846002677 10031947532846002677 Yes Department of Electrical Engineering, Shahid Chamran University of Ahvaz,