Research / 2022 / Article / Fig 1

Research Article

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

Figure 1

Concept and schematic of measuring the angular velocity vector using air-core fiber. Through the excitation of the vector eigenmode by the coupling of the vector mode, the air-core fiber robustly launches a vectorial polarization field, which has the vectorial characteristic featuring spatial polarization. By illuminating the object with normally incident probe light, they will reflect the Doppler polarization signal light with time-varying polarization. Then, the Doppler polarization signal is projected into two different directions of polarizing angle to determine the rate and orientation of its varying polarization. Two time-varying intensity signals corresponding to - and -polarized delay/advance for distinguishing the chirality of the Doppler polarization signal.