Development of a Tunable Megahertz Pulse-burst Alexandrite Laser System Conference Paper uri icon

abstract

  • A new frequency-tunable pulse-burst alexandrite laser operating in the megahertz range has been built at Princeton University to enable time-accurate LIF and Filtered Rayleigh diagnostics of rapidly changing fluid and combustion processes. Our long term objective has been to extend our high-speed laser imaging capability to the imaging of individual molecular species such as NO and OH in high-speed and unsteady flows. In this regard, our efforts have been guided by the experience gained with a megahertz rate Nd:YAG pulse-burst system built previously by Wu et al. [l]. The present Alexandrite system operates in the vicinity of 761-nm but, in the future, will be injection-tunable over a 10 nm range. Also at a later date, frequency upconversion crystals will be added to produce tunable UV light in the vicinity of 254-nm for use with atomic mercury vapor filters. To date, the power output per pulse has been limited, requiring design changes. © 2003 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

author list (cited authors)

  • Luff, J. D., Mansfield, D. K., Zaidi, S. H., Aschoff, H., Kuper, J. W., & Miles, R. B.
  • Luff, J., Aschoff, H., Schober, T., Mansfield, D., Zaidi, S., & Miles, R.

publication date

  • June 2003