Point and planar ultraviolet excitation/detection of hydroxyl-radical laser-induced fluorescence through long optical fibers. Academic Article uri icon


  • We demonstrate an all-fiber-coupled, UV, laser-induced-fluorescence (LIF) detection system of the hydroxyl radical (OH) in flames. The nanosecond-pulsed excitation of the (1,0) band of the OH A(2)(+)-X(2) system at 283 nm is followed by fluorescence detection from the (0,0) and (1,1) bands around 310 nm. The excitation-laser beam is delivered through a 400 m core UV-grade optical fiber of up to 10 m in length, and the fluorescence signal collected is transmitted through a 1.5 mm core 3 m long fiber onto the remote detector. Single-laser-shot planar LIF (PLIF) imaging of OH in flames is also demonstrated using fiber-based excitation. The effects of delivering intense UV beams through long optical fibers are investigated, and the system improvements for an all-fiber-coupled OH-PLIF imaging system are discussed. Development of such fiber-based diagnostics and imaging systems constitutes a major step in transitioning laser diagnostic tools from research laboratories to reacting flow facilities of practical interest.

published proceedings

  • Opt Lett

author list (cited authors)

  • Kulatilaka, W. D., Hsu, P. S., Gord, J. R., & Roy, S.

citation count

  • 17

complete list of authors

  • Kulatilaka, Waruna D||Hsu, Paul S||Gord, James R||Roy, Sukesh

publication date

  • May 2011