Fourier Analysis of Slow and Fast Image Propagation through Single and Coupled Image Resonators

Figure 3

(a) Original image injected into the cavity. (b) Fourier-transformed input image. The full width at half maximum of the Fourier image is 𝛿𝑘=4.9 mm⁻¹. (c)–(e) Reflected images obtained using continuous wave input light for under (𝑅₁=0.7, 𝑅₂=0.5, Δ𝑘=13.0 mm⁻¹), critical (𝑅₁=0.5, 𝑅₂=0.5, Δ𝑘=9.0 mm⁻¹), and over coupling (𝑅₁=0.5, 𝑅₂=0.7, Δ𝑘=13.0 mm⁻¹) conditions, respectively. (f) and (g) Reflected output images from the coupled image resonator (𝑅₁=0.5, 𝑅₂=0.9, 𝑅₃=0.99, 𝐿₁=5 cm, 𝐿₂=10 cm, Δ𝑘=9.0 mm⁻¹, Δ𝜈=80.6MHz) using a continuous wave input beam and temporal pulses of 25 ns (𝛿𝜈=17.6 MHz), respectively.