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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。
The high precision full light quantization based on SSFS is discussed. By analyzing the soliton self-frequency shift characteristics, it is found that when the pulse width of the input pulse is 150 fs, the number of quantized bits (NOB) can reach 8 and the corresponding effective bit (ENOB) is 7.02. Smaller pulse width can not guarantee the quantization bit, and a wider pulse width will affect the linearity of the quantization function, reducing the effective bit. The spectral width of 9.8 fs corresponding to 150 fs and the average power of 0.92 W (at a pulse rate of 50 GHz) are also readily available from existing optical techniques. The chirp will widen the pulse width, significantly reducing the quantization bit and the effective bit, it should be avoided.