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光束变换光学的进展 第二部分:矩阵光学方法与李代数理论 总被引:1,自引:0,他引:1
在本文的这部分中,将矩阵光学方法和李代数理论用于分析非轴对称光学系统和光学列阵等对光束的变换,以及色散高斯脉冲的传输等问题。引入了一些新方法和有用的工具,如广义ABCD定律、李方法等,并举典型例说明其应用。 相似文献
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为保持器件结构紧凑型的同时获得稳定的高功率、高光束质量激光输出,将相移光学阵列谐振腔技术用于射频激励扩散型冷却板条波导CO2激光器.实验发现,该设计方案虽然波导结构为矩形宽波导,但是由于采用了具有相移阵列结构的全反射镜,获得的激光束输出空间分布具有阵列输出光束的基本特征.在波导截面为1mm×20mm、增益介质长度为20cm的波导结构条件下,获得了46W的激光功率输出和11.3%的电光转换效率.激光束输出的远场空间分布呈空间压缩的极锐单峰.由于该结构具有的选模特性,远场为单峰空间分布特
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高斯光束通过复杂光学系统的变换 总被引:1,自引:0,他引:1
使用矩阵光学技巧和方法详细研究了高斯光束通过复杂光学系统的传插问题。将结果推广于:(1)物像空间析射率不相等(n_1≠n_2);(2)光学系统矩阵元为复数或C元素为零的情况。就高斯限模光阑对光束传输的影响作了讨论。经典光学和高斯激光束光学(n_1≠n_2,n_1=n_2)的比较,清楚地说明了它们的区别和联系。 相似文献
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部分端面抽运混合腔板条激光器可以在紧凑的空间内实现大功率高光束质量的激光输出。利用这一技术并结合具有增益高、荧光寿命短等特点的Nd∶YVO4晶体 ,配合新型高重复率的电光Q开关 ,易于实现高频窄脉冲高光束质量的激光输出。在德国EdgeWaveGmbH进行了混合腔电光调Q激光器的合作研究中 ,实现了高重复率近衍射极限的输出 ;在以 5kHz的高重复率运转时 ,获得了单脉冲能量 7 2mJ ,脉宽 5 7ns,平均功率约 36W的脉冲 ;当重复率高达 5 0kHz时 ,输出的激光脉冲的参量是单脉冲能量 1.6mJ,脉宽 9 5ns,平均功率超过 80W。实验所测的光束质量因子M2 小于 2。 相似文献
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We present the measurements made on a medium power, 35 cm long, radio-frequency discharge CO2 slab laser operated in a pulsed regime obtained by switching the RF discharge. In this way, pulses with peak power up to 480 W at pulse repetition frequencies in the range 1 to 10 kHz have been obtained. Pulse energy and average extracted power have been experimentally characterized with respect to the pulse repetition frequency and to the pulse duration, and the pulse shape and characteristic times have been measured. We also investigated the propagation properties of the beam emerging from our laser. 相似文献
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Five and six-temperature models for the CO2–N2–He system are used to describe the process of the dynamic emission in the TEA CO2 laser. All physical constants and relaxation rates related to these models are examined to estimate the output pulse parameters as a function of the input parameters. The two pumping processes implemented; empirical function and differential equation show a good agreement with the experimental data. 相似文献
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室温下采用中心波长约970 nm准直输出的大功率激光二极管模块作为抽运源,端面抽运双程吸收的腔型结构,抽运原子数分数为8%的Yb:Y2O3多晶透明陶瓷片获得连续激光输出。抽运阈值功率为7 W,当抽运功率达到35 W时,获得优化连续激光输出功率为10.5 W,光光转换效率为30%,斜率效率为37.5%。激光输出功率随抽运功率基本呈线性增长。采用更高功率抽运源、优化谐振腔结构和减小热效应的影响,Yb∶Y2O3陶瓷激光器的输出功率和效率将会得到进一步提高。 相似文献
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The usual laser rate equations have been applied to fit energy and shape of pulsed emissions of RF CO2 single mode lasers starting from the discharge and cavity parameters. The model well reproduce the laser behaviour, if to fit the turn-off normally observed in these lasers we introduce a phase laser gain correction related to the frequency chirp. 相似文献
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In this paper we present a new discharge technique to excite slab CO2 lasers. A uniform stable glow discharge has been obtained in a volume of 3 × 30 × 446 mm3. Output power is 10 W, and a gain of 0.26% cm−1 has been obtained. 相似文献
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《Optics & Laser Technology》1989,21(6):377-380
Uncoated plane parallel windows made from ultra-transparent KCl and NaCl crystals, which were grown by ‘injecting the reactive atmosphere’ (IRA) technique, have been tested as output windows in a high-power, high-repetition TEA CO2 laser, in various resonator configurations. Output power densities per pulse of 2 to 6 MW cm-2, which are 40% to 60% less than with 50% reflective coated ZnSe, have normally been obtained. The laser performances did not change after one year of operation and more than 107 pulses per window. No laser damage has been observed. 相似文献
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射频激励扩散型冷却层叠式板条波导千瓦CO2激光器 总被引:3,自引:0,他引:3
提出了一种射频激励扩散型冷却层叠式板条波导CO2激光器结构,利用这种结构,从电极长度为500mm的激光器件中警告了1020W输出,其光电效率为10%。 相似文献