Accurate polarization preparation and measurement using twisted nematic liquid crystals

Abstract

Generation of particular polarization states of light, encoding information in polarization degree of freedom, and efficient measurement of unknown polarization are the key tasks in optical metrology, optical communications, polarization-sensitive imaging, and photonic information processing. Liquid crystal devices have proved to be indispensable for these tasks, though their limited precision and the requirement of a custom design impose a limit of practical applicability. Here we report fast preparation and detection of polarization states with unprecedented accuracy using liquid-crystal cells extracted from common twisted nematic liquid-crystal displays. To verify the performance of the device we use it to prepare dozens of polarization states with average fidelity 0.999(1) and average angle deviation 0.5(3) deg. Using four-projection minimum tomography as well as six-projection Pauli measurement, we measure polarization states employing the reported device with the average fidelity of 0.999(1). Polarization measurement data are processed by the maximum likelihood method to reach a valid estimate of the polarization state. In addition to the application in classical polarimetry, we also employ the reported liquid-crystal device for full tomographic characterization of a three-mode Greenberger--Horne--Zeilinger entangled state produced by a photonic quantum processor.

arXiv commentdata&code: https://github.com/BielakM/polarimeter

References in corpus (24)

• On the Measurement of Qubits
• Photonic quantum information processing: a review
• Photonic quantum information processing: a concise review
• Quantum state estimation
• Implementation of a Toffoli Gate with Superconducting Circuits
• Realization of the quantum Toffoli gate with trapped ions
• Minimal qubit tomography
• Scalable boson sampling with a single-photon device
• Quantum inference of states and processes
• Super-resolution Imaging of the Fluorescent Dipole Assembly with Polarized Structured Illumination Microscopy
• Choice of Measurement Sets in Qubit Tomography
• Entanglement of photons in their dual wave-particle nature
• Experimental Phase Estimation Enhanced By Machine Learning
• Experimental Polarization State Tomography using Optimal Polarimeters
• Statistical Estimation of Quantum Tomography Protocols Quality
• On-demand photonic entanglement synthesizer
• Efficient experimental estimation of fidelity of linear optical quantum Toffoli gate
• Statistical estimation of the quality of quantum-tomography protocols
• A high dynamic range optical detector for measuring single photons and bright light
• Entangled Photon Polarimetry
• Polarization preserving ultra fast optical shutter for quantum information processing
• Accuracy of minimal and optimal qubit tomography for finite-length experiments
• The optimal reordering of measurements for photonic quantum tomography
• Realizing quantum nodes in space for cost-effective, global quantum communication: in-orbit results and next steps

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• All-fiber microendoscopic polarization sensing at single-photon level aided by deep-learning