采用混合玻璃配置提高高功率激光装置短脉冲输出能力

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Improving output capability of high-power laser at short pulse duration using different laser glasses together in amplifier

1.
School of Information Science and Engineering,Shandong University,Ji'nan 250100,China;
2.
Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China

摘要: 在分析不同基质材料激光特性的基础上，结合钕玻璃放大系统的增益特性和ΔB分布特性，提出了在高功率激光装置的主放大级中，混合使用高增益激光玻璃和低非线性折射率玻璃的新思路，以期在降低非线性折射率的基础上提高激光装置在短脉冲的输出能力。用光传输程序模拟计算所得结果表明该方案能有效提高系统输出能力。在1 ns时，激光系统最大能量输出有30%~40%增长。
- 高功率激光装置 /
- 能量增益 /
- 数值模拟 /
- 激光玻璃 /
- 非线性折射率
Abstract: The optical and laser properties of several laser glasses have been discussed. According to the properties of the gain and the B integral in the high power laser amplifier chain,an optimal configuration is advanced that high gain glasses and low n2 glases are used in the different amplifier stages simultaneously. In this way, the restriction of the B integral effect to the maximal output capability can be weaken and the output capability difference between short pulses and long pulses can be decreased.The simulated result shows that the optimal configuration can potentially provide a 30%~40% output energy improvement as compared with the present configuration at 1 ns．
- high-power laser facility /
- energy gain /
- numerical simulation /
- laser glass /
- nonlinear refractive index coefficient

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