排序方式: 共有11条查询结果,搜索用时 15 毫秒
1.
We develop a compact and high-energy Nd:YAG slab laser system consisting of an oscillator and an amplifier for space applications. The oscillator is a diode-side-pumped electro-optically Q-switched slab laser with a cross-Porro resonator. The KD*P Pockels cell with a low driving voltage of 950 V is used to polarization output coupling. The amplifier is a Nd:YAG zigzag slab pumped at bounces. The maximum output pulse energy of 341 m3 with 13 ns pulse duration is obtained from the system at the repetition rate of 20 Hz and the beam quality factors are M2=3.1 and M2=3.5. The beam pointing stabilities of the laser system are 3.05μrad in the X-direction and 3.99 grad in the Y-direction, respectively. 相似文献
2.
A high repetition rate,compact micro-pulse all-solid-state laser is designed.The diffusion bonded crystal of YAG,Nd:YAG,and Cr~(4 ):YAG is taken as a monolithic cavity.The optimized initial transmission, output coupling,and pumping size of Cr~(4 ):YAG are calculated.The experimental results show that the laser satisfies the requirement of a spaceborne laser range finder. 相似文献
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A diode-end-pumped electro-optic (EO) Q-switched green laser operating at the repetition rate of 20 kHz is reported. A block of La3Ga5SiO14 (LGS) single crystal is used as a Q-switch and the type I phase- matching LiB305 (LBO) is used as the nonlinear crystal in the second harmonic generation. The 2.3-W average power of 532-nm green laser is obtained at the repetition rate of 20 kHz with the pulse width as short as 10 us. When the output power is about 1.5 W, the measured power fluctuation is less than 1.4% (root-mean-square. RMS) with the beam quality factor of M^2 〈 2 in both orthogonal directions. 相似文献
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A novel dual-slab laser with an off-axis one-sided stable-unstable resonator which can compensate for thermal distortion to some extent by flipping the optical beam is described in this paper. The output power, efficiency, and near-field and far-field intensity distributions of the dual-slab laser have been studied. The restdts indicate that the novel dual-slab laser has better performance than the normal dual-slab laser with the same off-axis one-sided stable-unstable resonator. 相似文献
5.
A compact passively Q-switched Yb:YAG microchip laser is demonstrated.Featuring a semiconductor saturable-absorber mirror(SESAM),the laser yields pulses of 219 ps when the length of the microchip Yb:YAG crystal is 100 μm and the beam quality is M2< 1.3.To the best of our knowledge,pulses from the proposed laser are the shortest Q-switching pulses obtained from Yb:YAG microchip lasers currently available. 相似文献
6.
提出一种新的激光增益介质板条抽运结构,这种结构能对由激光增益介质板条温度分布不均所造成的波面热畸变实现自校正,并建立了这种抽运结构下激光增益介质板条的瞬态温度分布理论模型,通过解热传导方程,推导出板条增益介质的瞬态温度分布的解析表达式。同时对抽运参量分别为抽运脉冲能量为5.8×104J、抽运重复频率为2Hz和抽运脉冲能量为3.2×104J、重复频率为10Hz两种情况下两种下N-31型钕玻璃板条的瞬态温度分布分别进行了数值计算,分别给出两种情况下10s内和60s时钕玻璃板条的温度分布图并对结果进行了分析和对比,表明采用这种抽运结构的增益介质板条激光器可以以类似热容激光器的方式在短时间内实现高平均功率、高光束质量运转。 相似文献
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Comparison of different side-pumping configurations for high power laser diode pumped solid-state laser 总被引:5,自引:0,他引:5
Ray-tracing method is used to simulate the distribution of absorption in crystal rod for different side-pumping configuration. The distribution of pumping power and absorption efficiency is compared, and the numerical results are presented. The results show that the more uniform pumping and the higher absorption coefficient are obtained with a diffuse cavity. And the method of the slow axis of laser diode stack perpendicular to the axis of lasing gives the higher central pumping density. 相似文献
9.
锯齿形板条抽运结构的热效应数值比较 总被引:3,自引:0,他引:3
激光二极管抽运的全固态激光器中,除了激光介质的温度分布和热透镜效应以外,抽运、冷却结构对获得高光束质量、高功率激光输出至关重要。基于热传导方程,在相同的抽运功率和传导冷却边界条件下,对单侧面抽运锯齿形(zigzag)板条、单侧面键合锯齿形板条、部分抽运板条三种不同抽运结构的温度分布、热致应力、温度导致的折射率变化进行了详细的分析,并通过光线追迹方法,比较了光束在锯齿形面内和垂直于锯齿形面内的光程差,由光程差曲线分析了激光束的热透镜效应。对三种抽运结构的端面温度、端面变形和端面变形导致的光程差也进行了对比分析。结果表明,三种抽运结构在锯齿形面内的光束均表现为发散特性,在垂直于锯齿形面内的光束表现为热聚焦效应,温度导致的热聚焦特性相差不是很大。而在消除端面效应方面,键合激光板条具有明显优势。最后,提出了热透镜效应的补偿方法。 相似文献
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