Abstract

2 at.% Er and 20 at.% Yb crystalline co-doped Er:Yb:YCOB has been grown and characterized. Polarized absorption spectra and fluorescence spectra were measured and gain cross sections were calculated. The data show that Er:Yb:YCOB is a promising material for laser emission in the favorable wavelength range of 1546-1570nm for practical applications. Laser emission at 1554nm has been obtained for the first time, using a 976nm diode pump source.

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