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光码分多址系统中, 光编解码器是影响系统性能的关键因素之一.自相关峰值旁瓣比(P/W)、自互相关峰值比(P/C)是衡量编解码器性能的两个重要指标.以硅基SOI微环谐振腔为载体, 提出了一种串联三环阵列的二维相干OCDMA编解码器模型.详细研究了耦合系数、损耗系数、阵列间距以及通道间隔对微环谐振腔编解码器性能的影响.结果表明, 半径为50 μm的微环, 环与直波导间耦合系数在0.6–0.7之间, 环与环间耦合系数在0.1–0.2之间, 损耗系数 < 2 dB/cm, 阵列间距大于3 mm, 通道间隔在25–36 GHz间时, 编解码器能够获得良好的性能.Optical en/decoder is one of the most crucial factors affecting the performance of the optical code division multiple access (OCDMA). The autocorrelation peak to maximum wing ratio (P/W) and cross-correlation ratio (P/C) are two important parameters to quantitatively evaluate the performance of the en/decoder.Based on the SOI parallel-cascaded coupled micro-ring reflector, a mathematical model of two-dimensional coherent optical en/decoder is established. Influences of the structure parameters including the coupling coefficient, the loss factor, the array distance, and the channel spacing on P/W and P/C ratios are discussed in detail. Results show that for the micro-ring with a radius of 50 μm, when the ring-bus and ring-ring coupling coefficients are 0.6–0.7 and 0.1–0.2, respectively, the propagation loss is lower than 2 dB/cm, the array distance is greater than 3 mm, and when the channel spacing is given between 25–36 GHz, the proposed structure can have an optimal performance of en/decoding.
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Keywords:
- optical en/decoder of OCDMA /
- auto-correlation peak level over the maximum wing level (P/W) /
- auto-correlation peak level over the maximum cross-correlation level (P/C) /
- micro-ring resonator
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[11] Akhavan H 2013 Optics & Laser Technology 45 717
[12] Ji Z, Jia D G, Zhang H W 2014 Acta Optica Sinica 34 0506002 (in Chinese) [吉喆, 贾大功, 张海伟 2014 光学学报 34 0506002]
[13] Zhang X B, Huang D X, Hong W 2007 Acta Optica Sinica 27 1939 (in Chinese) [张小贝, 黄德修, 洪伟 2007 光学学报 27 1939]
[14] Nawrocka M S, Liu T, Wang X 2006 Appl. Phys. Lett. 89 071110
[15] Tian H, Zhang Y D, Wang H 2008 Acta Phys. Sin. 57 6400 (in Chinese) [田赫, 掌蕴东, 王号 2008 57 6400]
[16] Grover R, Van V, Ibrahim T A 2002 J.Lightw. Technol. 20 900
[17] Han-Yong Ng, Michael Wang R, Daqun Li 2008 Opt. Eng. 47 044601
[18] Guha B, Kyotoku B B C, Lipson M 2010 Optics Expres 18 3487
[19] Ren G H, Chen S W, Cao T T 2012 Acta Phys. Sin. 61 034215 (in Chinese) [任光辉, 陈少武, 曹彤彤 2012 61 034215]
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[1] Heritage J P, Weiner A M 2007 IEEE J. Quantum Electron 13 1351
[2] Zhang Y, Dai Y T, Sun J 2007 Acta Phys. Sin. 56 7034 (in Chinese) [张邺, 戴一堂, 孙杰 2007 56 7034]
[3] Zheng J L, Wang R, Pu T 2011 Chinese Journal of Lasers 38 s105007 (in Chinese) [郑吉林, 王荣, 蒲涛 2011 中国激光 38 s105007]
[4] Dong X W, Lu S H, Feng SC 2008 Chinese Phys. B 17 1029
[5] Huang Q Z, Yu J Z, Chen S W 2008 Chinese Phys. B 17 2562
[6] Cao T T, Zhang L B, Fei Y H 2013 Acta Phys. Sin. 62 194210 (in Chinese) [曹彤彤, 张利斌, 费永浩 2013 62 194210]
[7] Agarwal A, Toliver P, Menendez R 2006 IEEE Photon. Technol. Lett. 18 1952
[8] Agarwal A, Toliver P, Menendez R 2006 J. Lightw. Technol. 24 77
[9] Wang X, Gao Z S 2011 IEEE Photon. Technol. Lett. 23 591
[10] Wang X, Gao Z S 2011 Proceedings of Photonics and Optoelectronics Meetings Wuhan, China, November 02 2011 833302
[11] Akhavan H 2013 Optics & Laser Technology 45 717
[12] Ji Z, Jia D G, Zhang H W 2014 Acta Optica Sinica 34 0506002 (in Chinese) [吉喆, 贾大功, 张海伟 2014 光学学报 34 0506002]
[13] Zhang X B, Huang D X, Hong W 2007 Acta Optica Sinica 27 1939 (in Chinese) [张小贝, 黄德修, 洪伟 2007 光学学报 27 1939]
[14] Nawrocka M S, Liu T, Wang X 2006 Appl. Phys. Lett. 89 071110
[15] Tian H, Zhang Y D, Wang H 2008 Acta Phys. Sin. 57 6400 (in Chinese) [田赫, 掌蕴东, 王号 2008 57 6400]
[16] Grover R, Van V, Ibrahim T A 2002 J.Lightw. Technol. 20 900
[17] Han-Yong Ng, Michael Wang R, Daqun Li 2008 Opt. Eng. 47 044601
[18] Guha B, Kyotoku B B C, Lipson M 2010 Optics Expres 18 3487
[19] Ren G H, Chen S W, Cao T T 2012 Acta Phys. Sin. 61 034215 (in Chinese) [任光辉, 陈少武, 曹彤彤 2012 61 034215]
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