Characterization of optical quantum circuits using resonant phase shifts

M. Poot, H. X. Tang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We demonstrate that important information about linear optical circuits can be obtained through the phase shift induced by integrated optical resonators. As a proof of principle, the phase of an unbalanced Mach-Zehnder interferometer is determined. Then, the method is applied to a complex optical circuit designed for linear optical quantum computation. In this controlled-NOT gate with qubit initialization and tomography stages, the relative phases, as well as the coupling ratios of its directional couplers, are determined.

Original languageEnglish
Article number131106
JournalApplied Physics Letters
Issue number13
StatePublished - 26 Sep 2016
Externally publishedYes


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