Radially polarized laser beam from a Nd:YAG laser cavity with a c-cut YVO4 crystal
Radially polarized laser beam from a Nd:YAG laser cavity with a c-cut YVO4 crystal
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DOI：
10.1007/s00340-007-2622-x
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发表时间：
2007-04
期刊：
影响因子：
--
通讯作者：
Y. Kozawa;K. Yonezawa;S. Sato
中科院分区：
文献类型：
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作者：
Y. Kozawa;K. Yonezawa;S. Sato
我们演示了通过简单地将未掺杂的c切YVO_4晶体插入Nd：YAG激光腔中来产生径向偏振光束。在半球形腔中，圆柱对称，正双折射的YVO4晶体扩展了腔长的稳定性极限的非常光线（径向偏振）相比，普通的（方位角偏振）。通过调节腔长，选择性地获得了输出功率高达1 W的径向偏振光束。此外，通过腔的设计，还可以产生高阶横模。本文所证明的方法可以很容易地应用于具有各向同性激光介质的激光系统。
We demonstrate the generation of a radially polarized beam by simply inserting an undoped c-cut YVO4crystal into a Nd:YAG laser cavity. In a hemispherical cavity, the cylindrically symmetric, positive birefringence of the YVO4crystal extends the stability limit of the cavity length for an extraordinary ray (radial polarization) compared to an ordinary one (azimuthal polarization). By adjusting the cavity length, a radially polarized beam with an output power up to 1 W was selectively obtained. In addition, a higher-order transverse mode was also generated by arranging the cavity design. The method demonstrated in this paper can be readily applied to laser systems with an isotropic laser medium.