Title :
On the dynamics of population inversion for 3 μm Er3+ lasers
Author :
Lupei, Voicu ; Georgescu, Serban ; Florea, V.
Author_Institution :
Inst. of Atomic Phys., Bucharest, Romania
fDate :
2/1/1993 12:00:00 AM
Abstract :
A generalized model for 3-μm (4I11/2 →4I13/2)Er lasers is proposed. The essential energy transfer processes present in the single-doped Er 3+ systems (up-conversion from 4I13/2, up-conversion from 4 I11/2, cross-relaxation from 4S 3/2), as well as those present in Cr3+ codoped Er 3+ systems, are taken into account. In the frame of this model, the main features of 3 μm Er3+ lasers, such as long pulse or CW operation, the change of emission wavelength as a function of pumping conditions, and the effects of codoping with Ho3+ or Tm3+ ions, are explained
Keywords :
erbium; laser theory; laser transitions; optical pumping; population inversion; solid lasers; 3 micron; CW operation; Cr3+ codoping; Er3+ doped crystals; Er3+ lasers; Ho3+ codoping; Tm3+ codoping; YAG:Er3+; YAl5O12:Er; YScGG:Er3+; YScGa5O12:Er; cross-relaxation; emission wavelength; energy transfer processes; generalized model; long pulse; population inversion dynamics; pumping conditions; single-doped Er3+ systems; up-conversion; Absorption; Crystals; Energy exchange; Equations; Erbium; Laser excitation; Laser modes; Laser transitions; Optical pulses; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
