Abstract
This article presents measurements which combine modelocking technique with intracavity spectroscopy. To test this approach, a sample (10−5 m ethanolic solution of 1,4-dihydroxyanthranquinone) was inserted in a modelocked Ar+ ion laser and probed by intracavity pulses of a synchronously pumped dye laser. The probing of the sample results in an amplification of the dye laser output. Maximum output was measured if the pulses of the dye laser temporally overlapped with those of the Ar+ ion laser inside the sample. Under this condition, the spectral laser intensity was shaped by the spectrum of stimulated fluorescence which originated from a molecular vibronic state populated by pump laser excitation.
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