OptiSystem Applications

SOA as a Wavelength Converter (FWM)

Optical System - Figure 1 Two multiplexed CW signals

This lesson demonstrates the application of traveling wave SOA as a wavelength converter using the four-wave mixing effect. Four-wave mixing (FWM) is a nonlinear effect that takes place when two waves (signal and pump) at different wavelengths are injected into an SOA. A third optical field is generated at the device output, with frequency Wc…

SOA as a Wavelength Converter (XGM)

Optical System - Figure 10 Shape and spectrum of the signal at  = 1540 nm

This lesson demonstrates the application of traveling wave SOA as a wavelength converter using cross-gain saturation effect. The principle use of the cross-gain modulation in SOA is as an intensity-modulated input signal that modulates the gain in the SOA via gain saturation effect. A continuous wave signal at the selected output wavelength is modulated by…

SOA In-Line Amplifier

Optical System - Figure-9-SOA-pulse-patterns

One possible way to upgrade an existing network from previously installed standard optical fibers is to exploit the 1.3 mm optical window, where the step index fibers have a zero-dispersion wavelength using SOA. The advantages of using SOA as in-line single-channel optical amplifiers are: low dispersion of the SMF at this carrier wavelength attractive features…

Wideband SOA Characterization

Optical System - Figure 4 Noise spectra for different input signal powers

The objective of this lesson is to characterize a semiconductor optical amplifier (SOA) through simulations. Initially, we are going to characterize the SOA response to the variation in the input signal power. Figure 1 shows the system layout used in the simulation. We put the power parameter in the CW laser in sweep mode and…

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

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…