arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1405.2610physics.opticsquant-ph
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外腔中轨道angular momentum光的高效率SHG

High efficiency SHG of orbital angular momentum light in an external cavity

Zhi-Yuan Zhou, Yan Li, Dong-Sheng Ding, Yun-Kun Jiang, Wei Zhang, Shuai Shi, Bao-Sen Shi, Guang-Can Guo

摘要:

产生轨道角动量光的传统方法包括全息衍射光栅、涡旋相位板和空间光调制器。在这篇文章中,我们报告了一种新的高效OAM光产生方法。通过泵浦含有准相位匹配非线性晶体的外腔,并适当调整腔面,实现了泵浦光与腔面高阶拉盖尔-高斯(LG)模的模式匹配,获得了高达10.3%的转换效率。我们首次证明了该腔可以稳定地工作在高阶LG模,就像高斯模一样。相对于泵浦光,SHG光具有两倍的OAM值。详细讨论了影响光束质量和转换效率的参数。我们的工作在激光光学领域开辟了一个全新的领域,并朝着高效率OAM光处理迈出了第一步。

英文摘要:

Traditional methods for generating orbital angular momentum (OAM) light include holographic diffraction gratings, vortex phase plate and spatial light modulator. In this article, we report a new method for high efficient OAM light generation. By pumping an external cavity contains a quasi phase matching nonlinear crystal with a fundamental OAM carrying light and properly aligning the cavity, mode matching between the pump light and the cavitys higher order Laguerre-Gaussian (LG) mode is achieved, conversion efficiency up to 10.3 percentage have been obtained. We have demonstrated that the cavity can stably operate at its higher order LG mode just as Gaussian mode for the first time. The SHG light possesses a doubled OAM value with respect to the pump light. The parameters that affect the beam quality and conversion efficiency are discussed in detail. Our work opens a brand new field in laser optics, and makes the first step toward high efficiency OAM light processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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