研究目的
Investigating the effects of thermal noise on the performance of long-haul DWDM optical networks using different photodetector structures (Si and InGaAs APDs, and PIN photodetectors) under various conditions.
研究成果
The study concludes that APD structures (Si and InGaAs) outperform PIN photodetectors in long-haul DWDM networks under thermal noise effects, especially up to 350 km. The system's optimal performance is achieved at an input power of 10dBm for a 50 km amplifying section. However, performance degrades rapidly beyond this point due to nonlinearities. The worst performance is observed at 10–18 W/Hz thermal noise levels.
研究不足
The study is limited to simulation results and does not account for all real-world variables. The performance is evaluated under specific conditions and may vary with different network configurations or environmental factors.
1：Experimental Design and Method Selection:
The study involves simulating long-haul 16-channel DWDM networks using Optisystem software to compare the performance of PIN and APD photodetectors under thermal noise effects.
2：Sample Selection and Data Sources:
The simulation focuses on the first channel (
3：1 THz) of a 16-channel DWDM network, analyzing its performance under different thermal noise levels, input powers, and fiber lengths. List of Experimental Equipment and Materials:
1 The simulation setup includes DWDM transmitters, multiplexers, single-mode fibers (SMF), EDFA amplifiers, photodetectors (PIN and APD), and BER analyzers.
4：Experimental Procedures and Operational Workflow:
The performance is evaluated by varying input power from ?5dBm to 20dBm, fiber lengths up to 500 km, and thermal noise levels from 10–18 W/Hz to 10–26 W/Hz.
5：Data Analysis Methods:
The analysis is based on SNR, Q-factor, and BER metrics derived from eye diagrams and BER analyzers.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Optisystem
Simulation software for optical communication systems
-
EDFA amplifier
Optical amplifier to compensate power loss in the fiber
-
PIN photodetector
Converts optical signals to electrical signals
-
APD (Si)
Converts optical signals to electrical signals with internal avalanche gain
-
APD (InGaAs)
Converts optical signals to electrical signals with internal avalanche gain
-
BER analyzer
Analyzes the bit error rate of the received signal
-
Low-pass Bessel filter
Filters out high-frequency noise from the electrical signal
-
3R regenerator
Regenerates the electrical signal by re-amplification, re-shaping, and re-timing
-
Electrical carrier analyzer
Measures the signal-to-noise ratio (SNR) of the electrical signal
-
登录查看剩余7件设备及参数对照表
查看全部
