In this paper we try to use the single and multi-wall carbon nano-tube powders (fabricated in chemistry department of Shiraz University and outdoor sources) in order to fabricate a suitable thin films of them on the glass substraits and after this, their drying process is employed. If this semiconductor carbon nano-tubes are indivsually coated on the glass substrate they have an ability to locked the longtitudenal modes of a pulses NdLYAG laser and generate ultra-short pulses. The experimental results obtain in this paper for the shape of the output pulses in the present of this samples show that the obtaining of these short pulses is mostly possible by this method.

Keywords: Ultra-short pulse, spray coating, mode-locking, carbon nano-tube

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