2000•Chinese PhysicsOpen access

Analyses for lasing threshold at 2 and 1.5 μm wavelengths in Tm:YVO4crystal

Huang Li-lei, Zhi Hong

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:YVO 4 at λ = 1.9 and 1.5 μm is discussed by dint of these equations of threshold power.

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Key concepts: Lasing threshold, Rate equation, Excited state, Wavelength, Laser, Materials science, Radiative transfer, Crystal (programming language)