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1.
设计了一种高倍率的固体皮秒脉冲激光放大器,采用Nd:YAG板条作为激光增益介质。借助板条结构的角度选通结构,搭建了板条五通放大系统,实现了对注入皮秒脉冲激光的高倍率放大。种子源工作在脉冲模式,放大器泵浦源在连续模式工作。皮秒光纤激光器可以在不同的重复频率下工作,脉冲宽度为13.4 ps。种子光经过隔离和耦合系统之后,注入板条的单脉冲能量为25 nJ。当种子源工作重复频率为24.46 MHz时,板条放大器输出平均功率377 W,单脉冲能量15.5 μJ;当种子源工作重复频率为49.8 kHz时,板条放大器输出平均功率89 W,单脉冲能量1.8 mJ,峰值功率为134 MW,放大倍率达到7.2×104。 相似文献
2.
《中国光学快报(英文版)》2017,(2)
A burst of six pulses with an average power of 38.7 W are obtained for a pulse-burst picosecond 1064 nm laser system at 1 k Hz. The six pulses have equal amplitudes and pulse spacings of 800 ps, the beam quality of the M2 factor is less than 2, and the pulse width is 67 ps. Seed pulses are broadened from 22 to 136 ps by single-pass volume Bragg gratings. A laser-diode end-pump Nd:YVO_4 beam-splitting amplifier is used to divide and amplify a single pulse into six pulses. An Nd:YAG regenerative amplifier and a single-pass high-gain amplifier are applied. 相似文献
3.
Xudong Li Renpeng Yan Yiping Zhou Xin Yu Hu Pan Deying Chen Zhongxiang Zhou 《Optical Review》2017,24(5):611-616
We report a high-repetition-rate, high-peak-power laser diode (LD) pumped burst-mode 1064 nm laser from a Nd:YVO4/Nd:YAG master oscillator power amplifier. 10–100 kHz pulse burst in a duration up to 2 ms is achieved in LD end-pumped Nd:YVO4 acousto-optically Q-switched laser. After amplification with LD side-pumped Nd:YAG rod amplifiers, the single pulse energy reaches 73 mJ in 10 kHz pulse burst laser with a peak power of 7.8 MW. 相似文献
4.
A longitudinally fiber-pumped, passively Q-switched Nd:YAG laser oscillator-power amplifier system is reported with which a maximum pulse energy of 68 mJ was achieved at high pulse stability, beam quality, and efficiency. Therefore, a compact fiber-coupling interface was developed for stacked arrays of quasi-cw diode lasers, providing a pump power of 1 kW at the fiber end. 相似文献
5.
6.
We are currently developing a high-efficiency Yb:YAG regenerative amplifier pumped by CW diode lasers. The performance of
the regenerative amplifier was estimated by theoretical calculations. For the excitation process, a rate equation was numerically
integrated over the repetition interval with CW pumping. For the regenerative pulse amplification process, the Frantz-Nodvik
equation was applied for each pass. The result of the theoretical calculation was compared with experimental data of a 2 mJ
output pulse energy at a 10 kHz repetition rate. An optical-optical conversion efficiency of 17.8% was achieved. The outline
of a prototype under development for a commercial product is also mentioned 相似文献
7.
A diode-end-pumped Nd:YAG laser is passively Q-switched by using Cr4+:YAG as saturable absorber. When CW pumped with a laser diode which the maximum power is 550 mW, the laser produces pulses of 24 ns duration at 1064 nm, with an energy of 26 μJ. 相似文献
8.
Effect of thermally induced birefringence on high power picosecond azimuthal polarization Nd:YAG laser system
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《中国物理 B》2019,(2)
Pulse-burst 1064-nm picosecond azimuthal polarization beam amplification up to an average power of 16.32 W using side-pumped Nd: YAG amplifiers has been demonstrated. The maximum envelop energy as much as 16.32 mJ, corresponding to a power amplification factor of 299.5%. A simple criterion was defined to help estimate the amount of depolarization in Nd:YAG amplifier stages. The degree of depolarization of the beam was 7.1% and the beam quality was measured to be M2= 3.69. The reason for the azimuthal polarization depolarization and beam quality degradation were explained theoretically and experimentally during the amplification process. 相似文献
9.
Hongyan Xu Zhenjiang Song Xiujun Huang Dele Shi Liang Liu Kaiming Wang 《Journal of Russian Laser Research》2018,39(3):275-279
We demonstrate a high-gain vortex power amplifier with the double-pass configuration based on the rod Nd:YAG crystal. In the experiments, a nanosecond vortex seed beam is converted from a conventional Q-switched Nd:YAG laser output with a spiral phase plate and then amplified with the Nd:YAG amplifier stage. A maximum amplification output energy up to 163.5 mJ is achieved at 20 Hz with a 3.2-ns pulse, corresponding to an amplification factor of 81.8. Further discussions are provided to find ways of increasing the power scaling. 相似文献
10.
用连续输出100mw和脉冲输出200mW的国产双异质结激光二极管(DH-LD)泵浦Nd:YAG激光器,得到稳定的半导体激光泵浦的固体激光器连续输出12mW和10~50kHz重复频率的准连续输出,每个脉冲激光峰值功率20mW,起伏小于1%,与计算结果基本一致. 相似文献
11.
Passive Q-switching of Pulsed and CW Nd:YAG Lasers with Cr ̄(4+):YAGPassiveQ-switchingofPulsedandCWNd:YAGLaserswithCr ̄(4+):YAG... 相似文献
12.
Runwu Peng Lin Guo Xiaofu Zhang Fangqin Li Qianjin Cui Yong Bo Qinjun Peng Dafu Cui Zuyan Xu 《Optics Communications》2008,281(10):2879-2882
A high average power picosecond laser amplification system with diode-end-pumped Nd:YVO4 and diode-side-pumped Nd:YAG is described. Laser with power up to 92.7 W, repetition frequency of 73.3 MHz, pulse duration of 26.5 ps, and beam quality of M2 < 3.5 is generated in the amplification system. Thermal-birefringence-induced depolarization in the Nd:YAG rod laser head amplifier is measured to be 21.9 W though birefringence compensation is performed. 相似文献
13.
14.
Hu Pan Renpeng Yan Xudong Li Xin Fa Yufei Ma Rongwei Fan Xin Yu Deying Chen 《Journal of Russian Laser Research》2016,37(3):259-264
We present a compact high-peak-power, high-repetition-rate burst-mode laser from a master-oscillator power amplifier (MOPA) at 1064 nm for laser-based measurement applications. The oscillator is an 808 nm pulsed laser diode side-pumped acousto-optical (A-O) Q-switched Nd:YAG laser at repetition rates ranging from 10–100 kHz, producing a pulse train with a pulse number of 2–25. The maximum output energy of the oscillator is 15.6 mJ at 10 kHz, whereas it is 1.7 mJ at 100 kHz. After twostage amplifiers, a single-pulse energy of 85.2 mJ with a pulse-width of 14.5 ns is achieved at 10 kHz, which produces a peak power of 6.1 MW. At 100 kHz, the total burst energy reaches 220 mJ with a single-pulse energy of 8.8 mJ in the pulse burst laser system. 相似文献
15.
R. Lan Z. Wang H. Liu H. Yu L. Guo L. Chen S. Zhuang X. Xu J. Wang 《Laser Physics》2010,20(1):187-191
A large pulse energy and high peak power passively Q-switched ceramic neodymium-doped yttrium aluminum garnet (Nd:YAG) laser
has been demonstrated with Cr4+:YAG crystals as the saturable absorbers. By employing a continuous wave (CW) laser-diode (LD) as the pump source, as high
as 11.3 W CW output power of 1064 nm was obtained under the pump power of 21.6 W, with an optical conversion efficiency of
52.3%. Inserting different initial transmissions Cr4+:YAG as saturable absorbers, under the incident pump power of 15.6 W, the largest pulse energy, shortest pulse width, and
highest peak power are measured to be 188 μJ, 3.16 ns, and 59.5 kW, respectively. As we has known, this is the best passively
Q-switched results ever reported by Nd:YAG ceramic material. 相似文献
16.
S. S. Zhang Q. P. Wang X. Y. Zhang Z. J. Liu W. J. Sun S. W. Wang 《Laser Physics》2009,19(12):2159-2162
A diode-end-pumped continuous-wave (CW) Nd:YAG laser emitting at 1123 nm is realized efficiently in a 25-mm-long cavity. A
composite Nd:YAG (cNd:YAG) crystal is selected as the gain medium. With an incident diode power of 26.1 W, an output power
of up to 9.3 W is obtained, corresponding to an optical-to-optical conversion efficiency of 35.6%. The laser performances
at 1123 nm are compared between composite Nd:YAG and common Nd:YAG crystals. The results show that composite Nd:YAG is a better
choice for 1123-nm laser generations. 相似文献
17.
93.7 W 1112 nm diode-side-pumped CW Nd:YAG laser 总被引:1,自引:0,他引:1
C. Y. Li Z. C. Wang Y. T. Xu F. Yang B. S. Wang H. W. Gao Y. Bo Q. J. Peng D. F. Cui Z. Y. Xu 《Laser Physics》2010,20(7):1572-1576
We demonstrate a high power continuous wave (CW) infrared laser operated at 1112 nm from a diode side-pumped Nd:YAG crystal
with a plano-plano symmetrical resonator. By inserting an etalon, an output power of as high as 93.7 W at 1112 nm was obtained
at the pump power of 570 W with conversion efficiency of 16.4%. The beam quality factor of M2 was measured to be about 17. The wavelength tunable performance of the etalon was also analyzed. To the best of our knowledge,
it is the highest output power at 1112 nm CW laser based on Nd:YAG crystal. 相似文献
18.
搭建了一台高重复频率、高峰值功率、高平均功率的激光器. 激光器主要包括三部分: 单纵模光纤种子源、激光二极管阵列抽运的Nd:YAG再生放大器和四程放大器. 系统获得了平均功率11 W、重复频率100 Hz、脉冲能量112 mJ、脉宽500 ps–2 ns可调的激光输出, 工作波长1064 nm. 输出光束口径6.8 mm, 1.5倍衍射极限, 近场光强近平顶分布, 能量稳定性为0.72%.
关键词:
激光二极管抽运
高重复频率
高峰值功率
高平均功率 相似文献
19.
寄生振荡的存在使得放大器在信号光到达之前消耗了大量的反转粒子数,降低了放大器的激光增益和储能效率,严重地影响了激光放大器的性能,尤其对高功率激光放大器。在理论分析和实验研究的基础上,以Nd∶YAG晶体板条为例,用8条半导体激光阵列对晶体进行双侧抽运,研究了高功率激光放大器的寄生振荡现象,分析了板条晶体寄生振荡产生的原因,并详细比较了晶体在不同的抽运功率和表面处理下的放大效果,得到了2倍的单程放大,当输入能量为140 mJ时,获得了278 mJ的激光输出。 相似文献
20.
《中国光学快报(英文版)》2017,(12)
The pulse characteristics of a laser diode dual-end-pumped electro-optic Q-switched Nd:LuAG ceramic laser at various repetition rates are presented. The largest output pulse energy of 11 mJ is realized at the repetition rate of 100 Hz with pump energy of 84.3 mJ, and the slope efficiency in respect to pump pulse energy is 18.6%. The single pulse peak power reaches up to 1.57 MW. Using Nd:LuAG ceramic as the amplification medium seeded by an Nd:YAG laser of 5.2 mJ, a 10.3 mJ amplified pulse is obtained with pump pulse energy of 42.8 mJ, corresponding to an extraction efficiency of 11.9%. 相似文献