Abstract
For the purpose of improving the utilization efficiency of the gain bandwidth of active media and generating stable ultrashort light pulses, a passive-active mode locking technique has been applied to a cw Rhodamine 6G dye laser. A sufficient ability of this technique for the elimination of the multiple-pulse operation of the mode locking at a higher pumping level and a longer resonator length has been proved. Observed pulse-width by the SHG autocorrelation technique is 1.4 ps with assuming a sech 2 pulse profile.
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