基于超结构布拉格光纤光栅的光码分多址系统的研究
首发时间:2011-03-14
摘要:基于超结构布拉格光纤光栅(SSFBG)的光码分多址(OCDMA)系统的误码率(BER)性能是通过不同光脉冲宽度和光栅折射率调制幅度研究的。与BER相对应的串扰比则需要考虑不同的数据速率。仿真结果表明:增加输入脉冲的宽度或者光栅折射率的调制幅度可以使BER的性能得到明显降低。而且,对于固定不变的码长和码片比,当增加输入脉冲的宽度时,低数据速率系统有较好的冗余;当增加光栅折射率的调制幅度时,高数据速率系统有较好的冗余。
关键词: 光码分多址 超结构布拉格光纤光栅 输入脉冲的宽度 光栅折射率的调制幅度 误码率性能 串扰比
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Investigation of OCDMA system based on super structured fiber Bragg grating
Abstract:The bit error rate (BER) performance of a superstructured ?ber Bragg grating (SSFBG)-based optical code division multiple access (OCDMA) system is investigated with different input pulse widths and grating refractive index modulation amplitudes, and the corresponding crosstalk ratio is considered at different data-rates. Simulation results show that increasing the input pulse width or grating refractive index modulation amplitude will degrade the BER performance apparently. Moreover, with ?xed code length and chip-rate detection, a lower data-rate system has better tolerance to an increasing input pulse width, while a higher data-rate system has better tolerance to an increasing grating refractive index modulation amplitude.
Keywords: Optical code division multiple access (OCDMA) Super structured fiber Bragg grating (SSFBG) Input pulse width Grating refractive index modulation amplitude BER performance Crosstalk ratio
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