Abstract

A modeless broadband dye laser is applied to probe inside optically dense fireballs generated by high explosives using single-shot, high resolution absorption spectroscopy. Despite attenuation of the main beam by 98%, high signal-to-noise ratio absorption spectra of Al, Ti, and AlO are readily obtained at resolutions of 0.007 nm, and luminosity from the fireball is strongly rejected. Detection limits for atomic species are less than 200 ppb. The method offers good time resolution of chemistry within the fireball, and scaling laws suggest that this technique should be valid in explosives tests at least up to the gram scale.

Near-MHz temperature and H₂O measurements in post-detonation fireballs of 25 g hemispherical explosives using scanned-wavelength-modulation spectroscopy

Charles J. Schwartz, Joshua W. Stiborek, Austin Butler, Damon Chen, Daniel R. Guildenbecher, Marc Welliver, Nick Glumac, and Christopher S. Goldenstein
Appl. Opt. 62(6) 1598-1609 (2023)

Broadband coherent anti-Stokes Raman spectroscopy with a modeless dye laser

Jae Won Hahn, Chul Woung Park, and Seung Nam Park
Appl. Opt. 36(27) 6722-6728 (1997)

Broadband coherent anti-Stokes Raman scattering spectroscopy of nitrogen using a picosecond modeless dye laser

Sukesh Roy, Terrence R. Meyer, and James R. Gord
Opt. Lett. 30(23) 3222-3224 (2005)

High-resolution broadband N₂ coherent anti-Stokes Raman spectroscopy: comparison of measurements for conventional and modeless broadband dye lasers

Joel P. Kuehner, Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton
Appl. Opt. 42(33) 6757-6767 (2003)

Noise in single-shot broadband coherent anti-Stokes Raman spectroscopy that employs a modeless dye laser

D. R. Snelling, R. A. Sawchuk, and T. Parameswaran
Appl. Opt. 33(36) 8295-8301 (1994)