| 基于等效相移光栅的光码分多址编/解码实验 |
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| 引用本文： | 燕萌,姚敏玉,张洪明,张鋆,彭越,王华,鲁涛.基于等效相移光栅的光码分多址编/解码实验[J].中国激光,2006,33(2):21-224. |
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| 作者姓名： | 燕萌 姚敏玉 张洪明 张鋆 彭越 王华 鲁涛 |
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| 作者单位： | 清华大学电子工程系集成光电子学国家重点实验室,北京,100084 |
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| 摘 要： | 基于直接序列扩频(DSSS)的时域编码是目前光码分多址(OCDMA)系统中常用的编码方式。报道了利用带有等效相移(EPS)的超结构光纤布拉格光栅(SSFBG)对重复频率为2.5 GHz,宽度为7 ps的超短光脉冲串进行编/解码的实验,实验中所用码为31位的m序列。正确解码和不正确解码信号的对比度为5∶1,与理论计算结果相符。实验结果表明,等效相移光栅能够代替相移光栅作为光码分多址系统的编/解码器。且当入射脉冲宽度小于码片持续时间时,能获得良好的编/解码效果。
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| 关 键 词： | 光通信 光码分多址 超结构光纤布拉格光栅 等效相移 |
| 文章编号： | 0258-7025（2006）02-0221-04 |
| 收稿时间： | 2005-07-13 |
| 修稿时间： | 2005-10-26 |
OCDMA Encoding/Decoding Experiments Based on Superstructured Fiber Bragg Grating with Equivalent Phase Shift |
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| YAN Meng,YAO Min-yu,ZHANG Hong-ming,ZHANG Jun,PENG Yue,WANG Hua,LU Tao.OCDMA Encoding/Decoding Experiments Based on Superstructured Fiber Bragg Grating with Equivalent Phase Shift[J].Chinese Journal of Lasers,2006,33(2):21-224. |
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| Authors: | YAN Meng YAO Min-yu ZHANG Hong-ming ZHANG Jun PENG Yue WANG Hua LU Tao |
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| Affiliation: | State Key Laboratory on Integrated Optoelectronics , Department of Electronics Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | A direct sequence (DS)-optical code division multiple access (DS-OCDMA) system using superstructured fiber Bragg grating (SSFBG) with equivalent phase shift (EPS) as encoder/decoder for the first time is demonstrated. The SSFBG with EPS shows its full ability to perform encoding and decoding. The contrast ratio between correctly decoded signal and incorrectly decoded signal is 5:1, as predicted by simulation. The experimental results prove that SSFBG with EPS can be used as OCDMA encoder/decoder instead of that with real phase shift (RPS), and when the incident pulse′s width is less than the chip duration, good encoding/decoding performance can be achieved. |
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| Keywords: | optical communication optical code division multiple access superstructured fiber Bragg grating equivalent phase shift |
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