The formation of stable bound soliton states can be theoretically explained by the two major mechanisms: a) pulse splitting occurs through the effect of soliton energy quantisation; b) each split soliton experiences the balanced attraction. Primarily they are caused by the phase modulation and the anomalous group velocity dispersion (GVD), and repulsive forces simultaneously, during propagation along the cavity. As the result, the front soliton will experience a negative frequency shift and therefore the decrease of its group velocity through the anomalous GVD of the cavity, weather the back soliton will experience an increase of the group velocity. A soliton pair uses the dissipative nonlinear dynamics of the active cavity in order to remain stable without the feedback stabilisation [1, 2]. Here, for the first time, we present soliton molecules generation in s a DWCNT mode-locked Thulium doped fibre laser.

© 2015 IEEE

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