三维OOC编解码器的设计与实现  

The Design and Realization of Three-dimension OOC Encoder/Decoder

作　　者：解宜原[1] 荣健[1] 苑媛[1] 牛伟[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《量子光学学报》2005年第3期116-119,共4页Journal of Quantum Optics

摘　　要：以OOC编码为基础,利用素数跳频技术,提出一种三维无线光CDMA编码方案。这种编码方案使码重为p的OOC码的容量提高了p2(p-1)2倍,互相关峰值仍为cλ.,自相关旁瓣峰值仍为aλ.。利用法拉第效应和光纤光栅技术设计了编解码器,由于光纤光栅和旋光器的空间位置不同,则光脉冲经过的距离不同,所以每个光脉冲的时间延迟不同,则不同偏振,不同波长的光脉冲在时域上分离,并利用压电陶瓷控制光栅的中心波长和可调谐磁场强度来控制旋光器中偏振方向,实现灵活变址。Based on OOC code, this paper proposes a coding scheme of wireless optical CDMA by using prime frequency hopping. The capability of this code is improved p^2(p-1)~2 times when the code word weight is p. The cross correlation of this code is λ_c. The autocorrelation is λ_a. Based on Faraday effect and fiber grating, an encoder/decoder is devised. Because the Faraday rotation's position and Fiber grating's are different, every optical pulse travels different distances and uses different times. The 'different wavelengh, different polarization' optical pulse is divided in time domain. Using piezoelectricity chinaware to control wavelength and Faraday rotation to control polarization aspect, the address-changeable encoder/decoder is devised.

关 键 词：OOC编码 无线光CDMA 法拉第效应(磁光效应) 编解码器 

分 类 号：O431[机械工程—光学工程]