Optical directed logic is a novel logic operation scheme that employs electrical signals as operands to control the working states of optical switches to perform the logic operations. In this Letter, we propose and demonstrate an integrated photonic circuit which can implement five different optical logic operations by utilizing two optical modes. The proposed device is fabricated on a silicon-on-insulator substrate by using electron beam lithography and inductively coupled plasma etching processes. The static experimental results show that the fabricated device can implement five different operations correctly—XOR, XNOR, NOR, NOT, and AND—from which we can see that the signal-to-noise ratios are larger than 17.6 dB over the entire C band for all five logic functions. At last, all five logic operations with the speed of 10 Kbps are demonstrated. The proposed device with simple structure, large bandwidth, and versatility would be a promising candidate for information processing in optical mode division multiplexing networks.

中文翻译：

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使用集成光子电路演示各种光学定向逻辑操作

光学定向逻辑是一种新颖的逻辑操作方案，该方案采用电信号作为操作数来控制光学开关的工作状态以执行逻辑操作。在这封信中，我们提出并演示了一种集成光子电路，该电路可以通过利用两种光学模式来实现五种不同的光学逻辑运算。通过使用电子束光刻和电感耦合等离子体刻蚀工艺，将拟议的器件制造在绝缘体上硅衬底上。静态实验结果表明，制成的器件可以正确实现五个不同的操作-XOR，XNOR，NOR，NOT和AND-从中我们可以看到，在整个C波段上，信噪比均大于17.6 dB所有五个逻辑功能。最后，演示了速度为10 Kbps的所有五个逻辑操作。