铷蒸气激光器中的碰撞能量转移效应

• 作 者: 葛伦 华卫红 王红岩 杨子宁 韩海涛
• 机 构: 国防科学技术大学光电科学与工程学院,中国人民解放军61773部队,
• 出 处: 红外与激光工程
• 发表日期: 2013年02期
• 关键词: 铷蒸气激光器 碰撞能量转移 相速率方程 相激光发射速率 rubidium vapor laser Energy Pooling rate equation la

为研究高泵浦强度下铷蒸气激光器中的碰撞能量转移效应,建立了考虑碰撞能量转移的铷蒸气激光器速率方程模型。通过计算得到高泵浦强度下(10 kW/cm2),碰撞能量转移不会显著影响激光发射速率。碰撞能量转移强弱与激发态粒子数密度和对应温度下的速率常数有关。随着泵浦强度和激发态粒子数密度提高,碰撞能量转移会减小激光发射速率。但是,在较低泵浦强度、较低粒子数密度条件下,碰撞能量转移对自发辐射的抑制效果更为显著,反而会促使激光发射速率增加。

In order to study the collision energy transfer effect in rubidium vapor laser with high pumping intensity, a rubidium vapor laser velocity equation model considering collision energy transfer was established. By calculating the high pump intensity (10 kW / cm2), the collision energy transfer does not significantly affect the laser emission rate. The intensity of collisional energy transfer is related to the number density of excited states and the rate constant at the corresponding temperature. As the pump intensity and the number density of excited states increase, collision energy transfer reduces the laser emission rate. However, under the conditions of lower pump density and lower particle number density, the impact energy transfer is more effective in suppressing spontaneous emission, but it will increase the laser emission rate.