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. 2013 Nov 6;3:3154. doi: 10.1038/srep03154

Figure 7. Pulse-to-pulse evolution of states of polarisation in the mode locked laser cavity.

Figure 7

(a) green and red points corresponds to eigenstates of anisotropic cavity, circle is a trajectory of SOP evolution; (b) round trip is equal to the beat length (blue circle) and a half of beat length (green circles); (c) round trip is equal to one third of beat length (green circles); (d) pulse power is slowly oscillating and round trip is equal to one third of beat length (green circles).