编码频谱可控的时域相位编/解码器  

Temporal phase en-decoder with controllable en-decoding spectrum

作　　者：朱英勋[1,2] 王荣[1] 丁晓光[2] 蒲涛[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]沈阳军区军训器材研究所,辽宁沈阳110035

出　　处：《解放军理工大学学报（自然科学版）》2009年第2期109-112,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60502003)

摘　　要：为了将光码分多址(OCDMA)系统的光源与编解码器频谱相匹配,根据等效相移原理提出并实现了一种编码频谱可控的基于超结构光纤光栅的光码分多址时域相位编/解码器。该编/解码器在制作过程中仅需一块均匀相位掩模板即可在不同的目标信道上实现编码,从而为OCDMA系统与WDM(wavelength-di-vision multiplexing)的结合提供了一个简单有效的方法。利用计算机仿真和实测数据对该编/解码器性能进行了验证。结果表明:与传统的等效相移编解码器相比,该编解码器具有更大的最佳自互相关峰值旁瓣比(P/W和P/C);在窄脉冲入射的条件下,该编/解码器具有明显的性能优势;随着脉冲宽度的增加,该编解码器性能与传统的等效相移编解码器趋于一致。In order to match the optical source with the en/decoder in the Optical Code Division Multiple Access （OCDMA） system, a new SSFBG-based OCDMA temporal phase en-decoder was proposed and realized according to the equivalent-phase-shift theory. During fabrication, only one uniform phase mask board was needed to achieve en-decoding with different target channels. Computer simulations and measured data were implied to verify the performance of the en-decoder. Results show that compared with the traditional en-decoder, this en-decoder has larger optimal auto-and cross-correlation peak-wing-ratio （P/ W and P/C）, that under the condition of short pulse incidence, this en-decoder has a remarkable predominance, and that with the increase of the pulse width, the performance of the en-decoder will be identical with the traditional one.

关 键 词：光码分多址 编/解码器 超结构光纤布拉格光栅 

分 类 号：TN929.11[电子电信—通信与信息系统]