OptiSystem Tutorials

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…

Comparison of RZ and NRZ Modulation Formats for 40 Gb/s Systems

Most installed fibers are standard single mode fibers (SMF) with high group velocity dispersion values ( ~ 16ps/nm/km ) at 1.55 µm. To achieve a good level of bit-error- rate (BER) as well as to enable larger repeater spacing and larger signal-to-noise ratio (SNR) in this type of fiber, it is very important to consider…

16 Channel WDM System Design

Optical System - Figure 1 Single channel system layout

This lesson demonstrates the basic features of a typical WDM optical communication system and shows the basic design steps with OptiSystem. In this lesson we will develop a simple, realistic WDM communication system. The performance of the system will be shown and compared with published results. The impact of various physical effects accompanying the light…

WDM Components – Tunable Filters

Optical System- Figure 1 - Fabry-Perot Filter

OptiSystem component library includes different types of components for WDM systems, the tunable optical filters include Fabry-Perot filters, Mach-Zehnder interferometers, and grating based filters. Fabry-Perot filters Fabry-Perot filter.osd shows the transmission of a Fabry-Perot filter used as a tunable optical filter (see Figure 1). The frequency spacing between two successive transmission peaks is know as…