Title :
Efficient thulium-doped 2-μm germanate fiber laser
Author :
Jianfeng Wu ; Shibin Jiang ; Tao Luo ; Jihong Geng ; Peyghambarian, N. ; Barnes, N.P.
Author_Institution :
Npphotonics Inc., Tucson, AZ, USA
Abstract :
We report an efficient fiber laser operating near 2 μm. The glass for the fiber is germanate that is highly doped with thulium. The effect of cross relaxation energy transfer between thulium ions as observed from emission spectrum of the glass samples results in the laser having a very high slope efficiency of 58% with respect to launched power. This corresponds to a quantum efficiency of 1.79, indicating that each pump photon leads to near 1.8 excited Tm/sup 3+/ ions.
Keywords :
fibre lasers; germanate glasses; laser transitions; optical glass; optical pumping; thulium; 1.79 percent; 2 mum; 58 percent; GeO:Tm; cross relaxation energy transfer; pump photon; quantum efficiency; slope efficiency; thulium-doped germanate fiber laser; Absorption; Doping; Energy exchange; Fiber lasers; Glass; Laser excitation; Laser transitions; Optical fibers; Pump lasers; Quantum well lasers; Germanate glass; optical fiber lasers; slope efficiency; thulium;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.861970
