Ammend Matthew J, Blank David A
Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA.
Opt Lett. 2009 Feb 15;34(4):548-50. doi: 10.1364/ol.34.000548.
A passively stabilized third-order optical interferometer that spatially separates the local oscillator and signal generation is demonstrated with long-term phase stability. The lack of spatial overlap eliminates unwanted contamination of either field. Fully independent optical control over both fields is exerted after the sample. This independence is taken advantage of with what we believe to be a new approach to scanning the relative phase between the local oscillator and signal that has very high precision and reproducibility. The independence of the fields is also exploited in a flexible balanced heterodyne detection scheme.
展示了一种被动稳定的三阶光学干涉仪，它在空间上分离本地振荡器和信号产生，具有长期相位稳定性。空间上的不重叠消除了任何一个场的不必要污染。在样品之后对两个场进行完全独立的光学控制。我们利用这种独立性，采用了一种我们认为是扫描本地振荡器和信号之间相对相位的新方法，该方法具有非常高的精度和可重复性。场的独立性还被用于一种灵活的平衡外差检测方案中。
