Author Affiliations
Abstract
1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
3 University of Chinese Academy of Sciences, Beijing 100049, China
4 CAS Center for Excellence in Ultra-intense Laser Science, Shanghai 201800, China
A novel tiled Ti:sapphire (Ti:S) amplifier was experimentally demonstrated with >1 J amplified chirped pulse output. Two Ti:S crystals having dimensions of 14 mm× 14 mm× 25 mm were tiled as the gain medium in a four-pass amplifier. Maximum output energy of 1.18 J was obtained with 2.75 J pump energy. The energy conversion efficiency of the tiled Ti:S amplifier was comparable with a single Ti:S amplifier. The laser pulse having the maximum peak power of 28 TW was obtained after the compressor. Moreover, the influence of the beam gap on the far field was discussed. This novel tiled Ti:S amplifier technique can provide a potential way for 100 PW or EW lasers in the future.
Ti:sapphire crystal tiled Ti:sapphire amplifier chirped pulse Chinese Optics Letters
2021, 19(1): 011401
1 中国科学院理化技术研究所低温工程学重点实验室, 北京 100190
2 中国科学院大学, 北京 100049
热效应是制约固态激光器技术发展的主要障碍之一，也是激光器发展的主要瓶颈。针对一抽运功率为100 W的掺钛蓝宝石激光器设计制造了一套以液氮为冷却工质的低温恒温器，从结构上对恒温器进行了优化设计，用实验的方法验证了该恒温器的热力学性能，用ANSYS软件分析了钛蓝宝石晶体在所设计的热沉条件下的温度分布和应力分布。结果表明该恒温器结构能够满足激光器的要求，且相比于常温冷却，钛蓝宝石激光晶体在液氮温度下温度分布更均匀，热应力更小。
激光器 恒温器 液氮冷却 掺钛蓝宝石晶体 光学学报
2014, 34(s1): s114009
Author Affiliations
Abstract
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
We develop a splicing technology of Ti:sapphire crystals for a high-energy chirped pulse amplifier laser system that can suppress the parasitic lasing to improve the amplification efficiency compared to a large-size single Ti:sapphire crystal amplifier. Theoretical investigations on the characteristics of the amplifier with four splicing Ti:sapphire crystals, such as parasitic-lasing suppression and amplification efficiencies, are carried out. Some possible issues resulting from this splicing technology, including spectral modulation, stretching or splitting of the temporal profile, and the sidelobe generation in the spatial domain (near field and far field), are also investigated. Moreover, the feasibility of the splicing technology is preliminarily demonstrated in an experiment with a small splicing Ti:sapphire crystals amplifier. The temporal profile and spatial distribution of the output pulse from the splicing Ti:sapphire crystal amplifier are discussed in relation to the output pulse from a single Ti:sapphire crystal amplifier.
chirped pulse amplification splicing technology Ti:sapphire crystal amplifier High Power Laser Science and Engineering
2014, 2(2): 02000e11
1 中国工程物理研究院激光聚变研究中心,四川,绵阳,621900
2 中国工程物理研究院研究生部,四川,绵阳,621900
3 中国工程物理研究院激光聚变研究中心,四??绵阳,621900
分析了口径为ф80 mm的钛宝石晶体内的增益特性,对大口径钛宝石晶体中的泵浦光能量密度和泵浦光口径进行了优化设计.对于ф80 mm×17 mm的晶体,最佳工作光束口径为ф55 mm,泵浦能量为50 J;对于ф80 mm×30 mm的晶体,最佳工作光束口径为ф60 mm,泵浦能量为90 J,且其横向小信号增益远小于ф80 mm×17 mm晶体的.对影响大口径钛宝石晶体放大的横向放大自发辐射(ASE)和寄生振荡采用折射率匹配的包边技术进行了抑制。实验表明,该方法把允许横向增益从13提高到了2 100.实验系统为100 J绿光台面泵浦激光器,100 TW主放大器采用四程空间构型放大光路.ф80 mm×17 mm钛宝石晶体c轴水平放置,泵浦光和主激光均为水平偏振.当以泵浦光能量为49 J对主放大器进行双端泵浦,注入信号光能量为1.2 J,光束口径ф60 mm时,获得了14.2 J的放大光输出和286 TW的最高峰值功率.
掺钛蓝宝石 寄生振荡 放大自发辐射(ASE) Ti:sapphire crystal Parasitic oscillation Amplified spontaneous emission（ASE）
1 天津大学精密仪器工程系, 天津 300072
2 中国科学院上海光机所, 上海 201800
对上海光机所生产的国产掺钛蓝宝石晶体进行了大量的连续光运转和自锁模运转的实验研究，获得了与进口掺钛蓝宝石晶体相当的实验指标.并且结合实验结果.详细评估了国产掺钛蓝宝石晶体的质量.
掺钛蓝宝石晶体 自锁模
