新型高功率小孔耦合内腔光泵THz激光技术研究

项目名称： 新型高功率小孔耦合内腔光泵THz激光技术研究

项目编号： No.61505043

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张延超

作者单位： 哈尔滨工业大学

项目金额： 21万元

中文摘要： 本项目针对目前光泵THz激光效率较低的研究现状，在我们前期研究高重频光泵THz激光器的基础上，提出了一种新型小孔耦合内腔光泵THz激光谐振腔，克服了目前内腔光泵THz激光谐振腔所需的THz波段的镜片材料及镀膜技术的限制。由于在相同条件下泵浦激光在腔内光强远强于腔外，因此内腔光泵结构的THz激光器泵浦总效率可以提高到10倍以上，可以获得高功率THz激光输出。另外通过腔内高速斩波可实现高重复频率高功率脉冲THz激光输出。本项目重点是对谐振腔内光场建立数学模型进行模拟仿真，对激光动力学过程进行理论分析与计算，合理设计新型小孔输出稳定谐振腔参数，通过实验研究获得平均功率达到瓦量级的THz激光输出。此项研究的进展，将为光泵THz激光技术的发展带来较大的突破，可应用于高速THz成像、THz激光雷达、THz激光无损探测等领域，为THz激光在实际中更广泛的应用奠定基础。

中文关键词： 太赫兹激光光源；内腔；光泵浦；小孔耦合谐振腔

英文摘要： The project is a new designed intra-cavity optically pumped THz laser to improve the laser power and pump efficiency, which is based on the current research situation of the optically pumped THz laser and our previous work. The project overcomes the limitation of the THz band material and lens coating technology for intra-cavity optically pumped THz laser. The pump laser intensity in the cavity is larger than extra-cavity under the same condition, so the THz laser with high efficiency and high output power is easily obtained, and the pumped efficiency can be improved about 10 times in this project. The pulsed THz laser with high pulse repetition rate can be obtained by high speed rotating chop plate in the cavity. This project theoretically calculate and simulate the optical field distribution in the cavity and dynamic equation of intra-cavity THz laser, while design the new resonator with round hole and make analysis for the W-level THz laser output would be obtained in the experiment. The outbreak of this project will lay important foundation for practical application of THz-band in the fields of high speed THz imaging, THz laser radar and THz laser non-damage detection.

英文关键词： THz laser;intra-cavity;optically pumped;small hole coupling resonator