Fig. 1. Experiment setup.

Fig. 2. Structure of optical fiber connector. (a) Overall view. (b) Bottom view. (c) Sectional view. (d) Principle of operation for homemade connector.

Fig. 3. Long-exposure far-field pattern. (a) Measured in open loop. (b) Measured in close loop. (c) Simulated result.

Fig. 4. Normalized variation of energy in the pinhole in closed and open loops.

Fig. 5. (a) Frame of two adjoining spots. (b) Segmented spots and calculated centroids.

Fig. 6. Frequency histogram and fitting curve of relative tilt angles of (a) x1, (b) y1, (c) x2, and (d) y2.

Fig. 7. Scatter plot of beam spot 1 against beam spot 2 for (a) x-axis and (b) y-axis.

Fig. 8. (a) Normalized power of each channel. (b) Power measured of each channel.

Fig. 9. (a) Ideal far-field pattern. (b) Far-field pattern with N(0,2) distribution dynamic tilt errors. (c) Far-field pattern with N(0,2) distribution dynamic tilt errors and λ/22 piston phase errors. (d) Far-field pattern with dynamic tilt errors, phase errors, and power inconsistency. (e) Far-field pattern of experiment.