一种新型光学模式转换器

A Novel Optical Mode Converter

提出了一种梯度折射率分布介质为基质的单体光学模式转换器,可以将两正交截面内瑞利长度相同、光腰重合的厄米高斯光束转换为拉盖尔高斯光束.这种转换器具有一体化且只有两个反射面的特点,因此易于调整、光能反射损耗小;对于两正交截面内瑞利长度不同、光腰不重合的厄米高斯光束,提出了一种可调节其瑞利长度和光腰位置的光腰调节器,将光腰调节器与单体光学模式转换器组合使用,也可以将这种厄米高斯光束转换为拉盖尔高斯光束.

A novel unitary optical mode converter was proposed, which can transform Hermite-Gaussian beams with the same Rayleigh range and waist position into Laguerre-Gaussian beams. Being unitary and having only two reflecting faces, the mode converter was easily adjusted and had very small reflecting loss. In view of the Hertmite-Gaussian beams with different Rayleigh range and waist position, a waist adjuster was proposed. Such Hertmite-Gaussian beams can also be transformed into Laguerre-Gaussian beams by combining the adjuster and the converter.