Optical Fiber Communication System Simulation
Abstract
This paper describes the development direction of optical fiber communications, described the characteristics of system simulation and development at home and abroad.
Keywords：Opticalfibercommunications,development,SystemSimulation 1 Outline
1.1 Optical Fiber Communication
In the \superhighway\concept was put forward after the optical fiber communication technology in increasing the capacity and extend the communication distance has made rapid development. Broadband fiber amplifier W-EDFA (Wide band Erbium-Doped Fiber Amplifier) and dense wavelength division multiplexing optical fiber communication technology development is the most eye-catching direction. Loss and dispersion in order to reduce the design of the dispersion shifted fiber DSF (Dispersion Shifted Fiber), in the 1525-1565nm band, the dispersion fell to -2 - +3 ps / (nm ? km) between; zero dispersion at 1540nm. DWDM systems to reduce four-wave mixing effect, but also designed a new type of non-zero dispersion fiber NZDF (Non-Zero Dispersion Fiber). At the same time, integrated opto-electronics technologies (OEIC) is the rapid development of vertical-cavity surface-emitting laser VCSEL (Vertical Ca-vity Surface Emitting Laser) and electro-optical receiver optoelectronic integration has been achieved. Around a variety of light (OTDM) At present, there are active in research units. 1.2 System Simulation
System simulation is developed in the last two decades a science and emerging technologies. Is the so-called computer simulation model on the computer system for experimental study of the actual process. The use of computer simulation can be repeated simulation of the same phenomenon of the objective world and thus to find out the inherent laws. In particular, contain random variables and random process, it is
difficult to establish a mathematical model of an objective study of things, the computer simulation method has obvious advantages, has become the analysis, research and design of an important means of various systems. The application of computer simulation technology to the field of communications is one of an important branch. With the development of communication technologies, communications networks, the number and complexity of the rapid growth of the design of communication systems in use of computer simulation technology has become a new system designed to shorten the design cycle and improve design reliability and improved system performance has been an indispensable tool.
2 Optical fiber communication system simulation
Optical fiber communication technology is more than one cross-discipline integrated technology penetration. It involves the basic theory of communication (such as digital communication technology), and microwave technologies (such as fiber channel analysis of electromagnetic fields), as well as circuit design and microelectronic technology (such as application specific integrated circuit ASIC) and so on. Therefore, whether it is systematic planning and design, or a new type of transmission system and the system of exploration and research, have experienced lengthy complicated calculations. In addition, in order to verify whether the performance requirements of Section need to research and experiment repeated testing. If every time the direct use of the real system experiments, not only the cost of expensive, labor-and time-consuming and sometimes difficult to find the crux of the problem, therefore, address these problems is an effective means of computer simulation techniques, namely through the establishment of device components and the system model , and model experiments on the computer, using high-speed computer processing capacity, completion of the fiber-optic communications equipment and systems analysis, design optimization and performance testing and evaluation.
2.1 Optical fiber communication system simulation software, the status quo
The simulation is divided into circuit simulation and system-level simulation. Circuit-level simulation by resistors, capacitors, inductors and other components of the circuit model equivalent to the outer characteristics of Analog Devices. System-level simulation is Rong transfer function or the number of formula characteristics of analog simulation. Abroad, some optical fiber communication system simulation software for circuit analysis, focusing on different, such as the Boss is a user-friendly optical link simulation software, which includes fiber-optic device model, but only in a single wavelength system. SCOPE (Super Co-mpact Optoelectronic Simulation) is a kind of the photovoltaic devices and optical devices using the two-port network model to simulate the nonlinear microwave simulation software, its main use is in the microwave frequency of IM / DD Optical Communication Systems simulation. DEX SOLUS (Simulation of Light Using Spice) is based on the Spice circuit simulation software dedicated to the field of optical communication signal analysis software, it uses the equivalent circuit model to simulate optoelectronic devices, optical power of the models used in the simulation of voltage to represent . There are other circuit-level simulation software such as iSMILE and MISIM. IBM's OLAP (Optical Link Analysis Program) is a low-level to SYSTID and simulation software of optical devices integrated with software applications. There are a number of new simulation software, such as iFROST (illinois FibeR-optic and Optoelectronic Systems Toolkit), etc., the user can call other simulation software to provide a mixed-level simulation environment.
3 Conclusion
At present, China's optical fiber communication system simulation study has been started, to design a highly functional and reliable performance of the optical fiber communication system simulation package, to adapt to the rapid development of optical fiber communications have important theoretical and practical significance, has a high cost-effective and broad application prospects.