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以半导体光放大器为非线性元件的双环耦合全光缓存器(DLOB)为基础,实现了速率为2.5Gb/s双波长数据的并行缓存。不同波长光信号合成后的功率随机波动,导致由半导体光放大器交叉相位调制产生的相位差随机波动。在考虑吸收损耗的情况下,对常用的半导体光放大器增益特性曲线进行了修正并与实测值拟合,得到了更为准确的增益特性曲线。在此基础上进行了理论分析,提出了通过调节控制光功率到最佳点以便减小相位差波动的方法。
Based on the dual-ring coupled all-optical buffer (DLOB) with a semiconductor optical amplifier as a nonlinear element, a parallel buffer of 2.5Gb / s dual-wavelength data is realized. The power of the optical signals with different wavelengths randomly fluctuates, resulting in random fluctuation of the phase difference caused by the cross-phase modulation of the semiconductor optical amplifier. Taking the absorption loss into consideration, the gain characteristic curve of the common semiconductor optical amplifier is modified and fitted with the measured value to obtain a more accurate gain characteristic curve. Based on this, a theoretical analysis is made and a method of reducing the phase difference fluctuation by adjusting the optical power to the optimum point is proposed.