【摘要】 利用频谱分割技术进行了光码分多址接入 (OCDMA)系统传输实验。该实验的编解码器利用可调谐法 珀腔的不同自由谱域来区分不同用户 ,分析、测量了多址干扰对系统性能的影响 ,对系统中的光源、信道和编解码器的特性进行了讨论。测试表明 ,该接入系统在速率为 15 5Mb s ,MAI值是接收用户光功率 30倍的情况下 ,传输 11km普通单模光纤后 ,误码率优于 10 - 9。该系统实现简单 ,成本低 ,是全光接入的可选方案。更多还原

【Abstract】 Optical code division multiplex access (OCDMA) transmission system experiment based on spectral splicing is demonstrated. Different users are distinguished by the different free spectral range (FSR) of the tunable Fabry Perot cavity of the encoder/decoders. The influence of the multiple access interference (MAI) on the system performance is analyzed. The performance of the transmitter, the optical channel and the encoder/decoder is discussed. The BER measurement is also realized. The test results show that the bit error rate is better than 10 -9 after transmission of 11 km simple mode fiber with the access rate of 155 Mb/s and the MAI value 30 times higher than received optical power. This system is a possible solution for the future all optical access system for its lower cost and simple structure.更多还原