TwistedΒΆ

We again use the hollow core fiber of the parent section. Additionally, we twist the fiber along the propagation direction:

The parameter

keys.twist = 2*pi*10000

in run_project.m defines the Twist of the fiber, i.e., how the fiber is twisted around the origin going along the fiber direction. Here, we set a value of 10000 twists traversing 1m of the fiber or 10 twists per millimeter. When looking at the mode for phase 0^{\circ} and 180^{\circ} we clearly see twisting of the mode around the origin:

   
field1 field2