A Reduction of Optical Interference Noise in Subcarrier Multiplexed System with Multiple Optical Carriers

　　　　　在多光源次載波多工系統，為增加多光源載波通道數，因此降低光干擾雜訊是一項重要工作。本文的方法是在每一載波通路的多模雷射極體上，利用一強準位的正弦波調變訊號加以驅動，而使電射光譜寬度變寬。實驗結果証明此方法在次載波多工系統，當每個載波光源的波長任意擺置時，可以有效的抑制光干擾雜訊至最小。
　　　　　To reduce optical interference noise is a very important work for more extending multiple optical carrier channels in subcarrier multiplexed system. The technique is with a strong sine wave modulated frequency to each subcarrier laser diodes and broaden optical spectral widths. The results prove that optical interference can be depressed to minor when optical spectra overlap. The method can provide more multiple carrier channels for SCM system when the optical source center wavelengths are randomly allocated.