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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Cross-polarized wave-generation-based single-shot fourth-order autocorrelator
Applied Optics
|July 15, 2021
Summary
A novel autocorrelator using cross-polarized wave generation (XPW) offers precise temporal contrast measurement for high-power laser pulses. This compact system achieves a 10^12 dynamic range with high efficiency and stability.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- Temporal contrast is crucial for high-power laser systems.
- Existing methods like self-diffraction have limitations in efficiency and setup complexity.
Purpose of the Study:
- To propose and demonstrate a single-shot fourth-order autocorrelator for temporal contrast measurement.
- To leverage cross-polarized wave generation (XPW) for improved performance.
Main Methods:
- Utilized cross-polarized wave generation (XPW) for autocorrelation.
- Employed a cylindrical lens for focusing the input laser beam.
- Incorporated a 6 mm beta-barium borate crystal for sum-frequency generation.
Main Results:
- Achieved a measurement dynamic range of 10^12 with a 6 mJ input laser pulse.
- Generated an XPW signal with 400 µJ energy and a 27.2 fs duration.
- Demonstrated higher energy conversion efficiency and reduced sensitivity to misalignment compared to self-diffraction.
Conclusions:
- The proposed XPW-based autocorrelator offers a compact and efficient solution for temporal contrast measurement.
- This technology can advance the characterization of high-power laser pulses.
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