Assistant Professor Dr. Hisham Kazem Hashem, a lecturer at the College of Engineering at the University of Basrah, with the participation of researchers from UPM University in Malaysia and King Saud University in the Kingdom of Saudi Arabia, published a scientific research in the Journal of Optical Technology, which is one of the magazines classified within Scopus containers and specialized in The field of optical communication engineering in the American Publishing House of Communication Engineering Research Optical Society of America (OSA) Titled Parametric study of the transient period properties of distributed feedback laser diodes. The research presents the design of the laser DFB modifier that reduces the transient time and increases the data transmission speed. The results presented by the research are very important in the field of developing transmission speed in communication networks.