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1.
理论上分析了端面抽运的1.34μm Nd:YVO4平凹腔型激光器的各项参数;实验 上实现了LD端面抽运的1.34μm Nd:YVO4平凹腔型激光器的运转.
关键词:
固体激光
4晶体')" href="#">Nd:YVO4晶体
平凹腔 相似文献
2.
研究了激光二极管端面抽运的双纵模双频微片激光器的热效应对其输出频谱的影响. 通过对端面抽运Nd:YVO4微片的热传导方程求解得出晶体内部的温度场分布; 并进一步对微片晶体热致折射率变化进行分析, 由此计算出双频微片激光器的热致频谱变化. 实验结果表明: 当抽运功率较小时得到稳定的双纵模双频激光输出; 当抽运功率增大时, 晶体热效应使双频激光频谱双峰之间的频差减小, 各纵模波长频谱宽度加宽, 实验结果与理论分析相符合.
关键词:
光载无线通信
双频微片激光器
热效应
频率差 相似文献
3.
报道了LD端面抽运c切Nd:YVO4自拉曼倍频黄光激光器的研究. 采用10 mm长,二类临界相位匹配角 (θ=69°,ø=0°)切割的KTP晶体作为倍频晶体. 考虑到c切Nd:YVO4跃迁截面较小,所以通过对谐振腔及晶体膜系的严格设计,减少腔内插入损耗和衍射损耗. 最终在脉冲重复率为10 kHz,抽运功率为11.2 W下,获得了最高570 mW的倍频黄光激光输出,对应抽运光到倍频黄光的转化效率约为
关键词:
拉曼激光
c切Nd:YVO4')" href="#">c切Nd:YVO4
589 nm
黄光激光 相似文献
4.
5.
报道了一台激光二极管(LD)端面抽运Nd:YVO4晶体腔内倍频和腔外和频相结合的声光调Q准连续355 nm 紫外激光器。采用LD端面抽运双侧翼键合YVO4基质的Nd:YVO4晶体,在腔内置入Ⅰ类相位匹配的LiB3O5(LBO)晶体进行倍频实现1 064 nm和532 nm双波长准连续激光输出,通过消色差透镜将双波长激光聚焦耦合到Ⅱ类相位匹配的LBO 晶体中进行和频,并采用双向和频光路,获得了高效率、高光束质量、高重复频率的准连续355 nm 紫外激光输出。在抽运功率为28.6 W、重复频率为20 kHz时,355 nm激光最大输出功率4.2 W,脉宽为20.6 ns,光-光转换效率为14.7%,激光器光束质量因子Mx2和My2分别为1.29和1.23。 相似文献
6.
介绍了一种高稳定性输出功率的连续LD抽运Nd∶YVO4全固态532 nm激光器,输出功率为144 mW,采用LD抽运Nd∶YVO4晶体,KTP晶体腔内倍频方式工作。该激光器采用热电制冷器(TEC)实现对LD、KTP晶体的高精度温控,其温控精度达到±0.1 ℃。建立了LD电流与输出功率的非线性曲线,通过硅光电池检测激光输出功率实现激光功率实时光反馈,采用阈值式PI控制算法进一步降低稳态误差,通过对抽运驱动电流实施反馈控制获得了波动小于±1%的长时间高稳定功率输出。 相似文献
7.
8.
报道了一种高效率的2 μm光学参量振荡器. 利用1.064 μm声光调Q Nd:YVO4激光器抽运基于氧化镁掺杂周期性极化铌酸锂的内腔式光学参量振荡器, 在简并状态实现了稳定高效的2 μm激光输出. 当808 nm激光二极管抽运功率为20 W, Q开关工作频率为15 kHz时, 产生了平均功率为3.5 W、脉冲宽度为1.4 ns的2 μm激光, 光-光转换效率为17.5%, 斜效率为25%. 据我们所知, 该转换效率在2 μm波段内腔式光学参量振荡器中是最高的. 相似文献
9.
报道了一台激光二极管端面抽运Nd:YVO4晶体内腔三倍频355 nm激光连续输出的全固态紫外激光器.激光腔采用紧凑型简单凹平直腔,腔长仅为70 mm.利用两块LBO晶体进行腔内倍频、和频,当注入抽运功率为2527 W时,获得最大功率为306 mW的355 nm连续波输出,光光转换效率为012%,输出功率短期不稳定性为53%,355 nm激光输出光束质量良好.通过采用内腔倍频技术和设计合理的腔参数,实现了中小功率连续输出的全固态紫外激光器的小型化、便携化,进一步拓宽了紫外激光器
关键词:
激光二极管端面抽运
内腔三倍频
连续波
355 nm激光 相似文献
10.
分析和报道了受激粒子能量上转换(ETU)效应对Cr:YAG 被动调Q Nd:YAG/Nd:YVO4激光器的输出脉冲影响研究.结合ETU理论分析和被动调Q速率方程组,得到了初始反转粒子密度,末态反转粒子密度和光强最大时反转粒子密度的比值变化对激光输出脉冲宽度和脉冲能量的影响,和实验结果相一致.同时讨论了降低ETU效应的方法,有助于这类被动调Q激光器的优化设计.
关键词:
受激粒子能量上转换
Cr:YAG饱和吸收体
被动调Q 相似文献
11.
We demonstrated a diode-end-pumped continuous-wave 914 nm laser using a novel grown-together YVO4/Nd:YVO4 crystal for the first time. A maximum output power at 914 nm of 7.5 W with an optical-optical efficiency of 16.3% and a slope
efficiency of 24.3% was obtained when the incident pump power was 46.2 W. The beam quality factor M
2 was 3.2 at the output power of 6.0 W. The quality and specification of the grown-together composite YVO4/Nd:YVO4 crystal should be improved. Meanwhile, energy-transfer upconversion spectrum of the composite YVO4/Nd:YVO4 crystal laser was also investigated. 相似文献
12.
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
13.
14.
Yang Liu Jiasheng Ni Ying Shang Haifeng Qi Chen Wang Wenan Zhao Bing Cao Sheng Huang Chang Li Chang Wang 《Journal of Russian Laser Research》2018,39(6):585-590
We demonstrate an intracavity-triggered passively Q-switched Nd:YVO4 laser within a diode-end-pumped configuration. We employ a Cr4+:YAG saturable absorber as the passive Q switch and an Nd:LiYF4 (YLF) laser as the laser triggering of the Q-switched laser. Since we use the same Cr4+:YAG crystal and output coupler with the Nd:YVO4 laser, the Cr4+:YAG Q switch is triggered inside the Nd:YLF laser cavity. As a result, the timing jitter in standard deviation of Nd:YVO4 laser can be reduced to 16 ns. 相似文献
15.
Zhengping Wang Lianke Sun Shaojun Zhang Xianlin Meng Ruiping Cheng Zongshu Shao 《Optics & Laser Technology》2001,33(1):63
The absorption properties of Nd:YVO4 crystals with various doping levels and lengths are reported. The effective stimulated emission cross-sections of different doping levels are calculated with measured upper-level lifetimes. Our investigation gives good advice on the optimization of LD end-pumped Nd:YVO4 laser. 相似文献
16.
A sum-frequency yellow-green laser at 554.9 nm is reported by this paper, 946 nm wavelength is obtained from 4F3/2-4I9/2 transition in Nd:YAG and 1342 nm wavelength is obtained from 4F3/2-4I13/2 transition in Nd:YVO4. Using a doubly folded-cavity type-II critical phase matching KTP crystal intra cavity to make 946 nm laser from Nd:YAG and 1342 nm laser from Nd:YVO4 frequency summed, with incident pumped power of 30 W in Nd:YAG and 20 W in Nd:YVO4, TEM00 mode yellow-green laser at 554.9 nm at 1.15 W is obtained and its M2 factor is less than 1.22. The experimental results show that the Nd:YAG and Nd:YVO4 crystals intra-cavity sum-frequency mixing is an effective method for yellow-green laser and it can be applied to other two laser crystals to obtain more all-solid-state lasers with different wavelengths. 相似文献
17.
The thermal effect and the heat generation in diode-end-pumped continuous-wave 914-nm Nd:YVO4 lasers are investigated in detail. A theoretical model of a diode end-pumped solid-state laser is constructed to analyse the influence of fractional thermal loading on the thermal effect in the Nd:YVO4 laser based on finite element analysis. The thermal focal lengths and the end-surface deformations of laser rods in Nd:YVO4 quasi-three-level and four-level lasers are measured and compared with the results obtained by ordinary interferometry for the demonstration of higher thermal loading in 914-nm laser. Finally the fractional thermal loading in the Nd:YVO4 quasi-three-level laser is calculated by matching the experimental and the simulated end deformations. 相似文献
18.
We report a high repetition rate Q-switched Nd:YVO4/Cr4+:YAG micro laser with small pump power. Unwanted defects in pulse train, which are inherently large in passively Q-switched
laser, was simply minimized by controlling temperature of Nd:YVO4/Cr4+:YAG medium. When T
0 = 90% Cr4+:YAG and R
OC = 90% output coupler were used, Q-switched Nd:YVO4/Cr4+:YAG micro laser showed the optimum output; maximum output power of 58 mW, optical-to-optical efficiency of 9.1%, repetition
rate of 1.1 MHz, and pulse width of 57 ns were achieved with 640 mW pumping. MHz-order repetition rate in Nd:YVO4/Cr4+:YAG Q-switched laser with low pumping (<1 W) is the highest value to the best of our knowledge. 相似文献
19.
Beam quality factor (M2) and far-field scattering angle of LD end-pump Nd : YVO4 laser were measured by slit-scanning method. The experimental results showed that the laser operated on a multi-mode state. The corresponding analytical treatments for slit-scanning method and M2 factor measurement also were presented in this paper. 相似文献
20.
Thermal effect of laser crystal is a very important factor for solid lasers. The most of heat is generated from the quantum
loss between pump light and lasing light. If a longer wavelength of pump light is adopted, quantum loss and quantum loss efficiency
can be reduced and improved, respectively. In this paper, a Nd:YVO4 laser end-pumped by 887 nm LD is reported. Output power of 25 W is obtained from a single Nd:YVO4, when the crystal absorbs pump light power of 38 W. The corresponding opto-optic conversion efficiency is up to 65.7%. When
30.7 W pump light is absorbed in the crystal, 19.4 W TEM00 is obtained with M
x
2 = 1.30, M
y
2 = 1.26 and opto-optic conversion efficiency of 63.2%. The laser can work at the Q-switched mode. The uniform pulses are generated
at high repetition of 100 kHz. And the conditions of pulse stability are analyzed in this paper. 相似文献