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Updated: Jun 12, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Pulse compressor grating-waveguide structure for high-power chirped pulse amplification at wavelengths around 2 µm.

Danish Bashir, Thomas Graf, Marwan Abdou Ahmed

    Optics Express
    |June 11, 2026
    PubMed
    Summary

    We developed a high-efficiency reflection grating for 2-micrometer pulse compressors in high-power laser systems. This grating achieves 97% diffraction efficiency, the highest reported for this application.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Materials Science

    Background:

    • High-power laser systems require efficient pulse compression for various applications.
    • Existing pulse compressor gratings often face limitations in efficiency and damage threshold at specific wavelengths.
    • Development of advanced optical components is crucial for enhancing laser system performance.

    Purpose of the Study:

    • To design and demonstrate a high-efficiency pulse compressor grating operating in reflection.
    • To achieve high diffraction efficiency at a wavelength of approximately 2 micrometers for high-power laser systems.
    • To evaluate the grating's performance, including spectral bandwidth, tolerance to fabrication variations, and laser-induced damage threshold.

    Main Methods:

    • Conceptual design of a reflection grating optimized for 2-micrometer wavelength.

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    Last Updated: Jun 12, 2026

    20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
    10:17

    20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

    Published on: July 12, 2017

    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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  • Theoretical analysis of diffraction efficiency (>99%) over a 42 nm spectral bandwidth centered at 2050 nm.
  • Comprehensive tolerance analysis for fabrication parameters (groove depth, duty cycle, sidewall angle) and refractive index variations.
  • Estimation of laser-induced damage threshold (>0.68 J/cm² for 500 fs pulses).
  • Experimental fabrication and characterization of the pulse compressor grating.

    • Main Results:

    • Theoretical diffraction efficiency exceeding 99% over a 42 nm bandwidth at 2050 nm.
    • High theoretical laser-induced damage threshold (>0.68 J/cm² for 500 fs pulses).
    • Experimental characterization confirmed a diffraction efficiency of 97% for the fabricated grating.
    • This 97% efficiency is the highest reported to date for a 2-micrometer pulse compressor grating.

    Conclusions:

    • The demonstrated reflection grating concept offers high efficiency for 2-micrometer pulse compression.
    • The grating exhibits excellent theoretical performance and a high laser-induced damage threshold, suitable for high-power laser systems.
    • The achieved experimental efficiency represents a significant advancement in grating technology for this wavelength range.