Short-length and robust polarization rotators in periodically poled lithium niobate via shortcuts to adiabaticity
Short-length and robust polarization rotators in periodically poled lithium niobate via shortcuts to adiabaticity
复制标题
通过绝热性的捷径在周期性极化铌酸锂中实现短长度和稳健的偏振旋转器
DOI：
10.1364/oe.22.024169
复制
发表时间：
2014-10-06
期刊：
影响因子：
3.8
通讯作者：
Tseng, Shuo-Yen
中科院分区：
文献类型：
--
作者：
Chen, Xi;Wang, Hong-Wei;Tseng, Shuo-Yen
基于准相位匹配(QPM)技术的周期极化铌酸锂(PPLN)晶体中，传统的窄带光谱极化器件具有短而不强的特点。在本文中，我们利用绝热的捷径提出了短长度和健壮的偏振旋转器。在准相位调制条件下，用不变动力学方法设计了PPLN晶体的电场和周期，并根据输入波长和折射率的变化进行了进一步的优化。此外，还讨论了PPLN晶体的转换效率对电场和周期的稳定性。因此，最优捷径是快速和稳健的，这为宽带光谱偏振器件提供了较短的长度。(C)2014年美国光学学会
Conventional narrowband spectrum polarization devices are short but not robust, based on quasi-phase matching (QPM) technique, in periodically poled lithium niobate (PPLN) crystal. In this paper, we propose short-length and robust polarization rotators by using shortcuts to adiabaticity. Beyond the QPM condition, the electric field and period of PPLN crystal are designed in terms of invariant dynamics, and further optimized with respect to input wavelength/refractive index variations. In addition, the stability of conversion efficiency on the electric field and period of PPLN crystal is also discussed. As a consequence, the optimal shortcuts are fast as well as robust, which provide broadband spectrum polarization devices with short length. (C) 2014 Optical Society of America