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A laser-diode pumped passive Q-switched Nd:YAG/Cr~(4+):YAG laser with quick tunable pulse-width capability is studied and experimentally demonstrated. By focusing the auxiliary controlling laser beam onto a Cr~(4+):YAG crystal and thereby changing the initial transmission of the Cr~(4+):YAG crystal, laser pulses with different pulse widths can be achieved. The obtained laser pulse width is tunable in the range of 550–1492 ps with a fixed cavity length of 7 mm. The laser can be used to achieve different pulse widths between two pulses in the range of sub-nanosecond to a few tens of nanoseconds. 相似文献
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在普通的开放式光腔自再现模式理论和波导模式理论的基础上,研究一种介于自由空间模式和波导模式之间的准波导模式. 在腔镜和波导口之间利用Fox-Li的衍射积分法,在波导内把电场离散到各个波导模式中. 经过多次迭代,分析了在介于波导尺寸和非波导尺寸之间的准波导内存在的稳定场,并对比了准波导模式、波导模式和高斯模式的不同,验证了其稳定场分布是一种类似于高斯模式和波导模式,但却不同于两种模式的新的电场分布. 相似文献
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An 880-nm laser-diode stack end-pumped cw 1342nm Nd:YVO4 slab laser with a compact positive confocal unstable-stable hybrid resonator is demonstrated. At absorbed pump power of 115 W, the output power 32.4 W is obtained. The slope efficiency and optical-to-optical conversion efficiency are 42% and 28.2%, respectively. At output power of 22 W, the stable direction M2 is 1.3 and the unstable direction M2 is 1.2. 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
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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
关键词: 相似文献
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本文采用固相焙烧法将SO2-4-MxOy固体超强酸负载于不同载体上,制备出分散负载SO2-4-MxOy型催化剂。戊烷异构化反应结果表明采用该法制备的催化剂具有强酸位,能在较低反应温度下,催化需要强酸位的反应。SEM,XRD等测试结果表明经焙烧后的SO2-4-MxOy在载体表面得到较好的分散,ZrO2以四方相存在。 相似文献
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We present an experimental study of a continuous-wave Nd: YVO4 laser diode-pumped directly in band at 880 nm. By using a compact positive confocal unstable-stable hybrid resonator, a maximal laser output of 170 W at 1064 nm is realized. The slope efficiency and optical-to-optical efficiency are 56.7% and 51.3%, respectively. The M2 factors in the unstable direction and in the stable direction they are 1.9 and 1.3, respectively. 相似文献