Fig. 1. The principle of optical phased array

Fig. 2. Far-field mode of optical phased array in different phase differences

Fig. 3. The relationship between FWHM and phase difference with of different array spaces

Fig. 4. The influence of wavelength on the relationship between FWHM and Δψ in the condition of different array spaces

Fig. 5. The relationship between FWHM and Δψ in the condition of different array spaces and array numbers

Fig. 6. The relationship between array space and maximum steering range with different wavelengths

Fig. 7. The relationship between array space and emission efficiency with different wavelengths

Fig. 8. The relationship between array number and SLSR

Fig. 9. Experimental system of operating range measurement

Fig. 10. The results of range measurement based on beat frequency algorithm

Fig. 11. The principle of scanning field measurement

Fig. 12. Two-dimensional scanning field of OPA

Fig. 13. The measurement of divergence angle

Fig. 14. The measurement of divergence angle by collimator