Mach-Zehnder interferometer using frequency-domain beamsplitter

Abstract

We demonstrated the first-order interference between coherent light at 1580 nm and 795 nm by using frequency-domain Mach-Zehnder interferometer (MZI). The MZI is implemented by two frequency-domain BSs based on a second-order nonlinear optical effect in a periodically-poled lithium niobate waveguide with a strong pump light. We achieved the visibility of over 0.99 at 50% conversion efficiencies of the BSs. Toward photonic quantum information processing, sufficiently small background photon rate is necessary. From the measurement results with a superconducting single photon detector, we discuss the feasibility of the frequency-domain MZI in a quantum regime. Our estimation shows that single photon interference with the visibility above 0.9 is feasible with practical settings.

arXiv comment9 pages, 7 figures

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• Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
• Engineering temporal-mode-selective frequency conversion in off-the-shelf nonlinear optical waveguides: From theory to experiment
• Color Erasure Detectors Enable Chromatic Interferometry
• Nonlinear Domain Engineering for Quantum Technologies
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• Characterization of Quantum Frequency Processors
• Design Methodologies for Integrated Quantum Frequency Processors
• On-chip frequency-bin quantum photonics
• Improved Spatial Resolution Achieved by Chromatic Intensity Interferometry
• Detecting the relative phase between different frequency components of a photon using a three-level $\Lambda$ atom coupled to a waveguide
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