Mohammed, Faraqid, and Tahreer Mansour. “Design and Implementation Tunable Band Pass Filter Based on PCF-Air Micro-Cavity FBG Fabry-Perot Resonator”. Iraqi Journal of Laser 18, no. 1 (February 12, 2019): 13-23. Accessed November 17, 2019. http://ijl.uobaghdad.edu.iq/index.php/IJL/article/view/186.