OptiSystem Applications

Wavelength Conversion in a Wideband SOA

Optical System - Figure 3 Wavelength converted signal at 1550 nm

The objective of this lesson is to demonstrate the wavelength conversion using the wideband SOA component. Based on the results from the lesson “Wideband SOA Characterization”, we have designed a wavelength converter using the cross-gain modulation method. The system designed is shown in Figure 1. Figure 1: Wavelength converter system layout In the simulation, the…

Improved Gain in High-Concentration Er3+/Yb3+ Waveguide Amplifiers

Optical System - Figure 7 Signal gain versus Ytterbium concentration (Pp=200mW, Ps=1μ W, L=3cm, NEr=2.0 1026 ions m3)

This lesson will prove that we can achieve high gain with a short device length if we use a high-concentration Er3+/Yb3+ codoped glass waveguide amplifier. In this example, we simulate a codoped waveguide amplifier and show that the efficient Yb3+ to Er3+ energy transfer is a useful mechanism to reduce performance degradation due to Er3+…

Dispersion Compensation Schemes – A System Perspective

In this section, we will show how dispersion compensation schemes affect the system performance. The pulse broadening effect of chromatic dispersion causes the signals in the adjacent bit periods to overlap. This is called intersymbol interference (ISI). Broadening is a function of distance as well as dispersion parameter D. The dispersion parameter is given in…

Compensation of Dispersion With Ideal Dispersion Component

Optical System - Figure 3 Gaussian pulse after 10 km propagation in SMF

This lesson demonstrates the possibility for dispersion compensation with the help of ideal dispersion component in OptiSystem. The project layout is shown in Figure 1. Figure 1: Project Layout for dispersion compensation with ideal dispersion component in OptiSystem The following shape was generated in the Optical Gaussian pulse generator with an initial 12.5 ps pulse…

Compensation of Dispersion with Fiber Bragg Grating Component

Optical System - Figure 1 Project Layout for dispersion compensation with Fiber Bragg grating component in OptiSystem

This lesson demonstrates the possibility for dispersion compensation with the help of fiber Bragg Grating created with the Fiber Grating component. This component allows design of apodized and chirped fiber gratings that are able to provide dispersion compensation in optical system. The physical idea behind this compensation is following: creating of an apodised linear chirped…

Uniform Fiber Bragg Grating as a Filter

Optical System - Figure 10 Transmitted spectrums of the Gaussian pulses, duty ratio 0.5 and 0.05, respectively2

This lesson demonstrates the application of the uniform fiber Bragg grating component in OptiSystem as a filter. This lesson has two project layouts. In the first one, a white light source is used. In the second one, a Gaussian pulse is used. The first project layout is shown in Figure 1 Figure 1: Project Layout…

Compensation of Dispersion with OptiGrating

Optical System - Figure 5 Grating Definition dialog box

This lesson demonstrates how OptiSystem can work with OptiGrating to design a proper dispersion compensation element in optical systems. The idea behind it is to use the additional possibilities provided by OptiGrating for design of fiber gratings. The physical idea behind this compensation is following: creating of a linear chirped grating allows us to create…

Dispersion Compensation Using Subsystems

Optical System - Figure 2 Signal evolution in a dispersion compensated link span

This lesson illustrates how to simulate a simple dispersion compensated link elaborating further the concepts of subsystem definition. Let us set up the following layout, which includes…

Maximum-Likelihood Sequence Estimation (MLSE) Equalizer

Optical System - Figure 1 OptiSystem component library

This project MLSE Application.osd demonstrates the application of the component ‘MLSE Equalizer’. The MLSE Equalizer component is available in the OptiSystem component library folder ‘Default/Receivers Library/Regenerators’ (Figure 1). Figure 1: OptiSystem component library The system layout is presented in Figure 2. A 10 GB/s BPSK signal is generated by the ‘BPSK Generator’ component. The signal…

DFE – Decision-Feedback Equalizer

Optical System - Figure 4 Error level during training

Project DFE Application.osd demonstrates the application of the component ‘Electronic Equalizer”. The Electronic Equalizer component is available in the OptiSystem component library folder ‘Default/Receivers Library/Regenerators’ (Figure 1). Figure 1: OptiSystem component library The system layout is presented in Figure 2. A 10 GB/s BPSK signal is generated by the ‘BPSK Generator’ component. The signal is…