| Theoretical study on the laser gain of a multi-stage dye laser amplifier |
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| 作者姓名： | 孔祥蕾 张先燚 罗晓琳 张树东 张伟 李海洋 |
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| 作者单位： | Laboratory of Environmental Spectroscopy，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 Graduate School of Chinese Academy of Sciences，Beijing 100039，Laboratory of Environmental Spectroscopy，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 Graduate School of Chinese Academy of Sciences，Beijing 100039，Laboratory of Environmental Spectroscopy，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 Graduate School of Chinese Academy of Sciences，Beijing 100039，Laboratory of Environmental Spectroscopy，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 Graduate School of Chinese Academy of Sciences，Beijing 100039，LaboratorJr of Environmenta1 SPectroscoPK AnIslli Institute of OPtics and Finc AIe'h，lzlics，CIincse Academ，y ot' Scicnces，Hefei 230031，Laboratory of Environmental Spectroscopy，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031 Graduate School of Chinese Academy of Sciences，Beijing 100039 |
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| 摘 要： | Theoretical studies on laser gain of a multi-stage dye laser amplifier are presented in this paper. The resultsshow that the influences of amplified spontaneous emission(ASE)and nonlinear absorption of excited-state on the gain are different for different input laser energies and gains. A threshold input intensityexists for a specific system. If the imput intensity is higher than the threshold, the nonlinear absorptionof excited-state will be the main cause for gain decrease. Otherwise, the ASE is the main cause. A newscheme is proposed to calculate the gain of the amplifier by the comparison of the input intensity with theeffective saturation intensity and the choice of the calculation gain method.
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Theoretical study on the laser gain of a multi-stage dye laser amplifier |
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| Abstract: | Theoretical studies on laser gain of a multi-stage dye laser amplifier are presented in this paper. The results show that the influences of amplified spontaneous emission (ASE) and nonlinear absorption of excitedstate on the gain are different for different input laser energies and gains. A threshold input intensity exists for a specific system. If the input intensity is higher than the threshold, the nonlinear absorption of excited-state will be the main cause for gain decrease. Otherwise, the ASE is the main cause. A new scheme is proposed to calculate the gain of the amplifier by the comparison of the input intensity with the effective saturation intensity and the choice of the calculation gain method. |
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