立足现有的商用接收机组件实现解码信号的判决恢复是光码分多址(OCDMA)系统往实用化发展的一个重要方向。具有高功率对比度(PCR)的编解码器有助于在窄带接收条件下形成具有较高信噪比(SNR)的判决电信号。实验中基于商用窄带接收机组件即10 G PIN+TIA和10 G时钟数据恢复(CDR)模块，利用自主设计制作的具有高功率对比度的光纤光栅(FBG)编解码器实现了双用户10 Gb/s 60 km无误码传输实验，并初步实现了三用户10 Gb/s背靠背无误码实验。实验中测试了不同用户数情况下背靠背和60 km传输时的误码率(BER)曲线，分析了引起功率代价的系统损伤原因和进一步改进系统性能的思路。

To recover the decoded signals based on the existing commercial receiver modules is an important practical developing direction of optical code division multiple access (OCDMA) systems. The en/decoders with high power-contrast-ratio (PCR) can help to form the electrical decision signals with high signal-noise-ratio (SNR) under the narrow-band receiver condition. Based on the commercial narrow-band receiver, i.e., 10 G PIN+TIA and 10 G clock data recorery (CDR), two-user 10 Gb/s 60 km error-free transmission experiment is implemented with the self-designed fiber-Bragg-grating (FBG)-based en/decoders with high PCR. The three-user 10 Gb/s back-to-back (BTB) error-free experiment is also achieved. In the experiment, different bit-error-rate (BER) curves are tested with different users and w/o transmission. Both the impairing factors which cause the power punishment and the approaches to improve sytem performance are analyzed.