Direct temporal mode measurement for the characterization of temporally multiplexed high dimensional quantum entanglement in continuous variables
arXiv:1910.09102 · doi:10.1103/PhysRevLett.124.213603
Abstract
Field-orthogonal temporal mode analysis of optical fields is recently developed for a new framework of quantum information science. But so far, the exact profiles of the temporal modes are not known, which makes it difficult to achieve mode selection and de-multiplexing. Here, we report a novel method that measures directly the exact form of the temporal modes. This in turn enables us to make mode-orthogonal homodyne detection with mode-matched local oscillators. We apply the method to a pulse-pumped, specially engineered fiber parametric amplifier and demonstrate temporally multiplexed multi-dimensional quantum entanglement of continuous variables in telecom wavelength. The temporal mode characterization technique can be generalized to other pulse-excited systems to find their eigen modes for multiplexing in temporal domain.
arXiv comment7 pages, 7 figures
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- Time-domain measurement of ultra-fast intensity difference squeezed pulse pairs generated in fiber
- Propagation of temporal mode multiplexed optical fields in fibers: influence of dispersion
- Direct temporal mode measurement of photon pairs by stimulated emission
- Multimode optical parametric amplification in the phase-sensitive regime
- Mode Structure of a Broadband High Gain Parametric Amplifier
- Completely characterizing multimode nonlinear-optical quantum processes