Author Affiliations
Abstract
1 National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
2 Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
A 100-J-level Nd:glass laser system in nanosecond-scale pulse width has been constructed to perform as a standard source of high-fluence-laser science experiments. The laser system, operating with typical pulse durations of 3–5 ns and beam diameter 60 mm, employs a sequence of successive rod amplifiers to achieve 100-J-level energy at 1053 nm at 3 ns. The frequency conversion can provide energy of 50-J level at 351 nm. In addition to the high stability of the energy output, the most valuable of the laser system is the high spatiotemporal beam quality of the output, which contains the uniform square pulse waveform, the uniform flat-top spatial fluence distribution and the uniform flat-top wavefront.
design design frequency conversion frequency conversion laser amplifiers laser amplifiers laser engineering laser engineering laser systems laser systems light propagation light propagation modeling modeling nonlinear optics nonlinear optics optimization optimization wavefront correction wavefront correction High Power Laser Science and Engineering
2016, 4(1): 01000e10
1 哈尔滨工业大学可调谐激光技术国家重点实验室, 黑龙江 哈尔滨 150001
2 中国科学院光电研究院, 北京 100094
利用受激布里渊散射(SBS)能量转移的方案可以实现高效的百皮秒激光脉冲放大，这种放大方案可以用于冲击点火中冲击脉冲的获取。通过在液体介质中激发声波场，实现了能量从长脉冲向短脉冲转移的过程。利用一个瞬态条件下SBS耦合波方程来对200 ps脉冲的放大过程进行理论模拟。结果发现，利用SBS能量转移的方案可以将200 ps的激光脉冲放大到较高的功率密度，同时这个放大过程也伴随着一定程度的脉宽压缩。
激光器 受激布里渊散射 脉冲放大 瞬态理论 高功率
Author Affiliations
Abstract
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China
A new approach to realize high-energy and high-power stimulated Brillouin scattering phase conjugation mirrors (SBS-PCMs) is described. The reflectivity of SBS-PCM is investigated under a 10-Hz repetition rate and a high energy load. The relationship between reflectivity and input energy is examined experimentally with different PCM structures, focus lengths, and medium cell structures. A medium cell with a circulating structure is designed, and its advantage is demonstrated through an experimental comparison with traditional PCM structures. The 30-cm focus lens and 150-cm collimation lens are optimized when the input energy reaches 1010 mJ at 10-Hz repetition rate. Therefore, a reflectivity of 84.7% and a higher energy load using the circulating two-cell structure are achieved.
受激布里渊散射 相位共轭镜 双池结构 190.2640 Stimulated scattering, modulation,etc. 190.5040 Phase conjugation 140.3535 Lasers, phase conjugate 140.3580 Lasers, solid-state Chinese Optics Letters
2010, 8(11): 1064
哈尔滨工业大学光电子技术研究所, 黑龙江 哈尔滨 150080
研制了一套输出能量在100 J以上的大能量高功率钕玻璃激光系统。在设计中,对光路排布进行了优化,对系统放大增益进行了数值模拟,采用像传递技术和受激布里渊散射(SBS)相位共轭技术,提高了激光束的输出质量。Nd:YLF前端输出的单纵模脉冲激光经过两级双程放大和一级助推放大,获得了106 J的能量输出。针对在大口径高能高功率激光系统中应用受激布里渊散射相位共轭镜的要求,设计了一种新型的受激布里渊散射相位共轭镜结构,这种结构克服了传统独立双池的缺点,完全适用于高能高功率激光的双程放大结构。
激光技术 高功率激光系统 受激布里渊散射 相位共轭
