1 深圳技术大学 中德智能制造学院 先进光学精密制造技术广东普通高校重点实验室,深圳 518118
2 深圳大学 物理与光电工程学院 深圳市激光工程重点实验室,深圳 518060
3 大族激光科技产业集团股份有限公司,深圳 518103
高功率激光器在工业应用领域的需求不断增长,提高光-光转化效率是降低其生产制造成本的关键途径。针对提高激光器光-光转化效率所面临的增益介质的热负荷问题,利用锁定波长的969 nm“零声子线”泵浦、自主研制的高性能Yb∶YAG薄片晶体和48冲程泵浦系统等,搭建了高效的连续Yb∶YAG薄片激光器系统,实现了最高输出功率373 W,光-光转化效率可达73.37%。其优异性能为后续开展千瓦级超快Yb∶YAG薄片激光器研究奠定了基础。
薄片激光器 多冲程泵浦 Yb∶YAG 高效率 Thin-disk laser Multi-pass pumping Yb∶YAG High efficiency
林庆典 1,2,3陈业旺 4余军 1,2,3郭晓杨 1,2,3,5,*[ ... ]阮双琛 1,2,4,*
1 深圳技术大学 先进材料测试技术研究中心,广东 深圳 518118
2 深圳技术大学 深圳市超强激光与先进材料技术重点实验室,广东 深圳 518118
3 深圳技术大学 工程物理学院,广东 深圳 518118
4 深圳技术大学 中德智能制造学院,广东 深圳 518118
5 工物科技(深圳)有限公司,广东 深圳 518118
利用自行研制的啁啾布拉格光纤光栅(CFBG)刻写系统完成CFBG样品制作,成功应用于光纤锁模振荡器和啁啾脉冲放大(CPA)系统中。振荡器可输出19.4 nm带宽、18 mW平均功率激光,并可压缩至143 fs,经时域展宽、功率放大、时域压缩后,脉冲宽度可至264 fs。实验结果初步证明了国产CFBG在飞秒激光系统应用的可行性。
啁啾光纤光栅 啁啾脉冲放大 光纤锁模振荡器 飞秒激光 超快激光 chirped fiber Bragg grating chirped pulse amplification fiber mode-locked oscillator femtosecond laser ultrafast laser 强激光与粒子束
2022, 34(4): 041001
1 深圳技术大学先进光学精密制造技术广东普通高校重点实验室,广东 深圳 518118
2 深圳技术大学中德智能制造学院,广东 深圳 518118
3 深圳市人民医院,广东 深圳 518020
采用线型腔结构,实现了中心波长为1939.31 nm、脉宽在0~2000 μs可调、重复频率在0~2 kHz可调、最大平均输出功率为34.2 W的准连续掺铥光纤激光器,并利用此激光器在体外环境下开展结石消融量随激光脉宽与重复频率的变化规律的研究。结果显示:在相同时间内,当单脉冲能量相近时,增大脉冲重复频率(平均输出功率)有利于提高碎石速率;当平均输出功率接近时,单脉冲能量越大,石块消融量越大。在90 s的碎石时间内,石块经过31.8 W/0.053 J(250 μs)、33.1 W/0.11 J(500 μs)、33.5 W/0.22 J(1000 μs)、34.2 W/0.45 J(2000 μs)4组参数激光照射后的消融量分别为0.333,0.480,0.697,0.723 g,结石表面的最高水温分别为30.8,35.5,38.9,41.2 ℃。
激光光学 激光碎石 掺铥光纤激光器 准连续激光器 结石消融
Author Affiliations
Abstract
1 Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China
2 College of Electronics and Information Engineering, Shenzhen University, Shenzhen 518060, China
A stable noise-like (NL) mode-locked Tm-doped fiber laser (TDFL) relying on a nonlinear optical loop mirror (NOLM) was experimentally presented. Different from the previous NL mode-locked TDFL with NOLM, the entire polarization-maintaining (PM) fiber construction was utilized in our laser cavity, which makes the oscillator have a better resistance to environmental perturbations. The robust TDFL can deliver stable bound-state NL pulses with a pulse envelope tunable from ~14.1 ns to ~23.6 ns and maximum pulse energy of ~40.3 nJ at a repetition rate of ~980.6 kHz. Meanwhile, the all-PM fiber laser shows good power stability (less than ~0.7%) and repeatability.
noise-like pulse all-polarization-maintaining fiber nonlinear loop mirror Tm-doped fiber laser Chinese Optics Letters
2021, 19(9): 091402
Author Affiliations
Abstract
1 Shenzhen Key Laboratory of Laser Engineering, Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
2 Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK
The simultaneous dual-band pulsed amplification is demonstrated from an Er/Yb co-doped fiber (EYDF), and consequently a high-power all-fiber single-mode 1.0/1.5 μm dual-band pulsed master oscillator power amplifier (MOPA) laser source is realized for the first time, to the best of our knowledge, based on one singlegain fiber. The simultaneous outputs at 1061 and 1548 nm of the laser source have the maximum powers of 10.7 and 25.8 W with the pulse widths of 9.5 ps and 2 ns and the pulse repetition rates of 178 and 25 MHz, respectively. This EYDF MOPA laser source is seeded by two separate preamplifier chains operating at 1.0 and 1.5 μm wavebands. The dependence of the laser output powers on the length of the large-mode area EYDF, the ratio of the powers of the two signals launched into the booster amplifier, and the wavelength of the 1 μm seed signal are also investigated experimentally.
140.3510 Lasers, fiber 140.3280 Laser amplifiers Chinese Optics Letters
2018, 16(2): 020010
1 深圳大学电子科学与技术学院深圳市激光工程重点实验室, 广东 深圳 518060
2 深圳大学光电工程学院深圳市激光工程重点实验室, 广东 深圳 518060
采用铒镱共掺光纤, 实现了一种双波长1.0 μm 调Q和1.5 μm增益开关脉冲光纤激光器。实验装置是一个双环腔结构, 两环的公共端共用一段铒镱共掺光纤。1.0 μm调Q脉冲通过未抽运铒镱共掺光纤的可饱和吸收效应产生。而铒镱共掺光纤对1.0 μm调Q脉冲的再吸收会周期性调制铒离子的反转粒子数, 从而产生重复频率相等的1.5 μm增益开关脉冲。随着抽运功率的增加, 这两种脉冲的重复频率从5.4 kHz增加到11.7 kHz。1.5 μm脉冲相对1.0 μm脉冲有一定的延迟, 并且延迟时间随着抽运功率的增大而不断减小。在最大抽运功率处, 1.0 μm脉冲宽度、单脉冲能量和最大平均输出功率分别是5.3 μs、402.6 nJ 和 4.7 mW, 而对于1.5 μm脉冲, 分别是4.6 μs、 374.4 nJ 和 4.4 mW。
激光器 双波长脉冲光纤激光器 调Q 增益开关 铒镱共掺光纤