Title :
An efficient 1.46 μm thulium fiber laser via a cascade process
Author :
Allen, R. ; Esterowitz, L. ; Aggarwal, I.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
2/1/1993 12:00:00 AM
Abstract :
Continuous wave (CW) lasing in a thulium-doped fluorozirconate fiber at 1.46 μm with a 20% slope efficiency was observed. Simultaneous lasing at 1.86 μm with 29% slope efficiency depopulates the normally long lived 1.46-μm terminal level. It is shown that the cascade process can increase the slope efficiency ηs, of the 1.45-μm transition by a factor of ten and the 1.86-μm transition by a factor of eight. Calculations indicate that the CW laser thresholds decrease significantly
Keywords :
fibre lasers; laser transitions; thulium; 1.46 micron; 1.86 micron; 20 percent; 29 percent; CW lasing; ZBLAN:Tm; ZrF4-BaF2-LaF3-AlF3-NaF:Tm; cascade process; efficient Tm fibre laser; long lived terminal level; slope efficiency; thresholds; Energy states; Fiber lasers; Glass; Helium; Laser excitation; Laser transitions; Optical fibers; Pump lasers; Quantum cascade lasers; Stationary state;
Journal_Title :
Quantum Electronics, IEEE Journal of
