optisystem用户手册.pdf

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Table of contents

Introduction

Tutorials

Advanced simulation project sections

IMPORTANT

Notes

Notes:

Lesson 1: Transmitter — External modulated laser

Main parts of the GUI

Project layout

Dockers

Status Bar

Menu bar

Auto connect feature

Visualizing the results

Visualizers and data monitors

Component parameters

Display parameters in the layout

Parameter units

Info-Window

Zoom, Pan, and Trace tools

Lesson 2: Subsystems — Hierarchical simulation

Subsystem properties — name and icon

Component Library

Lesson 3: Optical Systems — WDM Design

Global parameters

Transmitters

Parameter groups

Fiber + EDFA spans

BER Analyzer

Notes:

Lesson 4: Parameter Sweeps — BER x Input power

Optical transmitters

Notes:

Lightwave system components

Optical transmitters

Communication channel

Optical receivers

Receiver design

LED modulation response

References

Semiconductor laser modulation response

References

Semiconductor laser—Large signal modulation

References:

Chirp in Mach-Zehnder Lithium Niobate modulators

References:

LED spectral distribution

References

Semiconductor laser L-I curve

Laser noise and linewidth

Notes:

Optical fibers

Notes:

PMD-induced broadening of ultra-short pulses

References:

Stimulated Raman scattering

References

SPM-induced spectral broadening

References:

Optical receivers

Notes:

Modulation formats

Notes:

Optical receivers

Receiver design

Notes:

Receiver noise—PIN

Receiver noise—Shot noise enhancement with APD

Notes:

Receiver sensitivity—Bit error rate (BER)

Receiver sensitivity—Minimum input power

Notes:

Sensitivity degradation—Extinction ratio

Optical amplifiers—EDFA

Notes:

Power transients in EDFAs

References:

Excited state absorption impact on EDFA performance

References:

Analysis of gain and noise in Erbium doped fiber

Reference:

Inhomogeneous broadening in EDFAs

References

Notes:

Ion-ion interaction effects

Homogeneous Upconversion

Pair-Induced Quenching

References:

Rayleigh backscattering in EDFA

References:

Temperature dependence in EDFA

References:

Design Versions — EDFA Characterization

SPO optimization—System margin

SPO optimization—EDFA fiber length

Notes:

EDFA — Basic concepts

Layout Gain Spectrum

Layout Gain Saturation

Layout Amplifier Noise

Notes:

Booster Amplifier

Notes:

Inline Amplifier

Notes:

Preamplifier

Pumping requirements

Raman amplifiers

Notes:

100 nm bandwidth flatgain Raman amplifier— Average power model

References:

Raman Amplifier - Dynamic Model

Reference:

Notes:

Hybrid

Design of a broadband Raman amplifier using subsystems

Definition of Multi-line source

Defining of Multi-line source subsystem

Designing a broadband gain-flattened Raman amplifier

Using the interactive 3D graphics

SOA amplifiers

Notes

SOA gain saturation—Gaussian pulses

References

SOA gain saturation—Comparison with experimental results

References

SOA gain saturation—Chirped and super Gaussian pulses

Saturation of amplification of chirped Gaussian pulse

Saturation of amplification of super Gaussian pulse

References

SOA Gaussian Pulse — Gain Recovery

SOA parameters

The partial gain recovery

The complete gain recovery (the quasi CW operation)

Appearance of gain-saturation induced self-phase modulation

References

SOA Pulse Compression

References

Notes

SOA as a Wavelength Converter (FWM)

References

SOA as a Wavelength Converter (XGM)

References

Notes

SOA In-line Amplifier

References

Waveguide amplifiers

Notes:

Improved gain gharacteristics in high- concentration Er3+/Yb3+ codoped glass waveguide amplifiers

References

Notes:

Dispersion management

Notes:

Dispersion compensation schemes—a system perspective

Pre-, post-, and symmetrical-compensation by using DCF

Dispersion compensation by using DCM

References:

Compensation of dispersion with ideal dispersion component

Compensation of dispersion with Fiber Bragg Grating component

Notes:

Uniform Fiber Bragg Grating as a filter

References

Compensation of dispersion with OptiGratings

References

Dispersion compensation using subsystems and scripting

Lightwave systems

Notes:

Optimizing the power and dispersion compensation for nonlinear RZ transmission

References:

Limitations on the bit rate

Optical sources with a small spectral width

Optical sources with a large spectral width

References

10 Gb/s single channel transmission in standard mode fibers (SMF)

References

40 Gb/s single channel transmission in standard mode fibers (SMF)

References:

Engineering the fiber nonlinearities and dispersion

Single channel system

Multi-channel system

References

System design — Power budget

Time Division Multiplexing (TDM)

Preamplifier system

Booster system

WDM systems

Notes:

WDM Components—Tunable filters

Fabry-Perot filters

Uniform FBG Filters

WDM components—AWG demultiplexer

Notes:

Broadcast star coupler

Optical cross-connects

Notes:

Time division multiplexing

Notes:

Solitons and soliton systems

Solitons

Soliton systems

Notes:

Fundamental and higher order solitons

Reference

Interactions of optical solitons

Reference:

Decay of higher order solitons in the presence of intrapulse Raman scattering

Reference:

Orthogonal Raman gain

References

Stability of solitons in birefringent optical fibers

References:

Influence of third-order dispersion on solitons

References

Average soliton regime

References

Metro systems

Notes:

Interchannel crosstalk in Metro networks

References:

Migrating to 10Gbps in Metro networks

No dispersion compensation

"Per span" dispersion compensation

"Lumped" dispersion compensation

References

Negative dispersion fiber for Metro networks

Modeling Directly Modulated Lasers

Transmission Characteristics of DMLs

Transmission at higher bit rates

32 Channel DWDM system simulation at 2.5 Gbps

References

Power level management in optical Metro networks

Design without amplification

Self-Phase Modulation

Cross-Phase Modulation

Four-Wave Mixing

Design with Lumped Amplification

Optical Amplifier

Unity Gain Design

Considering the Non-Ideal Characteristics of EDFAs

References:

WDM Ring—Wavelength independent subscriber equipment

References

OptiSystem Tutorials Optical Communication System Design Software Version 3.0 for Windows® 2000/XP

OptiSystem Tutorials Optical Communication System Design Software Copyright © 2003 Optiwave Corporation All rights reserved. All OptiSystem documents, including this one, and the information contained therein, is copyright material. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means whatsoever, including recording, photocopying, or faxing, without prior written approval of Optiwave Corporation. Disclaimer Optiwave Corporation makes no representation or warranty with respect to the adequacy of this documentation or the programs which it describes for any particular purpose or with respect to its adequacy to produce any particular result. In no event shall Optiwave Corporation, its employees, its contractors or the authors of this documentation, be liable for special, direct, indirect, or consequential damages, losses, costs, charges, claims, demands, or claim for lost profits, fees, or expenses of any nature or kind. 10/1/03

Table of contents Introduction ..................................................................................................................... 1 Lesson 1: Transmitter — External modulated laser .................................................... 7 Starting OptiSystem ...................................................................................................7 Main parts of the GUI ..............................................................................................................8 Using the Component Library ..................................................................................12 Auto connect feature ............................................................................................................14 Turning the Auto connect feature off and on............................................................14 Connecting components manually ...........................................................................15 Visualizing the results ..............................................................................................17 Connecting visualizers .............................................................................................18 Visualizers and data monitors .............................................................................................19 Connecting a monitor to a port.................................................................................20 Component parameters........................................................................................................21 Viewing and editing component properties ..............................................................21 Changing parameter modes: arithmetic expressions...............................................23 Accessing visualizer parameters..............................................................................25 Running the simulation.............................................................................................26 Saving the simulation results ...................................................................................28 Displaying results from a visualizer..........................................................................29 Accessing the Info-Window......................................................................................33 Zooming into a graph ...............................................................................................33 Panning a graph.......................................................................................................34

Tracing a graph ........................................................................................................34 Saving graphs ..........................................................................................................35 Lesson 2: Subsystems — Hierarchical simulation.................................................... 37 Loading a sample file ...............................................................................................37 Creating a subsystem ..............................................................................................38 Looking inside a subsystem .....................................................................................38 Creating a subsystem output port ............................................................................40 Connecting a component output port to a subsystem output port............................40 Changing the port position and location...................................................................41 Subsystem properties — name and icon............................................................................43 Changing a subsystem name...................................................................................43 Adding a subsystem icon .........................................................................................44 Adding global parameters to a subsystem ...............................................................45 Accessing global parameters ...................................................................................47 Component Library ...............................................................................................................50 Creating sub folders in the Custom Library..............................................................50 Adding a component to the library ...........................................................................52 Creating additional ports ..........................................................................................52 Adding a fork to the subsystem................................................................................53 Saving the modified subsystem ...............................................................................55 Running the External Modulated Transmitter simulation .........................................55 Lesson 3: Optical Systems — WDM Design............................................................... 57 Viewing the global parameters.................................................................................57 Accessing the Parameter groups table ....................................................................60 Testing the transmitter .............................................................................................62 Connecting the Loop Control ...................................................................................64 Setting the number of signal round trips ..................................................................65 Obtaining results after the demultiplexer..................................................................66 Adding a receiver .....................................................................................................68

BER Analyzer.........................................................................................................................70 Adding the BER Analyzer.........................................................................................70 Viewing the BER Analyzer graphs and results.........................................................71 Calculating BER patterns .........................................................................................72 Calculating the 3D BER graph .................................................................................73 Viewing the 3D graph...............................................................................................74 Lesson 4: Parameter Sweeps — BER x Input power................................................. 77 Opening the sample file ...........................................................................................77 Selecting the parameter to iterate using the Sweep mode ......................................78 Changing the number of sweep iterations................................................................79 Changing the values of sweep iterations .................................................................80 Running the simulation.............................................................................................81 Obtaining results using the Report Page .................................................................81 Browsing parameter sweep iterations ......................................................................83 Combining graphs from sweep iterations.................................................................84 Optical transmitters Lightwave system components...........................................................................................89 Receiver design.....................................................................................................................96 LED modulation response............................................................................................ 99 Semiconductor laser modulation response ............................................................. 103 Semiconductor laser—Large signal modulation ..................................................... 107 Chirp in Mach-Zehnder Lithium Niobate modulators .............................................. 113 LED spectral distribution ........................................................................................... 119 Semiconductor laser L-I curve................................................................................... 123 Laser noise and linewidth .......................................................................................... 125

Optical fibers PMD-induced broadening of ultra-short pulses....................................................... 129 Stimulated Raman scattering..................................................................................... 139 SPM-induced spectral broadening............................................................................ 145 Optical receivers Modulation formats..................................................................................................... 153 Optical receivers ......................................................................................................... 157 Receiver design........................................................................................................... 159 Receiver noise—PIN ................................................................................................... 163 Receiver noise—Shot noise enhancement with APD.............................................. 165 Receiver sensitivity—Bit error rate (BER) ................................................................ 169 Receiver sensitivity—Minimum input power............................................................ 171 Sensitivity degradation—Extinction ratio................................................................. 175 Optical amplifiers—EDFA Power transients in EDFAs ........................................................................................ 179 Excited state absorption impact on EDFA performance......................................... 187 Analysis of gain and noise in Erbium doped fiber................................................... 195 Inhomogeneous broadening in EDFAs..................................................................... 199 Ion-ion interaction effects .......................................................................................... 207 Rayleigh backscattering in EDFA.............................................................................. 213 Temperature dependence in EDFA ........................................................................... 219 Design Versions — EDFA Characterization ............................................................. 225

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