We design and realise a hybrid interferometer consisting of three paths based on integrated as well as on bulk optical components. This hybrid construction offers a good compromise between stability and footprint on one side and means of intervention on the other. As experimentally verified by the absence of higher-order interferences, amplitude and phase can be manipulated in all paths independently. In conjunction with single photons, the setup can, therefore, be applied for fundamental investigations on quantum mechanics.
@article{arxiv.1606.01068,
title = {Hybrid waveguide-bulk multi-path interferometer with switchable amplitude and phase},
author = {Robert Keil and Thomas Kaufmann and Thomas Kauten and Sebastian Gstir and Christoph Dittel and René Heilmann and Alexander Szameit and Gregor Weihs},
journal= {arXiv preprint arXiv:1606.01068},
year = {2016}
}