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How To Setup A Bias Generator In Optisystem

The DC bias generator acts as a DC source. In this example we combine the output of a DC bias generator to the output of a sine generator to observe the effect of adding a DC component. We will also modify the properties of the generator to observe the effects that result from changing each…

Optical System Parameter Optimization

Learn how to setup, manage, and analyze optimizations using OptiSystem. We investigate single parameter, multi-parameter & gain flattening scenarios.   Download the full PDF guide.    

How To Setup A Noise Source Generator In Optisystem

The Noise Source Block acts as a source of thermal noise. In this example, we have a user defined bit sequence connected to an NRZ pulse generator which will represent the data signal. We will be combining a noise source with our data signal to show how noise affects it.  We will then observe the…

How To Set Up An NRZ Pulse Generator In OptiSystem

The NRZ Pulse Generator component allows users to create a sequence of non-return to zero pulses that are coded by a digital signal input. This video describes how to setup and modify the NRZ Pulse Generator in OptiSystem. 

FBG Fiber Loop Mirror Sensor Design Basics

Fiber loop mirror configurations have been used in several different applications. One important application is sensing. Inserting a Fiber Bragg Grating (FBG) in the fiber loop mirror allows exploiting the switching feature of the loop mirror to enable enhanced sensing and accessing capabilities.

Lightwave System Components

Optical System - Figure 1 Lightwave System Components

FOCS Introduction Lightwave System Components.osd details a generic block diagram of an optical communication system. An optical communication system consists of a: •transmitter •communication channel •receiver…

Optimizing Power and Dispersion Compensation for Nonlinear RZ Transmission

Optical System - Figure 2 Eye diagram for RZ modulation with optimum parameters

In this tutorial we show an example of a maximization procedure. We will optimize the launch power and DCF length to maximize the Q factor at the receiver. Upgrading an existing noise-limited fiber plant requires an increase in launched power, which in turn brings the fiber nonlinearities. It has been shown that nonlinear return to…

10 Gb/s Single Channel Transmission in Standard Mode Fibers (SMF)

Optical System - Figure 2 Comparison of RZ and NRZ transmission

The fundamental limitation to high-speed communication systems over the embedded standard single-mode fiber at 1.55 µm is the linear chromatic dispersion. Typical value of β2  = –20ps2 / km at 1.55 µm for SMF leads to D=16 ps/(nm.km). For bit rate B = 10 Gb/s, the slot duration is TB = 100 ps. If we…

40 Gb/s Single Channel Transmission in Standard Mode Fibers (SMF)

Optical System Figure 5 Transmission distance 500 km at 40 Gbs

The fundamental limitation to high- speed communication systems over the embedded standard single-mode fiber at 1.55 mm is the linear chromatic dispersion. Typical value of β2  = –20ps2/km at 1.55 µm for SMF leads to D=16 ps/(nm.km). For bit rate B = 40 Gb/s, the slot duration will be TB = 25 ps. If we…

Engineering the Fiber Nonlinearities and Dispersion

Optical System - Figure 1 Eye diagrams of the received signal for several received signal powers when system residual dispersion is a) 0, b) 800 psnm.

The purpose of this example is to investigate the fiber nonlinearity and dispersion related issues in a system.
As long as the optical power within an optical fiber is small, the fiber can be treated as linear medium. However, when the power level is high, we have to consider the impact of nonlinear effects.