Author Affiliations
Abstract
1 Ultrafast Laser Laboratory, Key Laboratory of Opto-Electronic Information Technology, Ministry of Education, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2 Laize Photonics Co., Ltd, Beijing 101399, China
We demonstrate an all polarization-maintaining (PM) fiber mode-locked laser seeded, hybrid fiber/solid-slab picosecond pulse laser system which outputs $40~\unicode[STIX]｛x03BC｝\text｛J｝$, 10 ps pulses at the central wavelength of 1064 nm. The beam quality factors $M^｛2｝$ in the unstable and stable directions are 1.35 and 1.31, respectively. $15~\unicode[STIX]｛x03BC｝\text｛J｝$ picosecond pulses at the central wavelength of 355 nm are generated through third harmonic generation (THG) by using two $\text｛LiB｝_｛3｝\text｛O｝_｛5｝$ (LBO) crystals, in order to get better processing efficiency on polycrystalline diamonds. The high pulse energy and beam quality of these ultraviolet (UV) picosecond pulses are confirmed by latter experiments of material processing on polycrystalline diamonds. This scheme which combines the advantages of the all PM fiber mode-locked laser and the solid-slab amplifier enables compact, robust and chirped pulse amplification-free amplification with high power picosecond pulses.
all polarization-maintaining fiber chirped pulse amplification free amplification hybrid fiber/solid slab material processing mode-locked laser. High Power Laser Science and Engineering
2018, 6(2): 02000e18
1 长沙理工大学物理与电子科学学院, 湖南 长沙 410076
2 中国科学院物理研究所光物理实验室, 北京 100080
实验研制了端抽运Nd∶YVO4放大器和侧抽运Nd∶YAG放大器相结合的高功率高光束质量皮秒激光器。这一系统充分利用了Nd∶YVO4 晶体受激发射截面大和Nd∶YAG晶体热导率大的优点。端面抽运Nd∶YVO4放大器使振荡器输出的激光获得高增益而迅速放大, 随后的侧面抽运的Nd∶YAG激光模块放大器有利于大功率抽运从而得到高功率激光输出。侧抽运Nd∶YAG放大器采用了双程放大的方式设计, 利于提高放大器的效率。为保证光束质量和光束模式匹配, 在放大器之间设计了合适的空间滤波器。激光器输出平均功率43.4 W, 光束质量因子M2<1.7的皮秒激光。
激光器 皮秒激光 Nd∶YVO4放大器 Nd∶YAG放大器 二极管抽运
Author Affiliations
Abstract
1 Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
We experimentally realize a singly resonant optical parameter oscillator (OPO) which operates at the degenerate point of KTiOPO4 (KTP) crystal. A thin film plate polarizer (TFP) is used as the output coupler to obtain linearly polarized 2.12 \mum laser. A maximum output power of 2.2 W at 2.12 \mum is obtained from a near-degenerate, type-II KTP OPO by utilizing a Q-switched diode-pumped Nd:YAG laser operating at 5 kHz.
光参量振荡器 单共振 KTP 190.4410 Nonlinear optics, parametric processes 140.3070 Infrared and far-infrared lasers 140.3410 Laser resonators Chinese Optics Letters
2009, 7(6): 06519
1 中国科学院理化技术研究所, 北京 100190
2 济南钢铁集团总公司装备部, 山东 济南 250010
多热焦距激光谐振腔与单热焦距谐振腔相比, 具有结构灵活、热管理简便等优点, 然而其热稳定性受到激光头分布等因素影响, 需要优化设计以实现多热焦距激光谐振腔高功率稳定输出。理论分析了激光头分布对多热焦距激光谐振腔热稳定性的影响, 对比了单热焦距双棒谐振腔、双热焦距3棒对称谐振腔和双热焦距3棒非对称谐振腔的热稳定性。根据理论分析, 采用不同热焦距的激光头构成双热焦距3棒串接对称热近非稳腔, 通过优化设计, 当抽运功率为3480 W时, 该连续波1064 nm Nd∶YAG激光系统获得稳定输出, 最高输出功率达1125 W, 光-光转换效率达32%, 光束质量约15 mm·mrad。
激光技术 固体激光 热焦距 三棒串接
Author Affiliations
Abstract
1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039
3 Physics Department, Shihezi University, Shihezi 832003
A high power continuous-wave (CW) diode-pumped Nd:YAG laser operated in heat capacity mode is demonstrated by use of two identical highly efficient diode-pumped laser heads placed in a plane-plane resonator. The laser heads are uniformly pumped with a five-fold symmetrical side-pumping configuration, and each head is able to output maximum output power of 2200 W at 808 nm. Under a total pump power of 4290 W, the output power of the laser at 1064 nm is up to 2277 W, corresponding to an optical-to-optical efficiency of 53.1%.
连续波 热容运转模式 全固态 Nd:YAG 140.3480 Lasers, diode-pumped 140.4780 Optical resonators 140.3530 Lasers, neodymium Chinese Optics Letters
2007, 5(4): 226
