Tavrov Alexander V, Nishikawa Jun, Tamura Motohide, Abe Lyu, Yokochi Kaito, Kurokawa Takashi, Takeda Mitsuo
National Astronomical Observatory of Japan, Tokyo, Japan.
Appl Opt. 2007 Oct 1;46(28):6885-95. doi: 10.1364/ao.46.006885.
A three-dimensional common-path interferometer is proposed, which can achromatically null out an on-axis source while maintaining the detectability of an off-axis source. A geometric phase in the three-dimensional interferometer introduces an achromatic pi-phase shift to the light from the on-axis source, such that destructive interference nulls out the axial light at one of the ports of the interferometer. Light from the off-axis source, which is exempt from destructive interference, comes out from both ports with equal intensity. The common-path scheme makes the system highly immune to environmental disturbances. In the described experiment, a 6x10(-6) peak-to-peak nulling contrast was obtained.
提出了一种三维共光路干涉仪，它可以在消除轴上光源的同时保持轴外光源的可探测性。三维干涉仪中的几何相位会给来自轴上光源的光引入一个消色差的π相移，从而在干涉仪的一个端口处产生相消干涉，消除轴向光。来自轴外光源的光不受相消干涉影响，以相等强度从两个端口出射。共光路方案使系统对环境干扰具有高度免疫力。在所描述的实验中，获得了6×10^(-6)的峰峰值消光对比度。
