共查询到19条相似文献,搜索用时 78 毫秒
1.
2.
LD泵浦的Nd:YAG调Q激光器腔内倍频研究 总被引:1,自引:0,他引:1
DPL的调Q倍频是获得高重复率绿光输出的有效方法,本文研究了这种激光器的动态特性,提出存在使转换效率最高的最佳非线性耦合系数,它是调Q时反转粒子数超阈值倍数的函数.实验用国产200mWR的MQW—LDA泵浦Nd:YAG激光器,声光调Q,KTP腔内倍频,输出0.4μJ的倍频光,脉宽70ns,峰功率6W. 相似文献
3.
报道准连续60W激光二极管列阵侧面泵浦Nd:YLF固体激光器的研究结果,当器件的动转重复频率为30Hz时,得到4.4mJ的1.047μm激光输出,光-光转换效率达到18.3%,斜率效率达24.4%。声光和电光调Q,得到能量为2.2mJ,脉宽分别为50ns和30ns的脉冲输出。 相似文献
4.
5.
6.
利用半导体激光器(LD)连续单端泵浦Nd:YVO4晶体,实现了声光调Q输出1 064nm的短脉冲。分析并用实验验证了不同透过率输出耦合镜及不同重复频率条件下,输出调Q脉冲能量、脉冲宽度及平均输出功率的规律。在泵浦功率为20.7W,重复频率为50kHz时,获得了最大平均输出功率为5.72W的脉冲,光 光转换效率为28%,斜效率为32.4%;在重复频率为10kHz时,最大单脉冲能量为0.286mJ,脉宽为22ns,峰值功率为13kW。 相似文献
7.
8.
为了实现高可靠、窄脉宽、高峰值功率激光输出,采用侧面泵浦技术和电光调Q技术,设计出一种激光二极管侧面泵浦电光调Q全固态绿光激光器。采用结构简单、紧凑的平-平腔设计,其端镜和输出镜均为平面镜,获得较稳定的侧面泵浦Nd∶YAG腔外倍频KTP脉冲绿光激光输出。当泵浦电流为120A,重复频率为600Hz时,获得脉冲绿光的最高输出平均功率为3.62W,1064nm到532nm的转换效率为15.3%,其脉宽为21ns,峰值功率为300kW, 单脉冲能量为6.01mJ。实验结果表明:该激光器稳定性可靠,输出激光脉宽较窄、峰值功率高。 相似文献
9.
报道了用两个1.5W激光二极管偏振耦合端面泵浦的声光调Q内腔倍频Nd:YAG激光器。输出532nm绿光重复频率1KHz时,最大峰值功率为2.23KW,最窄脉宽为18ns,平均功率40mW。最高重复频率30KHz。重复频率15kHZ时,最高平均率128mW。对声光调Q内倍频Nd:YAG激光器的动态特性进行了理论分析及计算。 相似文献
10.
根据速率方程,研究了二镜腔Nd:YAG双波长调Q激光的振荡机理.通过分析不同透过率下的竞争过程,研究了双波长激光振荡的特点.研究结果表明,在调Q过程中1319nm激光的调Q脉冲起振时间滞后于1064nm激光,并且其最终调Q脉冲来自调Q之后的第一个弛豫振荡尖峰,是该弛豫振荡抑制掉其他弛豫振荡后的结果.通过振荡机理分析,得到了双波长脉冲输出能量相当的透过率条件.
关键词:
双波长
调Q激光
速率方程
弛豫振荡 相似文献
11.
We report on a passively Q-switched end pumped Nd:YLF laser including a noncritically phase-matched KTP singly resonant intracavity
optical parametric oscillator (IOPO-KTP). For the Q-switching operation we have used Cr:YAG saturable absorber. The optimized
passively Q-switched Nd:YLF laser without IOPO generated linearly polarized pulses of 11.5 ns and 1.07 mJ at 1047 nm. The
conversion efficiency of the optimized Q-switched pulse energy at 1047 nm to 1547 nm of a signal approached about 47%. For
optimizing both Nd:YLF laser and IOPO we have numerically solved a theoretical model. We have achieved 1.6-ns duration pulses
at 1547 nm with energy of 0.5 mJ and peak power of above 300 kW. The beam quality was excellent (M2 ≈1). 相似文献
12.
13.
14.
In an actively mode-locked laser, self-phase modulation can make pulse shorter at the expanse of causing instability at high pumping power. Using fast switching on the acousto-optic modulator, we can generate an actively mode-locked pulse train with shorter pulse width and higher average power than that driven by a sinusoidal signal. A 9-ps pulse train was generated in a mode-locked laser with an average power of 600 mW whose power level, to our knowledge, is the highest for diode-pumped and mode-locked Nd:YLF lasers. 相似文献
15.
A novel, compact diode-end-pumped conductively cooled Q-switched Nd:YLF laser is developed. A diode-end-pumped pair of Nd:YLF slabs and an intracavity-frequency-doubled configuration are adopted to increase conversion efficiency. Using 49.8-mJ incident pump pulse energy at 500-Hz repetition rate, the laser obtains 11-mJ pulse energy and 5.5-W average output power at 527-nm wavelength, achieving an optical-optical conversion efficiency of 22%. The pulsewidth is less than 15 ns, and the beam quality factors are Mx2=1.28 and M y2=1.12. 相似文献
16.
H. Yang Z. T. Jia B. T. Zhang J. L. He S. D. Liu Y. Yang X. T. Tao 《Laser Physics》2012,22(5):880-884
We report a Nd:LGGG laser at 1062 nm in the operations of the continuous-wave (CW) and passively Q-switching. The maximum
CW output power of 5.62 W was obtained, corresponding to an optical-to-optical conversion efficiency of 49.0% and slope efficiency
of 55.9%. By using Cr4+:YAG with initial transmission of 94% as the saturable absorber, for the first time, we got the maximum passively Q-switched
output power of 1.21 W, accompanied with a highest pulse repetition rate of 27.1 kHz and a shortest pulse width of 9.1 ns. 相似文献
17.
We have studied the laser performance of Nd: KGW and Nd: YAG rods by monitoring the 1.06 μm laser emission at 78.5 K and 300 K. Our observations indicate that the laser efficiency from Nd: KGW is much higher than from Nd: YAG at these two temperatures. The laser threshold in Nd: KGW is lower at 78.5 K than at 300 K but it is always lower than that in Nd:YAG. 相似文献
18.
A diode-pumped passively Q-switched Nd:YLF laser was demonstrated by using saturable absorber of Cr4+:YAG. At the incident power of 7.74 W, pure passively Q-switched laser with per pulse energy of 210 Μj and pulse width of 19.6 ns at repetition rate of 1.78 kHz was obtained by using Cr4+:YAG with initial transmission of 80%. At the incident power of 8.70 W, a Q-switched mode-locking with average output power of 650 Mw was achieved, the overall slop efficiency was 16%, corresponding to the initial transmission of 85% of Cr4+ :YAG. 相似文献
19.
In this paper, we describe a Nd:YLF laser based on high-speed RTP electro-optical cavity dumping technique. Two home-made 150 W fiber pump modules are used from both sides to pump Nd:YLF crystal. Coupling systems are the key elements in end-pumped solid-state lasers, the aberrations of which greatly affect the efficiency of the lasers. In order to get high efficient and good quality laser output, the optical software ZEMAX is used to design a four-piece coupling system. When the pumped energy is 32 mJ at the repetition rate of 1 Hz, the output energy is 6.5 mJ with 2.5 ns pulse width. When the pumped energy is 13.1 W at the repetition rate of 200 Hz, the output energy is 2.2 W with small M 2 factor where M x 2 is 1.04, and M y 2 is 1.05, and the light-light conversion efficiency is up to 16.8%. 相似文献