Red-shift in Er : ZBLALiP whispering gallery mode laser
Cai, Z. P.
Xu, H. Y.
Stephan, G. M.
- 信息技术－已发表论文 
Microspheres were fabricated using a new kind of Erbium doped heavy fluoride glass Er:ZBLALiP. Whispering gallery mode spectra around 1550 nm were recorded for different sphere diameters and Erbium concentrations under pumping by a fiber taper at 1480 nm. Red-shift effect on the wavelengths of both fluorescence and laser spectra is experimentally observed when the pump power is increased, originating from thermal effects. A spectroscopic technique based on the green upconversion fluorescence is used to compute a loading effective temperature for the Er:ZBLALiP microsphere. This method allows us to calibrate the glass properties in terms of the thermal expansion as well as the variation of the refractive index. (C) 2003 Elsevier B.V. All rights reserved.