Academician Nikola Sabotinov presented his new book "The Laser" in "Prof. Marin Drinov" Hall at the Bulgarian Academy of Sciences. The book is devoted to one of the significant Bulgarian achievements in the field of laser science and technology: a copper bromide vapor laser. It was put into operation for the first time by Nikola Sabotinov in 1974 at the Institute of Solid State Physics of BAS. The copper bromide laser has been produced in Bulgaria, Australia and South Korea. For more than 30 years, it has been of interest to the needs of medicine, scientific research and laser technologies. During the study of the laser, a discovery of great importance has been made, indicating that small amounts of hydrogen in its active medium increase [...]