Abstract
The emerging strategy to overcome the limitations of bulk quantum optics consists of taking advantage of the robustness and compactness achievable by integrated waveguide technology. Here we report the realization of a directional coupler, fabricated by femtosecond laser waveguide writing, acting as an integrated beam splitter able to support polarization-encoded qubits. This maskless and single step technique allows us to realize circular transverse waveguide profiles which are able to support the propagation of Gaussian modes with any polarization state. Using this device, we demonstrate quantum interference with polarization-entangled states and singlet state projection.
- Received 18 June 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.200503
© 2010 The American Physical Society
Synopsis
Towards a handheld optical table
Published 10 November 2010
A new optical component for integrated photonic circuits could prove helpful for applications that store and transmit the information contained in linearly polarized light.
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