Stable pulses of variable width from a mode-locked hybrid TEA-CO2 laser.
We report a new technique to increase the stability of mode-locked pulses from a TEA-CO(2) laser. It consists essentially in the mode locking of a hybrid laser. Moreover, with the low-pressure cw gain cell operating, the pulsewidth varies as alpha(-1.1), where alpha is the modulation parameter, in contrast to the alpha(-0.5) dependence without the cw gain module. This permits easy tuning of the pulse width between 1.8 and 10 nsec. A model is presented that agrees well with our experimental results.
Bernard
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Laboratoire de Recherches en Optique et Laser, Département de Physique, Faculté des Sciences et de Génie, Université Laval, Québec, GI K 7P4, Canada.
Bélanger
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