Ultrahigh-frame-rate OH fluorescence imaging in turbulent flames using a burst-mode optical parametric oscillator
Optics letters, 2009•opg.optica.org
Burst-mode planar laser-induced fluorescence (PLIF) imaging of the OH radical is
demonstrated in laminar and turbulent hydrogen-air diffusion flames with pulse repetition
rates up to 50 kHz. Nearly 1 mJ/pulse at 313.526 nm is used to probe the OH P_2 (10)
rotational transition in the (0, 0) band of the AX system. The UV radiation is generated by a
high-speed-tunable, injection-seeded optical parametric oscillator pumped by a frequency-
doubled megahertz-rate burst-mode Nd: YAG laser. Preliminary kilohertz-rate wavelength …
demonstrated in laminar and turbulent hydrogen-air diffusion flames with pulse repetition
rates up to 50 kHz. Nearly 1 mJ/pulse at 313.526 nm is used to probe the OH P_2 (10)
rotational transition in the (0, 0) band of the AX system. The UV radiation is generated by a
high-speed-tunable, injection-seeded optical parametric oscillator pumped by a frequency-
doubled megahertz-rate burst-mode Nd: YAG laser. Preliminary kilohertz-rate wavelength …
Burst-mode planar laser-induced fluorescence (PLIF) imaging of the OH radical is demonstrated in laminar and turbulent hydrogen-air diffusion flames with pulse repetition rates up to 50 kHz. Nearly 1 mJ/pulse at 313.526 nm is used to probe the OH P_2(10) rotational transition in the (0,0) band of the A-X system. The UV radiation is generated by a high-speed-tunable, injection-seeded optical parametric oscillator pumped by a frequency-doubled megahertz-rate burst-mode Nd:YAG laser. Preliminary kilohertz-rate wavelength scanning of the temperature-broadened OH transition during PLIF imaging is also presented for the first time (to our knowledge), and possible strategies for spatiotemporally resolved planar OH spectroscopy are discussed.
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