• praseodymium
• rare earth laser
• single frequency laser
• solid state laser
• ultra narrow laser

Since their first demonstration, special efforts have been made on the understanding and development of the Rare-Earth based SSL. The result is that nowadays so many wavelengths are available (from direct emission or via frequency-doubling/tripling processes) covering almost the entire visible and near-infrared parts of the light spectrum with power scalability, beam quality, frequency narrowness and stability, wall-plug efficiencies; not obtainable by any other laser technology.
The work done concern various laser tests of a LLF:Pr sample growth by the research team led by Prof. Mauro Tonelli in Pisa.
Therefore, the design of the laser cavities and the tests themselves were conducted at Fraunhofer UK's laboratories, as well as all the lab. equipment, provided by the same company.
In greater detail, the tests done investigate behavior in frequency (single longitudinal mode operation, narrowness and stability) of the laser operating at a couple of wavelengths (with natural extension to all the other emission lines), not before analyzing the system in terms of emission power, beam quality and efficiency.