Author Affiliations
Abstract
1 Department of Physics, Zhejiang University, Hangzhou310027, China
2 Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, Department of Physics, Zhejiang University, Hangzhou310027, China
Considering the thermodynamical fluid mechanics in the gain medium and laser kinetic processes, a three-dimensional theoretical model of an exciplex-pumped Cs vapor laser with longitudinal and transverse gas flow is established. The slope efficiency of laser calculated by the model shows good agreement with the experimental data. The comprehensive three-dimensional distribution of temperature and particle density of Cs is depicted. The influence of pump intensity, wall temperature, and fluid velocity on the laser output performance is also simulated and analyzed in detail, suggesting that a higher wall temperature can guarantee a higher output laser power while causing a more significant heat accumulation in the cell. Compared with longitudinal gas flow, the transverse flow can improve the output laser power by effectively removing the generated heat accumulation and alleviating the temperature gradient in the cell.
excimer lasers gas flow simulation theoretical model High Power Laser Science and Engineering
2021, 9(2): 02000e26
Author Affiliations
Abstract
Department of Physics, Zhejiang University, Hangzhou 310027, China
A theoretical model is established to describe the thermal dynamics and laser kinetics in a static pulsed exciplex pumped Cs–Ar laser (XPAL). The temporal behaviors of both the laser output power and temperature rise in XPALs with a long-time pulse and multi-pulse operation modes are calculated and analyzed. In the case of long-time pulse pumping, the results show that the initial laser power increases with a rise in the initial operating temperature, but the laser power decreases quickly due to heat accumulation. In the case of multi-pulse operation, simulation results show that the optimal laser output power can be obtained by appropriately increasing the initial temperature and reducing the thermal relaxation time.
excimer lasers simulation theoretical model High Power Laser Science and Engineering
2019, 7(3): 03000e44
综合考虑铷原子两种同位素频移、压力展宽和D1、D2线的超精细分裂作用，建立了一个物理模型，结合实验参量，计算分析了铷原子D1、D2线的超精细光谱结构，得到与实验基本一致的模拟结果。定量分析了铷蒸气池中所充缓冲气体压强、组分和蒸气池温度对铷原子D1、D2线的光学碰撞截面的影响，计算比较了不同气压时铷原子D1、D2线的线型与线宽信息，得到了一组优化参数组合，为深入理解碱金属原子D1、D2线的展宽机制及其与半导体激光的线型匹配提供了理论依据。
激光光学 碱金属原子吸收线宽展宽 建立模型 铷蒸气激光 压力展宽 超精细光谱结构 碰撞截面 中国激光
2011, 38(s1): s115001
对带轴向温控仪的金属蒸气激光放电管,建立了描述放电管径向温度场的简单数学模型。给出了由热辐射和热传导引起的径向温度变化的解析表达式,计算分析了轴向温控仪对激光管管壁温度和径向温度分布的作用机制。结果表明轴 向温控仪可在一定范围内独立调节放电管管壁温度和减小激光管的径向温度梯度,可有效提高激光器运转效率和稳定性。
激光技术 轴向温控仪 金属蒸气激光 径向温度分布
Author Affiliations
Abstract
Department of Physics, Zhejiang University, Hangzhou 310027
A sealed-off CuBr vapour laser with the maximal average output laser power of 20 W was fabricated and investigated. The corresponding efficiency is 1.2% and the specific average output laser power is 123 mW/cm3 in an active volume of 163 cm3. The lifetime of the laser is more than 300 hours operating at 12-15 W.
封离式激光管 溴化亚铜激光 实用化激光器 140.1340 Atomic gas lasers 140.7300 Visible lasers 140.3460 Lasers Chinese Optics Letters
2007, 5(10): 591
Author Affiliations
Abstract
Department of Physics, Zhejiang University, Hangzhou 310013
The exclusive carrier of photonics is photon, which is a kind of microscopic particles so that obeys the generalized Schrodinger equation, namely the motion equation for a photon. A novel state-vector function that satisfies the equation with three quantum conditions has been constructed, which possesses not only the energy and the momentum but also the angular momentum (spin) for a photon. The analyses of the state-vector function indicate that the macroscopic polarization of light is how to relate with microscopic parameters of a photon such as the probability amplitude and the phase.
270.0270 Quantum optics 260.5430 Polarization Chinese Optics Letters
2005, 3(0s): 134
