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Picosecond pulse measurements using the active laser medium

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2 Author(s)
Bernardin, J.P. ; Div. of Eng., Brown Univ., Providence, RI, USA ; Lawandy, N.M.

A simple method for measuring the pulse lengths of synchronously pumped dye lasers which does not require the use of an external nonlinear medium, such as a doubling crystal or two-photon fluorescence cell, to autocorrelate the pulses is discussed. The technique involves feeding the laser pulses back into the dye jet, thus correlating the output pulses with the intracavity pulses to obtain pulse length signatures in the resulting time-averaged laser power. Experimental measurements were performed using a rhodamine 6G dye laser pumped by a mode-locked frequency-doubled Nd:YAG laser. The results agree well with numerical computations, and the method proves effective in determining lengths of picosecond laser pulses

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Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 3 )