Research / 2022 / Article / Fig 5

Research Article

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

Figure 5

Measured results for the air-core fiber under static state and external interference. (a) Measured magnitude of Doppler shifts by multiple numbers of measurement. Measured relative phase differences matching the frequency shifts via HE81 in (b), HE71 in (c), and HE61 in (d). Regions I, III, and V are the cases where the air-core fiber remains static state, and region II is the case where the air-core fiber is stressed (in-plane bent), and region IV is the case where the air-core fiber is subjected to waggling (out-plane movement).