Fig. 1. Schematic of spatial frequency of spatial periodic modulation controlled by phase carrier combined with spatial filter

Fig. 2. Theoretical curve of the intensity of spatial frequency -f₀ with the change of parameter A

Fig. 3. Experimental setup for controlling the spatial frequency of amplitude-type spatial periodic modulation

Fig. 4. (a) Intensity distribution of incident beam with amplitude-type spatial periodic modulation; (b) intensity distribution of target beam

Fig. 5. Distribution of the spatial frequency measured on the focal plane (a) without phase carrier, and with phase carrier for periods of (b) 2 pixel, (c) 4 pixel, and (d) 6 pixel; (e) first-order spatial frequency after phase carrier f₁ varieswith the periods of phase carrier

Fig. 6. Corresponding one-dimensional profile curves on the focal plane (a) without phase carrier, and with phase carrier for periods of (b) 2 pixel, (c) 4 pixel, and (d) 6 pixel; (e)-(h) corresponding simulated one-dimensional profile curves

Fig. 7. (a) Intensity distribution of output near-field beam without phase carrier and (b) corresponding one-dimensional average PSD curve; (c) intensity distribution of output near-field beam after phase carrier with a period of 2 pixeland (d) corresponding one-dimensional average PSD curve