Endpumped

Endpumped refers to a configuration in laser technology where the pump source is directed into the laser gain medium from one of its ends. This is a common method for optically pumping solid-state lasers. In an endpumped laser, the pump beam is typically focused through a transparent end face of the gain medium, such as a crystal or a semiconductor. The pump light is absorbed by the gain medium, exciting its atoms or molecules to a higher energy state, which then allows for laser emission when stimulated. This pumping geometry offers several advantages over side-pumping methods, including better overlap between the pump and laser modes, leading to higher efficiency and lower threshold pump power. It also allows for more precise control of the pump beam's spatial profile. Endpumped lasers are widely used in applications requiring high beam quality, low noise, and compact designs, such as in scientific research, spectroscopy, and some industrial processes. The specific wavelengths of the pump laser and the absorption characteristics of the gain medium are crucial factors in optimizing the performance of an endpumped laser system.