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Title: Femtosecond damage experiments and modeling of broadband mid-infrared dielectric diffraction gratings

Abstract

High peak and average power lasers with high wall-plug efficiency, like the Big Aperture Thulium (BAT) laser, have garnered tremendous attention in laser technology. To meet the requirements of the BAT laser, we have developed low-dispersion reflection multilayer dielectric (MLD) gratings suitable for compression of high-energy pulses for operations at 2 micron wavelength. We carried out 10000-on-1 damage tests to investigate the fluence damage thresholds of the designed MLD gratings and mirrors, which were found between 100-230 mJ/cm2. An ultrashort pulsed laser (FWHM = 53 fs, λ = 1.9 μm) operating at 500 Hz was used in the serpentine raster scans. The atomic force microscope images of the damage sites show blister formation of the underlying layers at lower fluences but ablation of the grating pillars at higher fluences. We simulated the dynamic electronic excitation in the MLD optics with a finite-difference in the time domain approach in 2D. The simulation results agree well with the LIDT measurements and the observed blister formation. This model is able to evaluate the absolute LIDT of MLD gratings.

Authors:
ORCiD logo; ORCiD logo; ; ; ; ; ; ; ORCiD logo;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); XUV Lasers, Inc., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1830450
Alternate Identifier(s):
OSTI ID: 1860777; OSTI ID: 1864481
Report Number(s):
LLNL-JRNL-824269
Journal ID: ISSN 1094-4087; OPEXFF
Grant/Contract Number:  
17-ERD-033; 21-ERD-016; AC52-07NA27344; SC0019900
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Name: Optics Express Journal Volume: 29 Journal Issue: 24; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; high peak; average power lasers; laser-induced damaged; low-dispersion reflectors

Citation Formats

Zhang, Simin, Tripepi, Michael, AlShafey, Abdallah, Talisa, Noah, Nguyen, Hoang T., Reagan, Brendan A., Sistrunk, Emily, Gibson, David J., Alessi, David A., and Chowdhury, Enam A. Femtosecond damage experiments and modeling of broadband mid-infrared dielectric diffraction gratings. United States: N. p., 2021. Web. doi:10.1364/OE.439895.
Zhang, Simin, Tripepi, Michael, AlShafey, Abdallah, Talisa, Noah, Nguyen, Hoang T., Reagan, Brendan A., Sistrunk, Emily, Gibson, David J., Alessi, David A., & Chowdhury, Enam A. Femtosecond damage experiments and modeling of broadband mid-infrared dielectric diffraction gratings. United States. https://doi.org/10.1364/OE.439895
Zhang, Simin, Tripepi, Michael, AlShafey, Abdallah, Talisa, Noah, Nguyen, Hoang T., Reagan, Brendan A., Sistrunk, Emily, Gibson, David J., Alessi, David A., and Chowdhury, Enam A. Tue . "Femtosecond damage experiments and modeling of broadband mid-infrared dielectric diffraction gratings". United States. https://doi.org/10.1364/OE.439895.
@article{osti_1830450,
title = {Femtosecond damage experiments and modeling of broadband mid-infrared dielectric diffraction gratings},
author = {Zhang, Simin and Tripepi, Michael and AlShafey, Abdallah and Talisa, Noah and Nguyen, Hoang T. and Reagan, Brendan A. and Sistrunk, Emily and Gibson, David J. and Alessi, David A. and Chowdhury, Enam A.},
abstractNote = {High peak and average power lasers with high wall-plug efficiency, like the Big Aperture Thulium (BAT) laser, have garnered tremendous attention in laser technology. To meet the requirements of the BAT laser, we have developed low-dispersion reflection multilayer dielectric (MLD) gratings suitable for compression of high-energy pulses for operations at 2 micron wavelength. We carried out 10000-on-1 damage tests to investigate the fluence damage thresholds of the designed MLD gratings and mirrors, which were found between 100-230 mJ/cm2. An ultrashort pulsed laser (FWHM = 53 fs, λ = 1.9 μm) operating at 500 Hz was used in the serpentine raster scans. The atomic force microscope images of the damage sites show blister formation of the underlying layers at lower fluences but ablation of the grating pillars at higher fluences. We simulated the dynamic electronic excitation in the MLD optics with a finite-difference in the time domain approach in 2D. The simulation results agree well with the LIDT measurements and the observed blister formation. This model is able to evaluate the absolute LIDT of MLD gratings.},
doi = {10.1364/OE.439895},
journal = {Optics Express},
number = 24,
volume = 29,
place = {United States},
year = {2021},
month = {11}
}

Journal Article:
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https://doi.org/10.1364/OE.439895

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