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Related Experiment Video

Updated: Jun 13, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

High-spatiotemporal-quality petawatt-class laser system.

Hiromitsu Kiriyama1, Michiaki Mori, Yoshiki Nakai

  • 1Advanced Photon Research Center , Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa-city, Kyoto, 619-0215, Japan. kiriyama.hiromitsu@jaea.go.jp

Applied Optics
|April 15, 2010
PubMed
Summary

We developed a high-intensity laser system combining Ti:sapphire chirped-pulse amplification (CPA) and optical parametric CPA (OPCPA) to achieve over 30 J energy and 500 TW peak power, demonstrating superior temporal contrast.

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Area of Science:

  • High-intensity laser physics
  • Ultrafast optics
  • Nonlinear optics

Background:

  • Advancements in high-intensity laser systems are crucial for exploring fundamental physics and enabling new applications.
  • Combining chirped-pulse amplification (CPA) techniques like Ti:sapphire CPA and optical parametric CPA (OPCPA) offers a pathway to higher energies and peak powers.
  • Achieving high temporal contrast is essential for mitigating nonlinear effects and ensuring clean laser-matter interactions.

Purpose of the Study:

  • To develop a femtosecond high-intensity laser system integrating Ti:sapphire CPA and OPCPA.
  • To characterize the energy output, peak power capabilities, and temporal contrast of the developed laser system.
  • To investigate the effectiveness of beam homogenization techniques for high-energy pump lasers.

Main Methods:

  • Integration of Ti:sapphire chirped-pulse amplification (CPA) and optical parametric CPA (OPCPA) techniques.
  • Utilized a cleaned high-energy seeded OPCPA preamplifier as the front end.
  • Employed diffractive optical elements for beam homogenization of a 100 J Nd:glass green pump laser in a Ti:sapphire final amplifier.

Main Results:

  • Achieved broadband output energy exceeding 30 J, with potential for peak powers over 500 TW.
  • Demonstrated exceptional temporal contrast exceeding 10^10 on subnanosecond timescales and near 10^12 on nanosecond timescales.
  • Generated broadband high-energy output with a near-perfect top-hat-like intensity distribution using beam homogenization.

Conclusions:

  • The developed hybrid CPA-OPCPA laser system represents a significant advancement in high-intensity laser technology.
  • The system's high energy, high peak power, and superior temporal contrast open new avenues for scientific research.
  • Effective beam homogenization is critical for optimizing the performance of high-energy laser amplifiers.