%0 Journal Article
%T Laser written waveguide photonic quantum circuits
%A G. D. Marshall
%A A. Politi
%A J. C. F. Matthews
%A P. Dekker
%A M. Ams
%A M. J. Withford
%A J. L. O'Brien
%J Physics
%D 2009
%I arXiv
%R 10.1364/OE.17.012546
%X We report photonic quantum circuits created using an ultrafast laser processing technique that is rapid, requires no lithographic mask and can be used to create three-dimensional networks of waveguide devices. We have characterized directional couplers--the key functional elements of photonic quantum circuits--and found that they perform as well as lithographically produced waveguide devices. We further demonstrate high-performance interferometers and an important multi-photon quantum interference phenomenon for the first time in integrated optics. This direct-write approach will enable the rapid development of sophisticated quantum optical circuits and their scaling into three-dimensions.
%U http://arxiv.org/abs/0902.4357v2