V.M. Petrov, S. Lichtenberg, J. Petter und T. Tschudi: Control of the optical transfer function by phase-shift keying of a holographic Bragg grating. Optics Communications, 225 Oktober 2003, 131-139V.M. Petrov, S. Lichtenberg, J. Petter, and T. Tschudi, "Control of the optical ...
The transfer function of the filter with h1[n] is H1(z)=110∑n=09z−n=0.11−z−101−z−1=0.1z10−1z9(z−1)=0.1∏k=19(z−ej2πk∕10)z9Because this filter has nine zeros on the unit circle, its phase is not continuous and it cannot be unwrapped. The impuls...
As mentioned at the beginning, because the phase information of the light field is converted into amplitude variations during propagation, one can recover the phase from the recorded amplitude distribution. However, low-frequency phase component causes less amplitude variations, which is difficult for d...
Figure 1d shows the reflection coefficient of the cavity as a function of the silicon slab’s refractive index n. The simulated structure provides uniform amplitude and a nonlinear phase shift, corresponding well with the expected behavior from the ideal model. To implement arbitrary spatial phase ...
For the second order low-pass case, the transfer function’s phase shift can be approximated by: (3) Figure 4 (left axis) evaluates this equation (using α = √2 = 1.414) from two decades below the center frequency to two decades above the center frequency. Here the center frequency is...
Variation of Phase Shift as Function of Tap Position You control tap positions, and therefore phase shift, by sending pulses to one of the two block inputs labeled Up and Down. Applying a pulse to the Up (or Down) input moves the tap position upward (or downward) when th...
In shift registers there is generally provided an intermediate storage function between stages to enable each stage to transfer its information prior to accepting the next incoming signal, i.e., to avoid a race condition. In accordance with this invention there is provided between each stage a ...
the phase shift multilayer film consists of at least one layer of light absorption function film and at least one layer of phase shift function film, and the light absorption function film has an extinction coefficient k which increases as the wavelength changes from 157 nm to 260 nm, and has...
For amplitude regeneration, a plateau in the amplitude transfer function of the loop mirror was used, similar to that described in Section 16.2.1. Sign in to download full-size image Figure 16.5. Experimental setup for RZ-DPSK regeneration (from [12]). FS: fiber stretcher; DL: delay line;...
Of course, the transfer matrix of the PA process has the form [𝐺𝑒−𝑖𝜃𝑝𝑔𝑒𝑖𝜃𝑝𝑔𝐺], (6) where 𝐺=cosh(𝜉) and 𝑔=sinh(𝜉) are the magnification of the PA progress, and they satisfy 𝐺2−𝑔2=1. 𝜃𝑝 is the phase shift in the PA ...