Fiber Analysis & Design

Optical Communication System Design

Optical System  - Figure 4 - Same as in The straight lines represent the chirp

Effects of Group Velocity Dispersion (GVD) on Gaussian Pulse Propagation

To demonstrate the influence of the group (GVD) velocity dispersion on pulse propagation in optical fibers in “linear” regime. The basic effects related to GVD are: GVD induced pulse broadening GVD induced pulse chirping Pulse compression  The equation, which describes …

Optical System - Figure 3 - (a) Simulation results for input signals with azimuth = 0, ellipticity = 0

Effects of PMD on Pulse Propagation

Polarization mode dispersion (PMD) can cause serious problems in high bit-rate transmissions. In this lesson, the PMD emulator component is used to demonstrate the distortions in the transmitted signal, caused by first and second order PMD effects. The system showed …

Optical System - Figure 4 - Pulses and their spectrum after of propagation in a lossless fiber 50 km

Effects of Cross Phase Modulation (XPM) and Four-Wave Mixing (FWM)

The purpose of this lesson is to give an idea about the effects associated with cross-phase modulation (XPM) and four-wave mixing (FWM) accompanying the propagation of optical signals at different carrier frequencies in a nonlinear dispersive fiber [1]. At first, we …

Optical System -Figure 2 - Results with SPM

Combined Effects of GVD and SPM on Gaussian Pulse Propagation

This lesson demonstrates that the effects of SPM and anomalous GVD on the pulse propagation are counteracting. As already discussed, (see the “Group velocity dispersion” in the Tutorials), the effect of GVD on the pulse propagation depends on whether or not …

Optical System  - Figure 4 - Optical fiber component parameters

Combined Effects of GVD and SPM on Modulational Instability

This lesson demonstrates that the propagation of a CW beam inside an optical fiber is inherently unstable due to the interplay between the anomalous GVD and SPM. The layout and the parameters are shown in Figure 1.   Figure 1: Layout and …

Optical System - Figure 6 - DGD of a fiber (left) with histogram (right)

PMD-Induced Broadening of Ultra-Short Pulses

This lesson demonstrates the broadening of a “very short” (Dirac δ-shaped) pulse caused by polarization mode dispersion (PMD). It also shows that the probability distribution function of the differential group delays between the principal states of polarization generated by the …

Optical System - Figure 1 - FWM project layout

Validation of FWM Effect

This tutorial demonstrates the validity of the FWM algorithm, as well as providing the user with some useful designing tips for optimizing simulation time and accuracy. The layout in was used to obtain results, and can be found in the sample …

Optical System - Figure 1 - Layout and global parameters

Stimulated Raman Scattering

This lesson demonstrates the light amplification caused by the stimulated Raman scattering effect. The layout and its global parameters are shown in Figure 1.   Figure 1: Layout and global parameters  Figure 2 shows the setup for the optical fiber component.    Figure …

Optical System - Figure 3 - Output spectrum

Stimulated Raman Scattering—Separated Channels

The purpose of this lesson is to demonstrate light amplification resulting from the stimulated Raman scattering effect. The layout with its global parameters is shown in Figure 1   Figure 1: Layout and global parameters  The input spectrum (Figure 2) consists of a …

Initially unchirped Gaussian pulses

SPM-Induced Spectral Broadening

This lesson demonstrates the basic effects of self-phase modulation (SPM) on pulse propagation. These include: Pulse chirping Pulse spectral broadening  The effects SPM of are described by [1]:where E(z, t) is the electric field envelope, and the parameter y is …

OptiSystem Manuals

VFEM Accuracy and Advantages

January 20, 2017

As optical systems move towards an integrated platform, the modelling of high refractive index contrast, sub-wavelength dimension…

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