光学学报, 2015, 35 (3): 0319004, 网络出版: 2015-02-04   

基于孤子自频移现象的高比特全光量化仿真研究

Investigation on High-Bit All Optical Quantization Based on Soliton Self-Frequency Shift Effect
作者单位
1 上海交通大学区域光纤通信网与新型光通信系统国家重点实验室, 上海 200240
2 中国人民解放军装备学院光电装备系, 北京 101416
摘要
探讨了基于孤子自频移(SSFS)效应的高精度全光量化技术。通过仿真分析孤子自频移特性,发现当输入脉冲的脉宽在150 fs时,量化比特位(NOB)可以达到8,对应的有效比特位(ENOB)为7.02。更小的脉宽无法保证量化比特位,而更宽的脉宽则会影响量化函数的线性度,降低有效比特位。150 fs对应的谱宽9.8 nm 和平均功率0.92 W(50 GHz的脉冲速率下)也都可以较容易地由已有的光学技术得到。而啁啾会展宽脉宽,显著降低量化比特位和有效比特位,因此需尽量避免。
Abstract
The high-precision all optical quantization technology based on soliton self-frequency shift (SSFS) effect is investigated. It is still unclear whether this technology is able to achieve high-precision quantization although some experimental results have been reported. Investigating the properties of SSFS effect by simulation, it is found that for a soliton pulse with optimal t=150 fs, the number of bits (NOB) can be up to 8 with the effective number of bits (ENOB) equal to 7.02. Narrower pulse width cannot obtain the same NOB whereas wider pulse width affects the linearity of the quantization function and reduces the ENOB. A pulse width of 150 fs requires a bandwidth of 9.8 nm and an average power of 0.92 W under 50 GHz sampling pulse rate, which is within the capability of current optical technologies. Chirp broadens the pulse width and reduces the NOB and ENOB significantly and thus should be avoided.

吴侃, 陈颖, 陈向宁, 陈建平. 基于孤子自频移现象的高比特全光量化仿真研究[J]. 光学学报, 2015, 35(3): 0319004. Wu Kan, Chen Ying, Chen Xiangning, Chen Jianping. Investigation on High-Bit All Optical Quantization Based on Soliton Self-Frequency Shift Effect[J]. Acta Optica Sinica, 2015, 35(3): 0319004.

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