Fig. 1: Phase-shift evolution that is caused by a pump power jump from 100 W to 200 W. | Light: Science & Applications

Fig. 1: Phase-shift evolution that is caused by a pump power jump from 100 W to 200 W.

From: Modal energy transfer by thermally induced refractive index gratings in Yb-doped fibers

Fig. 1

a The modal interference pattern (last 50 mm) immediately prior to the pump power jump (t = 0 µs). The white line indicates the position of the intensity maximum of the MIP that will be tracked. b The refractive index grating (last 50 mm) immediately prior to the pump power jump (t = 0 µs). The black line indicates the position of the maximum of the RIG that is aligned with the tracked MIP maximum. c The modal interference pattern (last 50 mm) after the pump power jump (t = 250 µs). The white line indicates the new position of the tracked MIP maximum. d The refractive index grating (last 50 mm) after the pump power jump (t = 250 µs). The black line indicates the new position of the tracked RIG maximum

Back to article page