Direct temporal mode measurement of photon pairs by stimulated emission

Chen, Xin; Li, Xiaoying; Ou, Z. Y.

doi:10.1103/physreva.101.033838

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…Nevertheless, the feedbackiteration idea in the current method can still be applied to the low gain case by involving the stimulated emission in the idler field. The detail is presented in another paper [41].…”

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confidence: 99%

Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables

Huo

Liu

et al. 2020

Phys. Rev. Lett.

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Field-orthogonal temporal mode analysis of optical fields has recently been developed for a new framework of quantum information science. However, so far, the exact profiles of the temporal modes are not known, which makes it difficult to achieve mode selection and demultiplexing. 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 multidimensional quantum entanglement of continuous variables in telecom wavelength. The temporal mode characterization technique can be generalized to other pulse-excited systems to find their eigenmodes for multiplexing in the temporal domain.

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confidence: 99%

Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables

Huo

Liu

et al. 2020

Phys. Rev. Lett.

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“…The change of mode structure and functions with the gain means that we will need to measure them constantly at different gains as we change the operation condition. Fortunately, methods are recently developed for the direct measurement of mode functions and mode coefficients of parametric processes [11,30].…”

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confidence: 99%

Mode Structure of a Broadband High Gain Parametric Amplifier

Chen,

Zhang,

2021

Preprint

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High gain parametric amplifier with a single-pass pulsed pump is known to generate broadband twin photon fields that are entangled in amplitude and phase but have complicated spectral correlation. Fortunately, they can be decomposed into independent temporal modes. But the common treatment of parametric interaction Hamiltonian does not consider the issue of time ordering problem of interaction Hamiltonian and thus leads to incorrect conclusion that the mode structure and the temporal mode functions do not change as the gain increases. In this paper, we use an approach that is usually employed for treating nonlinear interferometers and avoids the time ordering issue. This allows us to derive an evolution equation in differential-integral form. Numerical solutions for high gain situation indicate a gain-dependent mode structure that has its mode distributions changed and mode functions broadened as the gain increases. This study will enable us to have a complete picture of the mode structure of parametric processes and produce high quality quantum sources for a variety of applications of quantum technology.

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Control and Measurement of Quantum Light Pulses for Quantum Information Science and Technology

et al. 2021

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Manipulation of quantum optical pulses, such as single photons or entangled photon pairs, enables numerous applications, from quantum communications and networking to enhanced sensing. Common methods to shape laser pulses based upon filtering or amplification cannot be employed with quantum light pulses as these approaches introduce detrimental loss and noise to the system. Here, methods to control and measure quantum light pulses based upon deterministic application of targeted phases in time and frequency domains are reviewed, along with recent demonstrations of quantum applications.

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Direct temporal mode measurement of photon pairs by stimulated emission

Cited by 6 publications

References 23 publications

Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables

Direct Temporal Mode Measurement for the Characterization of Temporally Multiplexed High Dimensional Quantum Entanglement in Continuous Variables

Mode Structure of a Broadband High Gain Parametric Amplifier

Control and Measurement of Quantum Light Pulses for Quantum Information Science and Technology

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