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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。
The optical code division multiple access (OCDMA) system and several commonly used codecs (E / D) are introduced. Tunable encoder / decoder based on fiber delay line (OFDL) and fiber Bragg grating (FBGs) are studied. Two tunable schemes based on fiber delay line are discussed and their structure and performance are analyzed. The encoder / decoder based on Fiber Bragg Gratings (FBGs) is discussed. The principle of fiber Bragg grating encoder / decoder and the parameter selection of tuning Fiber Bragg Gratings by using PZT are introduced. A tunable two-dimensional encoder / decoder structure based on fiber Bragg grating array is presented and its main advantages are analyzed. The construction method of binary phase shift keying (BPSK) encoder / decoder and tunable quaternary phase shift keying (QPSK) superstructure fiber Bragg grating encoder / decoder based on super structure fiber Bragg grating (SSFBG) The development of optical code division multiple access system coder / decoder is discussed.