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ANALYSES OF OUTPUT CHARACTERISTICS FOR FOUR-LEVEL SYSTEM LASER |
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| Authors: | Huang Li-lei Fang Da-wei Hong Zhi |
| Abstract: | From transition-rate-equations and transmission-equations the formulas of threshold power and slope efficiency of an end-pumped laser for a four-level system are deduced. Citing the laser of Er:YAG as an example, we have discussed the differences of laser output characteristics between the three-and four-level systems. |
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