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Träfflista för sökning "WFRF:(Baev Valery) "

Search: WFRF:(Baev Valery)

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1.
  • Fomin, Alexey, et al. (author)
  • Fiber Laser Intracavity Spectroscopy of hot water for temperature and concentration measurements
  • 2015
  • In: Applied Physics B. - : Springer Science and Business Media LLC. - 0946-2171 .- 1432-0649. ; 121:3, s. 345-351
  • Journal article (peer-reviewed)abstract
    • The feasibility of temperature and concentration measurements using near-IR (similar to 1.5 mu m) water spectra obtained by fiber laser intracavity spectroscopy was evaluated. The spectra were registered with water vapor heated in a tubular oven at temperatures between 1000 and 1300 K and in adiabatic flames where temperatures were above 1800 K. Adiabatic flames of methane were stabilized on the heat flux burner. For temperature and concentration evaluation, the observed spectra were fitted by simulated spectra calculated utilizing the HITEMP database. Several discrepancies between HITEMP data and the experiments leading to significant errors in evaluation were found. After small corrections to the database better, accuracy of the temperature (+/- 70 K) and concentration (+/- 20 %) measurements is obtained. A more precise spectroscopic assignment is needed to improve the accuracy of the results.
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2.
  • Hartke, René, et al. (author)
  • Experimental study of the output dynamics of intracavity frequency doubled optically pumped semiconductor disk lasers
  • 2008
  • In: Applied Physics Letters. - : American Institute of Physics. - 0003-6951 .- 1077-3118. ; 92:10
  • Journal article (peer-reviewed)abstract
    • The dynamic behavior of the continuous wave output of an intracavity frequency doubled optically pumped semiconductor disk laser is described. These lasers typically exhibit stable emission. The reasons are found to be the tendency to single-mode operation and the high gain coupling of different modes due to an extremely short gain medium and the resonant periodic gain structure. A dependence of the fluctuation amplitude on gain decoupling of different fundamental modes is demonstrated. With the presented laser setup, more than 80% of conversion efficiency with respect to the available fundamental power has been achieved.
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