  Weyl points are point degeneracies that occur in momentum space of periodic
materials, and are associated with a quantized topological charge. We
experimentally observe in a 3D micro-printed photonic crystal that a charge-2
Weyl point can be split into two charge-1 Weyl points as the protecting
symmetry of the original charge-2 Weyl point is broken. Moreover, we use a
theoretical analysis to confirm where the charge-1 Weyl points move within the
Brillouin zone as the strength of the symmetry breaking increases, and confirm
it in experiments using Fourier-transform infrared spectrometry. This
micro-scale observation and control of Weyl points is important for realizing
robust topological devices in the near-infrared.
