Abstract
In recent years, laser emitters have developed rapidly, been used in many fields, and have also brought great development to many industries such as communications and medical treatment. Thulium as a rare earth ion has a long service life and laser conversion efficiency, so the study of thulium-doped fiber lasers is of great significance for the development of the laser industry, but there is still a gap in the research in the field of 1900nm thulium-doped fiber lasers, Therefore, this experiment uses the physical model and quantum electric model to study 1900nm thulium-doped fiber lasers. The conclusion that the pump optical power decreases with the increase of distance and the pump optical power increases with the increase of laser power is processed, and the relationship between the pump optical power and the laser power, the relationship between the distance length and the pump optical power and the lasing optical power is shown with images.
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