OptiSystem初学者指南：光学通信系统设计

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"OptiSystem_Getting_Started - 光通信系统设计软件OptiSystem的入门指南，适用于Windows 2000/XP操作系统，由Optiwave Corporation在2003年出版。" OptiSystem是一款强大的光通信系统设计软件，专为那些希望进入光通信领域或希望深化对光网络理解的用户而设计。该软件提供了全面的工具和功能，让用户能够模拟、分析和优化复杂的光通信系统。OptiSystem 3.0 版本是为Windows 2000/XP操作系统设计的，可能包含当时最先进的技术特性。这份"Getting Started"指南是初学者了解和使用OptiSystem的基础教程。它通常会涵盖以下关键知识点： 1. **软件界面和工作流程**：指南将引导用户熟悉软件的界面布局，包括菜单、工具栏、工作区等，以及如何创建和管理项目。 2. **基本操作**：介绍如何导入和设置元件库中的光学组件，如光源、光纤、光接收机等，以及如何建立和调整光路。 3. **系统建模**：讲解如何构建和配置光通信系统模型，包括链路设计、信号传输和接收、损耗和增益计算等。 4. **仿真和分析**：介绍如何运行仿真，查看和解释仿真结果，包括信噪比(SNR)、误码率(BER)、光功率分布等关键性能指标。 5. **高级特性**：可能涵盖更复杂的功能，如非线性效应模拟、WDM（波分复用）系统设计、调制格式选择等。 6. **报告和导出**：解释如何自定义和生成专业报告，以及如何将数据和图表导出到其他应用程序进行进一步分析。 7. **技术支持和帮助**：指南中会提供关于获取技术支持的信息，包括如何联系Optiwave Corporation以获取帮助或解答疑问。虽然这份文档可能已过时，因为它是针对2003年的版本，但其核心概念和基础操作仍然适用于当前版本的OptiSystem。对于学习光通信系统设计的人来说，了解这些基础知识仍然是非常有价值的。同时，用户需要注意，随着技术的发展，新的版本可能会引入更多的先进功能和改进，因此建议同时参考最新的用户手册或在线帮助。

WHAT’S NEW IN OPTISYSTEM 3.0

Multiplexers

New WDM Mux and Demux ES components: demultiplexes a user-defined

number of WDM signal channels. The center frequencies of the internal filters are

equally spaced (ES), allowing for easy setup of WDM systems.

Optical Fibers

Improved Optical Fiber component: total field approach together with new effects

and new numerical engines:

• Raman scattering models—The most comprehensive vectorial Raman model

available in literature. Two different levels of approximation in the calculation of

the scalar and vector Raman scattering models.

• Polarization mode dispersion—The most advanced solver available in literature:

The "course-step method" with variable scattering section lengths, and Gaussian

distribution of the fiber trunk lengths.

• Self-steepening effect

• Iterative procedure for calculation of nonlinear propagator with enhanced

accuracy: two forms of implementation of the nonlinear propagator—

"exponential" and "Runge-Kutta 4th (2th) order". The second enables vectorial

stimulated Raman scattering calculations. You can define frequency (the

dispersion effects are specified in terms of the frequency derivatives of the wave

vector) or wavelength (the dispersion effects are specified in terms of GVD and

slope parameters) domain of presentation of the dispersion effects. This feature

is very important in the analysis of soliton effects.

• Dispersion fitting according to the Sellmeier formula, which allows the correct

usage of the user's supplied (even noisy) data for either the dispersion or the

group delay.

Linear Multimode Fiber: new cutback factor to take into account the mode

coupling, mixing, and concatenation effects.

Optical Amplifiers

New Erbium Ytterbium co doped waveguide amplifier: allows for the design and

simulation of waveguide amplifiers with arbitrary spatial refractive index and doping

profiles:

• Allows for the calculation of the gain and noise characteristics of the high-

concentration Er3+/Yb3+ co-doped glass waveguide amplifiers

• Considers pump excited-state absorption

• Considers multimode operation for the pump and signals

• Homogeneous upconversion (HUC) from 4I13/2 e 4I11/2 levels

• Pair-induced quenching—PIQ

• Nine energy levels considering double-clad fiber design

• Spectral and longitudinal 3D graphs with forward and backward ASE, signals, and

pump power

• Internal mode solver

WHAT’S NEW IN OPTISYSTEM 3.0

Erbium doped fiber and amplifier component: OptiAmplifier algorithms were

improved and redesigned—the new effects and calculation engines are included in

OptiSystem:

• Qualitative analyses of inhomogeneous broadening, with possibility to generate

homogeneous cross-sections

• Excited-state absorption impact on the EDFA performance

• Ion-ion interaction effects, including Homogeneous Upconversion (HUC), Pair-

induced quenching (PIQ) and HUC and PIQ combined

• Rayleigh backscattering and double Rayleigh scattering

• Temperature dependence of the gain

• Includes 5 different possibilities to calculate the integral overlapping

• Includes the power dependence in the integral overlapping calculation

• Potential to load cross-sections and Giles parameters

• Potential to use different models to represent an EDFA: Saleh model, Jopson

model, and Giles model

• Wavelength dependent losses and backscattering effects

• Spectral and longitudinal 3D graphs with forward and backward ASE, signals and

pump power

Erbium doped fiber dynamic components: internal routines were modified to

improve accuracy. In the Analytical model, the option to use the saturation parameter

is included.

Erbium Ytterbium doped fiber amplifier: OptiAmplifier algorithms were improved

and redesigned—the new effects and calculation engines are included in OptiSystem:

• Five-level model rate equations

• Homogeneous model for ion concentration dependence

• Wavelength dependent losses

• Analytical and numerical solver for wider range of pump wavelength

• Spectral and longitudinal 3D graphs with forward and backward ASE, signals, and

pump power

Static Raman fiber model: average power approach is 100 times faster than

classical methods. Includes Rayleigh scattering, temperature dependence, and

chromatic dispersion effects, and spectral and longitudinal 3D graphs with forward

and backward noise, signals, and pump power.

Dynamic Raman fiber model: allows the analysis of power transients in Raman

amplifiers. Works with counter-propagating, co-propagating, and bidirectional

pumping. Allows the transient analysis of cascades of Raman amplifiers.

WHAT’S NEW IN OPTISYSTEM 3.0

Electrical Amplifiers

Improved Limiting Amplifier: electrical limiting amplifier. The minimum and

maximum output signal values are user-defined parameters.

New AGC Amplifier component: an electrical amplifier with user defined noise

figure and automatic gain control (AGC).

Polarization Devices

New PMD Emulator component: allows deterministic simulation of the first and

second order PMD in fibers, including chromatic dispersion and attenuation effects.

Electrical Regenerators

Data Recovery component: recovers the binary data from the electrical signal. It

can be used in 3R generators for the data recovery stage. Additional parameters allow

for automatic recovery of time delay (clock), decision instant, and threshold.

New 3R Regenerator component: regenerates an electrical signal. It returns the

original electrical and binary signal, and it has automatic recovery of time delay

(clock), decision instant, and threshold.

Optical Signal Processing

New Convert To Parameterized component: converts sampled signals and noise

bins into parameterized signals. You select the type of signals to be converted.

New Convert To Noise Bins component: converts sampled signals and

parameterized signals into noise bins. You select the type of signals to be converted.

Binary Signal Processing

New Duobinary Pre-coder component: can be used to avoid recursive decoding

in the receiver when a duobinary modulation format is required.

Tools library

New Limiter component: can be used as a ring controller module. This component

controls the number of signals passing from the input to the output port.

New Initializer component: a select switch. The signal entering the first input port

will be send to the output a user-defined number of times.

New Electrical Ring component: allows you to build systems using ring structures

with electrical signals.

New Command Line Application component: can create a process with user-

defined command line parameters, and can be used to call any windows application.

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OptiSystem初学者指南：光学通信系统设计

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