Haroon Asghar is a Senior Scientific Officer at the National Centre for Physics (NCP), Islamabad, Pakistan, and an Adjunct Faculty member at the Institute of Space Technology, Islamabad. He received his M.Sc. and M.Phil. degrees in Physics from Quaid-i-Azam University in 2010 and 2012, respectively, and his Ph.D. in Physics from the Department of Physics and Tyndall National Institute, University College Cork, Ireland, in 2018. In 2025, he was a PIFI Visiting Scientist at the Bimberg Chinese-German Center for Green Photonics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences. His Ph.D. research focused on stabilizing self-mode-locked quantum-dash semiconductor lasers using delayed optical feedback and optical injection. He has authored or co-authored 78 peer-reviewed journal articles, 20 international conference papers, and a book chapter, and has delivered numerous invited and contributed talks at national and international conferences. His current research interests include nonlinear optics, nonlinear optical materials, saturable absorbers, fiber lasers, and ultrafast photonics. His work centers on developing and characterizing novel saturable-absorber materials and integrating them into fiber lasers for passive Q-switching and mode-locking. He is also interested in generating and stabilizing ultrashort optical pulses, nonlinear light–matter interactions, and advanced fiber-laser sources for teleco