Research / 2022 / Article / Fig 4

Research Article

Remote Measurement of the Angular Velocity Vector Based on Vectorial Doppler Effect Using Air-Core Optical Fiber

Figure 4

Measured results based on 6 distinct vectorial eigenmodes in the air-core fiber under different rotation states. (a, e) Measured magnitude of Doppler shifts, shown as square, round and rhombic points, respectively, and compared to the theoretical prediction, shown as dashed lines in different colors. Measured relative phase differences matching the frequency shifts via HE81 in (b), HE71 in (c), HE61 in (d), EH61 in (f), EH51 in (g), and EH41 in (h).