
Author Affiliations
Abstract
1 Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, China
2 Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, China
3 MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, Sydney, Australia
This study analyzes the linewidth narrowing characteristics of free-space-running Brillouin lasers and investigates the approaches to achieve linewidth compression and power enhancement simultaneously. The results show that the Stokes linewidth behavior in a free-space-running Brillouin laser cavity is determined by the phase diffusion of the pump and the technical noise of the system. Experimentally, a Stokes light output with a power of 22.5 W and a linewidth of 3.2 kHz was obtained at a coupling mirror reflectivity of 96%, which is nearly 2.5 times compressed compared with the linewidth of the pump (7.36 kHz). In addition, the theorical analysis shows that at a pump power of 60 W and a coupling mirror reflectivity of 96%, a Stokes output with a linewidth of 1.6 kHz and up to 80% optical conversion efficiency can be achieved by reducing the insertion loss of the intracavity. This study provides a promising technical route to achieve high-power ultra-narrow linewidth special wavelength laser radiations.
high power narrow linewidth single-frequency laser stimulated Brillouin scattering High Power Laser Science and Engineering
2023, 11(4): 04000e47
红外与激光工程
2023, 52(2): 20210870
红外与激光工程
2022, 51(10): 20220003
红外与激光工程
2021, 50(S2): 20210296
红外与激光工程
2021, 50(8): 20200390
航天工程大学 宇航科学与技术系 激光推进及应用国家重点实验室,北京101416
基于建立的单结GaAs太阳能电池激光辐照热传导模型和光电转换物理模型,对单结GaAs太阳能电池的脉冲激光辐照温度及光电转化影响进行了仿真模拟研究,分别研究了532 nm和808 nm两种不同波长的脉冲激光在不同辐照能量及入射角度下,太阳能电池温度、伏安特性、光电转换效率等性能变化,仿真结果表明,入射激光与太阳能电池法向之间夹角越小,太阳能电池输出电功率越大,在相同的激光辐照强度下,532 nm和808 nm波长激光对GaAs电池辐照导致的温度影响差别不大,808 nm波长激光比532 nm波长激光对于GaAs材料来说具有更大的吸收系数,太阳能电池能够吸收更多的能量,从而具有更高的响应,808 nm波长激光辐照单结GaAs电池能够输出更大的电功率以及带来更大的光电转换效率。
激光辐照 光电转化 温度 伏安特性 laser irradiation photoelectric conversion temperature voltage-current characteristics 红外与激光工程
2020, 49(S1): 20200262