Abstract
Short pulses fully adjustable between 2 and 20 nsec were obtained from a double cavity laser pumped dye laser using the same amplifying cell. The duration of the pulse (short cavity) is controlled using a lower threshold cavity with adjustable length. The spectrum of the laser emission was found to be larger in the secondary cavity of variable length. This effect is attributed to a wavelength shift during the dye laser emission due to a variation with time of the excited molecular population.
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