OptiSystem Applications

Optical Code-Division Multiple-Access System (OCDMA)

Optical System - Figure 1 OCDMA system

The system designed in project SAC OCDMA.osd (Figure 1) is a spectral-amplitude-coding OCDMA. It has three users, where in this setup two users are transmitting data, while one user is off. The FBGs in the system are working as enconders/decoders for the incoherent optical signal.

Free Space Optics (FSO)

Optical System - Figure 1 FSO Link

Free Space Optics (FSO) communications [1] refers to the transmission of modulated visible or infrared beams through the atmosphere to obtain optical communications. FSO.osd (Figure 1) demonstrates a typical free space optical link operating at 1.25 GB/s, where usually the main source of penalty is the atmospheric attenuation.

Coherent Optical Transmission

Coherent 4 QAM.osd (Figure 1) demonstrates a 10 Gbps 4-QAM coherent optical system transmission over 100 km of fiber using homodyne detection.

Radio Over Fiber (RoF)

Optical System - Figure 1 SCM ASK Link

Radio over Fiber SCM ASK.osd (Figure 1) demonstrates the use of a subcarrier multiplexing (SCM) architecture to transmit several analog channels and one digital amplitude-shift keying (ASK) signal in a bidirectional setup.

Optical Time Domain Multiplexing (OTDM) Design

Optical System - Figure 3 (a) Initial bit sequence

The objective of this lesson is to demonstrate the possibility of simulating a packet-interleaved operation using OptiSystem.
In this case, the data stream externally modulates a periodic stream of narrow pulses.
Because the bit interval is T, the separation between successive pulses is also T.

System Performance Analysis Using Script Automation

Optical System - Figure 1 System layout

The objective of this lesson is to demonstrate the performance analysis of a system using the script page to vary the system parameters and store the results.
Sometimes, to analyze the system performance, several parameters in the system are varied and the results for each different configuration have to be stored.

BER Calculation Using the BER Test Set

Optical System - Figure 1 System layout with BER estimated

This example demonstrates the use of a BER test set component to calculate the system performance. Samples: NRZ_BERestimation.osd NRZ_BERcalculation.osd Fig. 1 shows the system layout designed that will have its performance evaluated. For an initial estimation on the BER value, a BER analyzer is used to estimate the bit error rate based on a Gaussian…

Fundamental and Higher Order Solitons

Optical System - Figure 4 - Evolution of N=3 soliton over one soliton period

This lesson demonstrates that the exact balance between the effects of SPM and GVD leads to the formation of a fundamental soliton – a light pulse that propagates without changing its shape and spectrum, and shows some basic features of the higher-order solitons. Figure 1 shows the layout and its global parameters. Figure 1: System…

Interactions of Optical Solitons

Optical System - Period given by the inverse scattering theory

This lesson demonstrates the particle-like nature of the solitons through some basic features of their interactions. The fundamental optical soliton propagates (see “Self-phase modulation and group velocity dispersion” from the Tutorials) undistorted due to the exact balance between the nonlinear (SPM) and dispersive (GVD) effects. Thus the soliton propagates as a “particle” (i.e. maintains its…

Decay of Higher Order Solitons in the Presence of Third-Order Dispersion

Optical System - Figure 7 - Output pulse shape after 11.6 km (or 5 soliton periods) of propagation. Second order soliton has been split into its constituents by the effect of TOD [1]

This lesson demonstrates the effect of third-order dispersion on the fundamental and higher-order solitons. The layout that we use and its global parameters are shown in Figure 1. Figure 1: System layout with parameters The setups for the bit sequence generator and for the sech-pulse generators are displayed in Figure 2 and Figure 3. Figure…