The significance of temperature dependence of the wavelength and the laser emission threshold of fiber-taper-coupled Er 3+-doped tellurite glass microsphere was analyzed. A rise in the microsphere laser emission threshold and a shift in emitted laser wavelength occurred with the temperature. A shift in the resonant wavelength of the pumping light was caused by the changes of the size and refractive index of the microsphere. A quasi-four-level model was used to show the reduction of laser threshold, achieved at lower temperatures and higher Q values of the microsphere laser.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)