Fig. 3. The laser efficiency and the corresponding laser emission wavelength
(shown within the brackets) as a function of the thulium concentration.

Tm Concentration [wt%]		Laser Efficiency [%]
	2.0000				58.0000
	2.5100				60.0000
	3.0000				62.0000
	3.5100				70.0000
	3.8200				71.0000
	5.6400				72.0000