Abstract

The electronic excitation of key combustion species or flow tagging of chemical species requires a narrowband tunable UV source. In this work, a potassium titanyl phosphate (KTP) burst-mode optical parametric oscillator (OPO) pumped by a 532 nm laser is developed to generate a spectrally narrow signal and an idler output with 1.48 ± 0.19 cm⁻¹ bandwidth without the need for injection seeding. The idler (1410–1550 nm range) is further mixed with 355 or 266 nm to generate 284 or 226 nm for OH or NO planar laser-induced fluorescence (PLIF), respectively, with up to 1.9% conversion efficiency from 1064 nm to the UV. MHz-rate burst profiles are reported, and OH and NO PLIF are demonstrated in a rotating detonation combustor at rates up to 200 kHz.

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Megahertz-rate OH planar laser-induced fluorescence imaging in a rotating detonation combustor

Paul S. Hsu, Mikhail N. Slipchenko, Naibo Jiang, Christopher A. Fugger, Austin M. Webb, Venkat Athmanathan, Terrence R. Meyer, and Sukesh Roy
Opt. Lett. 45(20) 5776-5779 (2020)

100 kHz krypton planar laser-induced fluorescence imaging

Stephen W. Grib, Paul S. Hsu, Naibo Jiang, Josef J. Felver, S. Alexander Schumaker, Campbell D. Carter, and Sukesh Roy
Opt. Lett. 45(14) 3832-3835 (2020)

High-speed CH planar laser-induced fluorescence imaging using a multimode-pumped optical parametric oscillator

Joseph D. Miller, Sascha R. Engel, Terrence R. Meyer, Thomas Seeger, and Alfred Leipertz
Opt. Lett. 36(19) 3927-3929 (2011)

Characterization of a CH planar laser-induced fluorescence imaging system using a kHz-rate multimode-pumped optical parametric oscillator

Joseph D. Miller, Sascha R. Engel, Johannes W. Tröger, Terrence R. Meyer, Thomas Seeger, and Alfred Leipertz
Appl. Opt. 51(14) 2589-2600 (2012)

10 kHz two-color OH PLIF thermometry using a single burst-mode OPO

Paul S. Hsu, Naibo Jiang, Josef J. Felver, Daniel K. Lauriola, Paul M. Danehy, and Sukesh Roy
Opt. Lett. 46(10) 2308-2311 (2021)