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1 March 2016 Engineering reconfigurable laser-written circuits for practical quantum metrology
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We fabricate a series of reconfigurable waveguide interferometers using laser machining techniques and charac- terize them classically. The 3D nature of the ultrafast laser writing technique allows for the fabrication of unique multi-arm interferometers not possible in planar platforms. We demonstrate selectivity between multiple phase shifters in a single interferometer by patterning the chip surface using picosecond laser ablation in a separate step. Microfluidic elements for making practical measurements on-chip are incorporated by machining channels within the substrate to interact with waveguide modes. Our results provide a path toward practical implementation of quantum metrology protocols requiring multiple interferometer arms and tunable phases.
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Zachary Chaboyer, Alex Stokes, M. J. Steel, and Michael J. Withford "Engineering reconfigurable laser-written circuits for practical quantum metrology", Proc. SPIE 9750, Integrated Optics: Devices, Materials, and Technologies XX, 97500U (1 March 2016);

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