A nonlinear optical loop mirror-based linear cavity swit- chable multi-wavelength erbium-doped fiber laser

A nonlinear optical loop mirror (NOLM)-based linear cavity switchable multi-wavelength erbium-doped fiber (EDF) laser is proposed and experimentally demonstrated. Due to the characteristics of the intensity-dependent transmissivity, the NOLM can effectively mitigate the mode competition of the homogenous broadening gain medium, so that the multi-wavelength lasing can be achieved at room temperature. By adjusting the states of the polarization controllers (PCs), the number of the lasing wavelengths in the proposed laser can be adjusted flexibly from 11 to 13 with a wavelength spacing of 0.4 nm around the wavelength of 1 530 nm.     

可监管的比特币隐私保护混淆服务

随着比特币隐私保护研究的深入,比特币作为一种新型“数字货币”变得更加难以监管。针对该问题,提出了一种可监管的比特币隐私保护混淆方案RBmix。RBmix模型使用公平盲签名算法,并引入可信第三方,具有可监管性、匿名性、可扩展性、比特币兼容性以及抗DoS攻击性。实验结果表明RBmix协议具有良好的扩展性和执行效率。