Influences of spherical aberration on resonator's stable zones and fundamental mode output power scaling of solid state laser oscillators.
Influences of spherical aberration on resonator's stable zones and fundamental mode output power scaling of solid state laser oscillators.
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DOI：
10.1364/oe.20.010605
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发表时间：
2012-05
期刊：
影响因子：
3.8
通讯作者：
Z. Zhao;Sunqiang Pan;Z. Xiang;Yantao Dong;J. Ge;Chong Liu;Jun Chen
中科院分区：
文献类型：
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作者：
Z. Zhao;Sunqiang Pan;Z. Xiang;Yantao Dong;J. Ge;Chong Liu;Jun Chen
引入了表征热透镜球差强度的参数x，从理论上分析了热透镜球差对谐振腔稳定区的影响。得到了一些新的有用的结果。对于对称的平-平谐振腔，球差只影响稳定区的后沿。对于非对称平-平腔，球差对两个稳定区的后边缘和第二稳定区的前边缘都有影响。指出了横模崩塌对TEM 00模的影响以及不同阶横模的稳定区分离，为固体激光振荡器TEM 00模输出功率定标提供了依据。讨论了谐振腔的长臂长、短臂长、泵浦光半径等参数对各阶横模稳定区分离程度的影响。建立了高功率二极管双端泵浦Nd：YVO_4 TEM_（00）模激光振荡器的实验装置，并进行了实验研究。51.2在CW工作模式下，获得了1.2W的TEM 00模输出功率，光-光效率约为50%，光束质量因子M2为1.2。
A parameter x is introduced to characterize the strength of thermal lens spherical aberration, whose influences on resonator's stable zones are analyzed theoretically. Some new and helpful results are obtained. For symmetrical plane-plane cavity, spherical aberration has just influence on the back edge of stable zone. For asymmetrical plane-plane cavity, spherical aberration has influence on the back edges of the two stable zones and the front edge of the second stable zone. Effects of transverse mode collapsing to TEM00 mode and stable zones separation of different order's transverse modes are pointed out, which is the foundation of TEM00 mode output power scaling for solid state laser oscillator. Influences of parameters such as resonator's long arm length, short arm length, and pump beam radius on the extent to which of stable zones separation of different order transverse modes are discussed. An experimental setup of a high power diodes dual-end pumped Nd:YVO4 TEM00 mode laser oscillator is built up and investigated experimentally. 51.2 W TEM00 mode output power in CW operation is achieved with an optical-to-optical efficiency of about 50% and beam quality factor M2 being 1.2.