ANALYSES FOR LASING THRESHOLD AT 2 AND 1.5μm WAVELENGTHS IN Tm:YVO4 CRYSTAL
Huang Li-lei (黄莉蕾)a, Hong Zhi (洪治)b
a Optoelectronic Division, China Institute of Metrology, Hangzhou 310034, China; b Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China
Abstract From transition-rate-equations and transmission-equations the formulas of threshold power are deduced for an end-pumped laser, in which the probability of cross-relaxation cannot be ignored and the nonradiative transition-probability of the excited state is the same order as the radiative transition-probability of upper level of the lasing transition. The lasing performance of Tm:YVO4 at $\lambda$=1.9 and 1.5μm is discussed by dint of these equations of threshold power.
Received: 19 March 1999
Revised: 10 May 1999
Accepted manuscript online:
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