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基于超结构光纤光栅的双边带编/解码器 被引量:4

Double Band En/Decoder Based on Super Structured Fiber Bragg Gratings
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摘要 分析了基于等效相移(EPS)技术的超结构光纤光栅(SSFBG)相位编/解码器的原理及特点,提出并实现了一种双边带编/解码器。该编/解码器在不改变光纤光栅长度的前提下,实现了+1级和+3级编解码谱的级联,并很好地继承了等效相移技术所具有的设计灵活、制作精度低和与波分复用(WDM)系统兼容能力强等诸多的优点。理论及实测数据仿真结果均表明,在光脉冲源匹配最佳的前提下,双边带编/解码器较传统等效相移编/解码器而言,使得基于该光纤光栅相位编/解码器的窄带相干光码分多址(OCDMA)系统的编解码性能提高了3 dB,通过对比分析得到其本质原因在于双边带编/解码器结构提高了其单位长度内携带的相位信息量。 Principle and characteristic of super-structured fiber Bragg grating (SSFBG) en/decoder based on equivalent phase shift (EPS) are analyzed, and double band en/decoder is proposed. The + 1^st and + 3^rd spectra are successfully linked by designing grating structure with unchanging grating length. The new en/decoder well inherits the advantage of traditional equivalent phase shift, such as flexible design, low manufacture precision and strong wavelength-division-multiplex (WDM) compatible ability. The theoretical and experimental data indicate that double band en/decoder meliorates the en/decoder performance of coherent optical code division multiplex access (OCDMA) system by 3 dB. The essence is the improvement of phase information in unit grating length.
出处 《中国激光》 EI CAS CSCD 北大核心 2009年第5期1124-1128,共5页 Chinese Journal of Lasers
基金 国家自然科学基金(60502003)资助课题
关键词 光通信 光码分多址 超结构光纤光栅 相位编/解码器 等效相移 optical communication optical code division multiplex access super-structured fiber Bragg grating phase en/decoder equivalent phase shift
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