EventDr. Mustafa Ordu
Mid-infrared Fibers and Fiber/Glass Micromachining with Femtosecond Lasers
Silica based glasses have been used extensively for optical fiber drawing since 1970s. They are cheap, amenable to fiber drawing, and exhibit low transmission losses for a wide optical window that spans from ultraviolet to near-infrared region. Starting from mid-infrared region, the transmission of silica fibers decreases with increasing wavelength and eventually they become opaque to light transmission. On the other hand, mid-infrared radiation has a strong potential for important applications such as remote laser delivery, chemical sensing and countermeasure defense technologies. Semiconductors are one of the promising candidates for mid-IR fibers due to their favorable bulk mechanical and optical properties. The first part of this seminar, presents the fabrication and characterization of Ge, Si and Ge-Si alloy-core glass-cladded fibers.
Lasers have been used for machining various materials including metals, ceramics and glasses. The utilization of ultrashort pulses is an attractive option for submicron machining in favor of minimal material damage, high precision and speed. The potential of laser micromachining with femtosecond pulses have attracted significant attention of many research laboratories and laser companies. Several processes such as welding, etching, cutting and drilling that are performed on glasses by femtosecond lasers can further be applied to glass fibers. My current project focuses on micromachining of hollow core photonic crystal fibers (HC-PCF) and glass plates with femtosecond pulsed lasers. The second part of this seminar presents the preliminary results of fiber/glass micromachining and future studies on femtosecond laser machining.
About The Speaker
Dr. Mustafa received a B.S. and an M.S. degree in Mechanical engineering from Istanbul Technical University, Turkey and Tohoku University, Japan, respectively. He obtained his Ph.D. degree from Boston University in 2018 on fabrication and characterization of semiconductor-core glass fibers for mid-infrared optical transmission. He is currently a postdoctoral researcher at XLIM Research Institute in Limoges, France. His current research is focused on micromachining with femtosecond lasers and photonic crystal fiber drawing.