Thermal tuning of a Tm3+:Ho3+:SiO2 glass fiber laser was investigated.
As a function of fiber length and temperature, the emission wavelengt
h can be varied between 1960 and 2032 mn, The bandwidth of the laser e
mission is about 2 mm, Besides the wavelength also the change of thres
hold and slope efficiency with temperature and fiber length and the fi
ber absorption were measured.