Title :
Numerical calculation of the small signal gain in Er:Ti:LiNbO/sub 3/ channel waveguides
Author :
Helmfrid, Sten ; Arvidsson, Gunnar
Author_Institution :
R. Inst. of Technol., Stockholm, Sweden
fDate :
7/1/1991 12:00:00 AM
Abstract :
The overlap integral describing the small signal gain coefficient in Er:Ti:LiNbO/sub 3/ channel waveguides is numerically evaluated, and the results are used to discuss the polarization dependence and the influence of the erbium ion distribution. It is shown that bleaching is obtained at a substantially lower pump power for an extraordinarily polarized mode. A study of the influence of the overlap and the mode confinement at different pump bands indicates that the poorer overlap between the pump and signal mode at shorter pump wavelengths can be compensated for by an improved overlap with the erbium ions.<>
Keywords :
erbium; light polarisation; lithium compounds; optical pumping; optical waveguides; solid lasers; stimulated emission; titanium; LiNbO/sub 3/:Er,Ti; bleaching; channel waveguides; extraordinarily polarized mode; mode confinement; overlap integral; polarization dependence; pump power; signal mode; small signal gain coefficient; Erbium; Integral equations; Optical fibers; Optical pumping; Optical surface waves; Optical waveguides; Particle beam optics; Polarization; Stimulated emission; Titanium;
Journal_Title :
Photonics Technology Letters, IEEE
