研究目的
Design an efficient SAC–OCDMA system based on coherent and incoherent optical sources to reduce capital expenditure.
研究成果
The CCIS design presents a reasonable and reliable solution for future optical communication systems by effectively combining LED and CW laser technologies. It offers a balance between performance and cost, supporting a moderate number of users with reduced capital expenditure compared to using CW lasers alone.
研究不足
The study acknowledges the physical differences between coherent and incoherent sources, making their combination challenging. The performance of the CCIS design is a trade-off between the benefits of both sources, not fully matching the high user support of CW lasers or the low cost of LEDs.
1:Experimental Design and Method Selection:
The study combines coherent (CW LASER) and incoherent (LED) optical sources to design an efficient SAC–OCDMA system. The FRS code is adopted for evaluation, built using Jordan matrices with direct algebraic procedures to minimize cross correlation (MCC).
2:Sample Selection and Data Sources:
The system's performance is evaluated through simulation and experimental testing, comparing LED, CW laser, and CCIS designs.
3:List of Experimental Equipment and Materials:
Equipment includes Laser source (Ando AQ4321A), LED source (Exfo FLS-2103BLC), multiband filter, Mach-Zehnder modulator, and optical spectrum analyzer (ANDO AQ6317B).
4:Experimental Procedures and Operational Workflow:
The system's implementation involves spectrum slicing of LED and CW laser sources, encoding with FRS code, modulation, transmission over fiber, and decoding with balanced photo-detectors.
5:Data Analysis Methods:
Performance metrics such as BER, number of supported users, and cost are analyzed to compare the different system designs.
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