Wang L, Vaity P, Ung B, Messaddeq Y, Rusch L A, LaRochelle S
Opt Express. 2014 Jun 30;22(13):15653-61. doi: 10.1364/OE.22.015653.
The reflectogram of a fiber grating is used to characterize vector modes of an optical fiber supporting orbital angular momentum states. All modes, with a minimal effective index separation around 10(-4), are simultaneously measured. OAM states are reflected by the FBG, along with a charge inversion, at the center wavelength of the Bragg reflection peak of the corresponding fiber vector mode.
光纤光栅的反射图用于表征支持轨道角动量态的光纤的矢量模式。所有模式同时被测量，其最小有效折射率间隔约为10^(-4)。在相应光纤矢量模式的布拉格反射峰的中心波长处，轨道角动量态与电荷反转一起被光纤光栅反射。
