Video to Show DC-200/40-PZ-Yb Single Mode Nearfield

Output of the ytterbium doped DC-200/40-PZ-Yb fiber from NKT Photonics where the 1064 nm seed laser (~6 µm spot size) launch position is scanned across the input facet of the fiber. Only the fundamental mode (LP01) is present in the output beam. When the input launch position is changed the mode profile is maintained but with reduced power. This demonstrates the single mode property of the DC-200/40-PZ-Yb.

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