High-Power Ultrashort Laser Systems

High-power ultrashort laser systems generate pulses of light with durations in the femtosecond to picosecond range at peak powers reaching petawatt (10^15 W) levels and beyond. Central to these systems is chirped pulse amplification, in which a seed pulse is temporally stretched, amplified in large-aperture gain media and then recompressed to near-single-cycle duration. Advances in gain materials, compressor optics and front-end contrast enhancement have progressively raised achievable peak powers while suppressing parasitic lasing and amplified spontaneous emission. These lasers underpin studies in high-field physics, generating secondary sources such as high-energy electrons, ions and X-rays, and enable exploration of extreme states of matter. Emerging efforts focus on scalability towards exawatt regimes, higher repetition rates for average power, and novel architectures—such as coherent beam combining and tiled amplifiers—to overcome crystal size and thermal management limits. The global drive spans fundamental science, inertial confinement fusion research and industrial applications requiring high-intensity, high-contrast pulses.

Research from Nature Portfolio

Seminal demonstrations of chirped pulse amplification decades ago laid the foundation for present high-power systems by showing how to stretch, amplify and recompress ultrashort pulses without damage to optical components. More recently, ultra-broadband compressor gratings with diffraction efficiencies exceeding 90 percent over a 750–1150 nm bandwidth have been realised. By engineering grating profiles with optimised ridge geometry, these components support near-single-cycle pulse compression for forthcoming 100-petawatt and exawatt lasers.

High-Power Ultrashort Laser Systems publication trend

The graph below shows the total number of articles in high-power ultrashort laser systems across all publications each year (not limited to Nature Index journals).

Technical terms

Chirped pulse amplification (CPA): Technique that temporally stretches a pulse before amplification and recompresses it to avoid optical damage and achieve high peak power.

Ultrashort pulse: Optical pulse whose duration lies in the femtosecond to picosecond range, enabling high peak intensities.

Diffraction grating: Periodic optical element used in stretchers and compressors to spatially disperse and recombine spectral components of a pulse.

Pulse contrast: Ratio between the peak intensity of the main pulse and the intensity of preceding or background light, critical for avoiding pre-plasma formation.

Optical parametric amplification (OPA): Nonlinear process in which a pump wave transfers energy to a signal wave via a nonlinear crystal, amplifying the signal without population inversion.

References

1. 400nm ultra-broadband gratings for near-single-cycle 100 Petawatt lasers. Nature Communications (2023).
2. Shot Noise Suppression in Single-Shot High-Dynamic-Range Diagnosis via Photon-Gain-Aided Correlation. Ultrafast Science (2025).
3. Coherently tiled Ti:sapphire laser amplification: a way to break the 10 petawatt limit on current ultraintense lasers. Advanced Photonics Nexus (2023).