Fig. 1. Schematic configuration of mode-locked all-fiber laser based on CNT-PVA film.

Fig. 2. Polarization precessing VDS:　(a) Typical dissipative optical spectrum; (b) pulse trains measured by oscilloscope; (c) signal noise ratio at fundamental frequency where the inset shows radio-frequency spectrum over 3 GHz; (d) polarization evolution trace shown on Poincare sphere; (e) power of two orthogonal polarization states; (f) DOP and phase difference.

Fig. 3. Dynamic adjustment of polarization attractor under the pump power of 160 mW:　(a) Change of polarization by adjusting PC in one direction; (b) change of optical spectrum; (c) change of DOP.