摘要
介绍了光码分多址(OCDMA)系统和常用的几种编/解码器(E/D)。研究了基于光纤延时线(OFDL)和基于光纤布拉格光栅(FBGs)的可调谐编/解码器,讨论了两种基于光纤延时线的可调方案,对它们的结构和性能进行了分析。讨论了基于光纤布拉格光栅(FBGs)的编/解码器,介绍了光纤布拉格光栅编/解码器的原理和利用压电陶瓷(PZT)调谐光纤布拉格光栅的参数选择。给出了一种基于光纤布拉格光栅阵列的可调谐二维编/解码器结构,并分析了它的主要优点。介绍了基于超结构光纤布拉格光栅(SSFBG)的二进制相移键控(BPSK)编/解码器和可调谐四进制相移键控(QPSK)超结构光纤布拉格光栅编/解码器的构造方法,探讨了光码分多址系统编/解码器的发展前景。
Optical code division multiple access (OCDMA) networks and several typical encoder/decoder (E/D) are introduced. The tunable E/D based on optical fiber delay line (OFDL) and on fiber Bragg gratings (FBGs) have been emphatically investigated. Two schemes of tunable OFDL are presented and their performance is analyzed. The principle of the E/D based on FBGs and the selection of parameters with piezoelectric ceramic (PZT) to tune FBGs are introduced. A two-dimensional tunable structure of E/D based on FBGs arrays are presented, whose merits are analyzed. The construction method of binary phase shift keying (BPSK) and tunable quaternary phase shift keying (QPSK) E/D based on super-structured fiber Bragg grating (SSFBG) are introduced, and the development prospects for OCDMA E/D are analyzed.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第12期1901-1905,共5页
Chinese Journal of Lasers
基金
江苏省自然科学基金(BK2008437)
江苏省高校自然科学基金(07KJB510066)资助课题
关键词
光码分多址
编/解码器
可调谐
光纤延时线
光纤布拉格光栅
超结构光纤布拉格光栅
optical code division multiple access
encoder/decoder
tunable
optical fiber delay line
fiber Bragg gratings
super-structured fiber Bragg grating