研究目的
To present a robust holography method via second-order interference that can record both amplitude and phase information of the light field, considering both single-photon states and coherent states, and to verify its robustness against phase noise.
研究成果
The second-order holography method via HOM interference is robust against phase noise from the environment, allowing for the reconstruction of temporal wave functions of weak coherent states without complex algorithms or phase-lock technologies. This method is applicable in various degrees of freedom and has potential applications in quantum state tomography and holography-related fields.
研究不足
The method requires identical photons for perfect interference and is sensitive to distinguishing features between photons. Experimental imperfections can reduce the visibility of interference fringes.
1：Experimental Design and Method Selection:
The experiment utilizes a HOM (Hong-Ou-Mandel) interference setup to demonstrate second-order holography with coherent states in the temporal domain. The setup includes a continuous-wave laser divided into reference and test arms, with the test state prepared by phase and intensity modulators.
2：Sample Selection and Data Sources:
Weak coherent states are used, prepared by modulating a continuous-wave laser's phase and intensity.
3：List of Experimental Equipment and Materials:
Includes a continuous-wave laser (Toptica CTL-027027), phase modulators, intensity modulators, single-mode polarization maintaining fibers, single-photon detectors (SPD), and beam splitters.
4：Experimental Procedures and Operational Workflow:
The test state is modulated and interfered with the reference state at a beam splitter. Coincidence counts between two single-photon detectors are recorded to obtain the coincidence pattern.
5：Data Analysis Methods:
The normalized coincidence pattern is analyzed to retrieve the amplitude and phase distribution of the test state.
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