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

CJ Schwartz, JW Stiborek, A Butler, D Chen… - Applied Optics, 2023 - opg.optica.org
A laser absorption spectroscopy diagnostic integrated within a hardened optical probe was
used to measure temperature and water mole fraction at 500 kHz in post-detonation fireballs …

Quantum-cascade-laser-absorption-spectroscopy diagnostic for temperature, pressure, and NO X 2 Π 1/2 at 500 kHz in shock-heated air at elevated pressures

JJ Gilvey, MD Ruesch, KA Daniel, CR Downing… - Applied …, 2023 - opg.optica.org
The design, validation, and application of a quantum-cascade-laser-absorption-
spectroscopy diagnostic for measuring gas temperature, pressure, and nitric oxide (NO) in …

Broadband ultrafast-laser-absorption imaging in the ultraviolet for spatiotemporally resolved measurements of temperature and CN

V Radhakrishna, RJ Tancin, CS Goldenstein - Applied Physics Letters, 2022 - pubs.aip.org
This Letter describes the development and implementation of an ultraviolet and broadband
ultrafast-laser-absorption-imaging (UV-ULAI) diagnostic for one dimensional (1D) imaging of …

Sensitive and single-shot OH and temperature measurements by femtosecond cavity-enhanced absorption spectroscopy

N Liu, H Zhong, TY Chen, Y Lin, Z Wang, Y Ju - Optics Letters, 2022 - opg.optica.org
In many low-temperature plasmas (LTPs), the OH radical and temperature represent key
properties of plasma reactivity. However, OH and temperature measurements in weakly …

Broadband ultrafast-laser-absorption measurements of NO2 absorption cross-sections from 430 to 500 nm at high temperatures behind shock waves

RJ Tancin, V Radhakrishna, CS Goldenstein - Journal of Quantitative …, 2024 - Elsevier
This work presents broadband spectrally resolved measurements of the absorption cross-
section of NO 2 from approximately 430 to 500 or 580 nm, depending on temperature, with a …

Broadband ultrafast-laser-absorption spectroscopy for multi-hydrocarbon measurements near 3.3 µm in flames

Z Chang, RJ Tancin, V Radhakrishna, RP Lucht… - Applied Optics, 2023 - opg.optica.org
This paper presents the development and application of a broadband ultrafast-laser-
absorption-spectroscopy (ULAS) technique operating in the mid-infrared for simultaneous …

[HTML][HTML] 5–13.5 μm broadband tunable long-wave infrared femtosecond laser

Y Liu, J Qian, R Feng, W Li, Y Li, Y Peng, Y Leng - APL Photonics, 2024 - pubs.aip.org
We introduce a broadband tunable femtosecond laser source in the long-wave infrared
(LWIR) band, covering the range of 5–13.5 μm, based on the integration of optical …

Dual-zone temperature and multi-species measurements in solid-propellant flames via broadband mid-infrared laser absorption spectroscopy

V Radhakrishna, KE Uhlenhake, SF Son… - AIAA AVIATION 2023 …, 2023 - arc.aiaa.org
T he addition of aluminum to propellants improves the propellant combustion performance,
flame temperature and specific impulse. Aluminum is a commonly used metal additive, in …

Single-shot ultrafast-laser-absorption measurements of temperature, CO, NO, and H2O in HMX fireballs

V Radhakrishna, RJ Tancin, GC Mathews… - AIAA Scitech 2021 …, 2021 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2021-0722. vid This article describes the
development and initial application of a single-shot ultrafast-laser-absorption-spectroscopy …

Ultrafast-Laser-Absorption Imaging for 1D Measurements of Temperature and CN via the Ultraviolet B2Σ+X2Σ+ Bands

V Radhakrishna, RJ Tancin… - AIAA SCITECH 2022 …, 2022 - arc.aiaa.org
Understanding the spatiotemporal evolution of CN is important to both combustion,
propulsion, and planetary research. In combustion, CN plays an important role in several …