OptiSystem Applications

Optical Communication System Design

FTTH: OCDMA Network Layout

FTTH (Fiber To The Home)

A broadband access network offers various high-speed services to the end-user such as internet, multimedia, tele-medicine and distant learning…

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DWDM Layout

DWDM (Dense Wavelength Division Multiplexing)

Dense Wavelength Division Multiplexing (DWDM) is a technology that allows multiple information streams to be transmitted simultaneously over a single fiber…

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RF spectrum for the in-phase component

Coherent Optical OFDM

Orthogonal frequency division multiplexing (OFDM) is a multicarrier transmission technique where a data stream is carried with many lower-rate subcarrier tones…

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Constellation diagram (for polarization X)

100 Gbps DP-QPSK System with Digital Signal Processing

The combination of polarization-multiplexing and quadrature phase-shift-keying (PM-QPSK or DP-QPSK) is emerging as one the most promising solutions to reach bit rates of 100 Gbps and higher.

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Represents the Eye Diagram, BER, and Q-Factor for User 1.

OCDMA Network Design

Optical Code-Division Multiple-Access (OCDMA) system simulation is crucial for optical engineers designing networks that require high levels of privacy and security. This Application Note describes how OptiSystem simulates such a network.

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Analysis and Simulation on Spectral Phase-Encoded OCDMA System (subscription required)

This paper analyzes the temporal behavior of pseudo-random code and the effects on a spectral phase-encoded time-spreading OCDMA System. A spectral phase-encoded time-spreading optical code division multiple access system designed by Optiwave’s Optisystem was demonstrated.

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Design and simulation of a novel phase-encoded OCDMA system

The security of optical code division multi-access (OCDMA) system was analyzed, and the results indicate the hidden trouble of security. A scheme of multi-codes to be transmitted single-user information has been proposed, and single-user eavesdropping model has been simulated.

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OptiSystem C++ Component

OptiSystem’s Cpp Component, similar in operation to the MATLAB Component, allows users to create their own custom components. These are written in C++ and loaded into OptiSystem via dynamic link libraries (DLLs). The user has access to OptiSystem’s signal classes …

Matlab Binary Switch Videos

Matlab Binary Switch

Matlab Binary Switch

These video tutorials will explain the protocol for setting up the MATLAB component in OptiSystem, by demonstrating a simple binary switch.

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Optical System - Figure 1 - Transmitter components

Optical Transmitters

The role of the optical transmitter is to: convert the electrical signal into optical form, and launch the resulting optical signal into the optical fiber.  The optical transmitter consists of the following components: optical source electrical pulse generator optical modulator …

Optical System - Figure 2 - System performance with increased bit rate

LED Modulation Response

The frequency response of an LED is determined by the carrier dynamics (and therefore is limited by the carrier lifetime Tn) and the parasitic capacitance of the LED (described by the RC constant TRC[2]. If a small, constant forward bias is …

Optical System - Figure 1 - Project layout

Semiconductor Laser Modulation Response

When using a directly modulated laser for high-speed transmission systems, the modulation frequency can be no larger than the frequency of the relaxation oscillations. The relaxation oscillation depends on both carrier lifetime and photon lifetime. The approximate expression of this …

Optical System - Figure 2 - Initial electrical pulse

Semiconductor Laser—Large Signal Modulation

The large-signal characteristics are related to the digital on/off switching of the laser diode. First, we will demonstrate the delay time required to achieve the population inversion to produce the gain. Second, we will demonstrate the typical for the direct …

Optical System - Figure 1 -  Dual-drive system layout

Chirp in Mach-Zehnder Lithium Niobate Modulators

The objective of this lesson is to demonstrate the relation between the voltage applied to the modulator arms and the chirp in the output for MZ Lithium Niobate modulators. Chirp is a critical element in high bit rate lightwave systems because …

Optical System - Figure 3 - Spectral distribution—resolution from 1nm

LED Spectral Distribution

The spectral distribution of the optical source determines the performance of the optical system through the dispersion [1], [2]. The spectral distribution of the LED is determined by the spectrum of spontaneous emission, which typically has a Gaussian shape. In …

Optical System - Figure 2 -  L-I curve—Power vs bias

Semiconductor Laser L-I Curve

The Light – Current (L-I) curve characterizes the emission properties of a semiconductor laser as it shows the current that needs to be applied to obtain a certain amount of power. We will show a L-I curve of our laser rate …

Optical System - Figure 2 -  Laser Noise

Laser Noise and Linewidth

Laser Intensity Noise.osd (see Figure 1) shows the laser spectral in CW operation at several power levels.   Figure 1: Laser Intensity Noise  The laser exhibits fluctuations in its intensity, phase, and frequency, even when the laser is biased at a constant current …

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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