The slope efficiency of the continuous-wave chromium-doped forsterite (Cr:Mg2SiO4) laser has been measured by using four different output mirrors. The maximum slope efficiency of 38% was achieved with an 11% output coupler. The extrapolated limiting slope efficiency in the absence of passive losses is estimated to be 65%. This value corresponds to an intrinsic quantum efficiency of 77%, which is similar to the efficiencies determined for mature tunable solid-state laser systems.
© 1991 Optical Society of America
Original Manuscript: December 3, 1990
Published: June 1, 1991
V. Petričević, A. Seas, and R. R. Alfano, "Slope efficiency measurements of a chromium-doped forsterite laser," Opt. Lett. 16, 811-813 (1991)