Abstract
We carried out measurements of the spectral distribution of wideband dye laser generation intensity within the limits and in the vicinity of an absorption line with its simultaneous recording at the frequencies of the fundamental and second harmonics of laser radiation. In the laser cavity we placed optical cuvettes with active and absorbing media, as well as selecting and nonlinear-optical elements. We show that at double frequencies the contrast of the narrow-band hole in the multimode laser generation spectrum increases. The gain in the concentration sensitivity of measurements depends in this case on the value of the absorption coefficient being determined.
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Institute of Molecular and Atomic Physics, National Academy of Sciences of Belarus, 70, F. Skorina Ave., 220072, Minsk, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 65, No. 4, pp. 516–521, July–August, 1998.
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Burakov, V.S., Naumenkov, P.A. & Raikov, S.N. Recording of selective intracavity absorption at doubled frequencies of multimode laser radiation. J Appl Spectrosc 65, 535–540 (1998). https://doi.org/10.1007/BF02675644
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DOI: https://doi.org/10.1007/BF02675644