An ultrafast all-optical gate
An ultrafast all-optical gate
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超快全光闸
DOI：
10.1109/jqe.1983.1071766
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发表时间：
1983
影响因子：
2.5
通讯作者：
E. Ippen
中科院分区：
文献类型：
--
作者：
A. Lattes;H. Haus;F. Leonberger;E. Ippen
提出了一种基于波导干涉仪中非线性光相互作用的超快光波导门。一串信号脉冲通过控制脉冲进行门控，控制脉冲只改变干涉仪的一条臂的折射率。使用在linbo3衬底上制作的2厘米长的改进Mach-Zehnder干涉仪来演示操作原理。实验采用近红外染料激光器，在\ λ = 840nm处产生5ps脉冲。在峰值控制功率为2w时，获得了10-3量级的最大调制。通过实验，我们确定了linbo3的合适非线性系数为：{2}= 3 \乘以10^{-9}(MW/cm2)-1。作为该结构可能的应用，我们描述了一个全光逆变器、一个异或门和一个与门。最后简要介绍了一种基于几个全光逻辑门的随机数产生编码器和解码器。
We present a new ultrafast optical waveguide gate based on a nonlinear optical interaction in a waveguide interferometer. A train of signal pulses is gated by control pulses which change the refractive index in only one arm of the interferometer. The principle of operation is demonstrated using a modified Mach-Zehnder interferometer, 2 cm long, fabricated in a LiNbO3substrate. The experiments were performed with a near-infrared dye laser which produced 5 ps pulses at\lambda = 840nm. A maximum modulation on the order of 10-3was obtained for a peak control power of 2 W. Experimentally, we determined the appropriate nonlinear coefficient of LiNbO3to ben_{2} = 3 \times 10^{-9}(MW/cm2)-1. As possible applications of the structure we describe an all-optical inverter, an XOR gate, and an AND gate. We conclude with a brief description of a random number generator encoder and decoder based on a few all-optical logic gates.