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运用矩阵光学的方法对多棒串接固体激光器的谐振腔参数及其在平平腔时的热稳条件进行了研究,并计算了六棒串接平平腔固体激光器的稳定区.结果证明:多棒串接固体激光器的稳定区和非稳区相互间隔,在平平腔总腔长、激光棒数量n和棒间距L一定的条件下,当采用对称结构时(L1=L2),则谐振腔的每段稳定区均达到最大;且只要 平平腔满足L1=L2=L/2以及热焦距f在大于某个下限值fm时,稳定性条件01<
关键词:
多棒串接固体激光器
稳定区
热稳条件 相似文献
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通过将光学腔与外围热屏蔽层之间的热传递模型等效为多级电阻电容(RC)积分电路,计算得到光学腔的温度对外界环境温度变化的响应特性。用此方法探讨了当热屏蔽层的质量被限定时,热屏蔽层与光学腔的距离、热屏蔽层的层数和厚度对光学腔的温度响应特性的影响。分析结果表明,热屏蔽层与光学腔的距离从40 mm减小至5mm,可使光学腔的温度响应时间增加1倍;当热屏蔽层的层数从1层增加至3层,且增加光学腔的最内层热屏蔽层的厚度,可使光学腔的温度对快速的环境温度变化的敏感度减小1个数量级以上。通过优化后的光学腔的热屏蔽层设计,有望提高锁定于光学腔的稳频激光的频率稳定度。 相似文献
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大功率部分端面抽运混合腔板条激光器 总被引:18,自引:4,他引:18
在半导体抽运的全固态激光器中,激光晶体上的热畸变限制了激光器在大功率下输出时保持高光束质量的能力。板条结构的固体激光器具有优异的散热能力,再配合部分端面抽运以及稳一非稳柱面混合腔的使用,使大功率高光束质量的激光输出成为可能。在德国EdgeWave GmbH进行的对这一技术的合作研究中,利用不到100mm的腔长,在Nd:YVO4板条激光器上获得了110W近衍射极限的1.06μm连续激光输出,这时在非稳腔方向上的光束传播因子M^2为1.3。在稳腔方向上为1.5。通过对输出激光进行空间滤波切除腔镜造成的衍射旁瓣后,50W输出时M^2的典型值在非稳腔和稳腔方向上分别为1.09和1.2。 相似文献
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用几何光学传输矩阵方法和讨论了热透镜对铜蒸气激光非稳腔振荡器和放大器输出特性的影响,获得了与实验相符的计算结果,并提出了在振荡-放大链内热透效应的补偿方法。 相似文献
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The thermal lensing properties of stable and unstable resonators are compared and rules are given for the design of optimized unstable resonators containing a focusing rod. Experimental verification with a high-power Nd: YAG system proved that for unstable resonators the restricting relationship between beam quality and output power no longer holds. Careful resonator design enables high output power to be extracted with unstable resonators without destroying the output couplers. 相似文献
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The thermal lensing properties of stable and unstable resonators are compared and rules are given for the design of optimized unstable resonators containing a focusing rod. Experimental verification with a high-power Nd: YAG system proved that for unstable resonators the restricting relationship between beam quality and output power no longer holds. Careful resonator design enables high output power to be extracted with unstable resonators without destroying the output couplers. 相似文献
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本文报道了采用非稳腔XeCl准分子激光泵浦铅蒸气获得52%喇曼能量转换效率.比较了稳腔与非稳腔XeCI激光泵浦下的喇曼转换特性. 相似文献
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E. F. Yelden H. J. J. Seguin C. E. Capjack S. K. Nikumb H. Reshef 《Optical and Quantum Electronics》1992,24(9):S889-S902
The output characteristics of several large-area multichannel unstable resonators are presented. The conventional unstable resonator and a novel toric unstable resonator, in both confocal and nonconfocal configurations, have been studied. Output beam profiles, optical energy extraction, beam focusability, resonator alignment properties and polarization states of the various resonators have been analysed in depth. 相似文献
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Unstable resonators have been widely used in high-power gas lasers as well as solid-state lasers. The phase and the spatial distribution of intensity of these lasers are very important in some applications such as material processing. In this paper, unstable resonators with three different geometries have been characterized numerically and the results have been compared and evaluated. Based on the Fresnel-Kirchhoff integral, the two-dimensional phase and intensity have been calculated for three different positive branch unstable resonators. The results show that the resonators with rectangular geometry have the best performance for near-field as well as far-field intensity, which is more suitable for material processing. The calculations also show that the maximum output power can be extracted from the rectangular resonator with spherical surface, while the circular resonator with spherical surface has minimum output power. The results also show that the laser has a higher divergence for the cylindrical resonator in compare with those for the circular and rectangular resonators. 相似文献
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The graded reflectivity mirror (GRM) unstable resonator has become the resonator of choice for many solid-state laser systems.
This tutorial review discusses through a step-by-step approach the inner workings of such resonators, in order to identify
for potential designers and users tradeoffs which are involved in their design. Geometrical and diffractive contributions
to the mode definition are discussed using a canonical formulation applicable to all types of unstable resonators. Particular
attention is given to super-Gaussian resonators, which are nowadays the most widely used. The beam-shaping action of an amplifying
medium is illustrated through a practical example, which makes clear the necessity to use a proper simulation software to
predict correctly the behaviour of the resonator.
This revised version was published online in November 2006 with corrections to the Cover Date. 相似文献
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The stability of laser resonators which contain a medium with a gain profile is investigated. Such resonators are unstable when the resonator mirrors are large (infinite aperture approximation), and the gain is lowest on the optical axis and increases with radial distance. It is shown that such resonators have well-defined regions of stability if the mirrors have gaussian reflectivity tapers. 相似文献
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Confocal and non-confocal negative branch unstable resonators with an intracavity spatial filter have been applied to a high-gain short-pulse UV preionized XeCl laser. The near- and far-field radiation characteristics have been investigated in both configurations. Laser beams of larger brightness have been obtained with non-confocal schemes. A maximum beam brightness of 1.3×1014 Wcm–2Sr–1 has been achieved. 相似文献