High-efficiency narrow-bandwidth KTP optical parametric oscillator for kHz–MHz planar laser-induced fluorescence

Webb, Austin M.; Crabtree, Christopher Q.; Athmanathan, Venkat; Meyer, Terrence R.; Kearney, Sean P.; Slipchenko, Mikhail N.

doi:10.1364/OL.510334

Title: High-efficiency narrow-bandwidth KTP optical parametric oscillator for kHz–MHz planar laser-induced fluorescence

Journal Article · 06 March 2024 · Optics Letters

DOI: https://doi.org/10.1364/OL.510334 · OSTI ID:2319064

; Crabtree, Christopher Q.;

;

; Kearney, Sean P.;

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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Sponsoring Organization:: USDOE

Grant/Contract Number:: 2095505

OSTI ID:: 2319064

Journal Information:: Optics Letters, Journal Name: Optics Letters Vol. 49 Journal Issue: 6; ISSN 0146-9592

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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