Nonlinear Fiber-Optics with Picosecond Pulses for all-Optical WDM/TDM Systems

我们建议建立一个基于参数放大的缓存存储缓冲器，它将能够在Gb/s范围内工作，允许存储千兆位的数据。我们将开展实验，探索各种读、写、擦除存储数据模式的方法。我们的工作表明，超快参数非线性既可以提供宽带可调增益，也可以用于时钟恢复的动态增益调制。我们建议将两者结合起来，以展示一个光学锁相环，原则上可以非常快，因为它依赖于克尔非线性包络相鉴别。这样的锁相环也是波长可调的——这是一个非常重要的特性，因为它为标准的3R全光再生器增加了波长转换功能。在进行上述实验研究的同时，我们还将开发各种光学系统的数值模型。这将提供一个设计工具，以确定参数值，从而使实验装置最有效地运行。我们以前已经证明了在光纤线路中稳定传播亚皮秒脉冲的可能性，其中使用共轭增益来补偿线性损耗。我们建议组装一个再循环回路实验，其中线性损失将由一对非退化参数（共轭）放大器补偿。两个放大器的位置将根据进一步的理论/数值结果来选择。我们将通过各种信号和噪声测量从实验和理论上研究亚皮秒脉冲的稳定性，并将实验结果直接与数值模拟进行比较。实验将在1550和1300 nm波长区域进行，以证明参数放大的宽带能力。

We propose to build a cache storage buffer based upon parametric amplification that will be capable of operating in the Gb/s range, permitting kbits of data to be stored. We will carry out experiments to explore various ways of reading, writing, and erasing the stored data patterns. Our work has shown that the ultrafast parametric nonlinearity can be exploited either to provide broad-band tunable gain or dynamic gain modulation for clock-recovery. We propose to combine the two to demonstrate an optical phase-lock loop, which in principle can be extremely fast as it relies on the Kerr nonlinearity for envelope-phase discrimination. Such a phase-lock loop will also be wavelength tunable-a feature that is quite important as it adds the function of wavelength conversion to the standard 3R all-optical regenerator. Simultaneous to the above experimental studies we will also develop numerical models of the various optical systems. This will provide a design tool to determine the parameter values allowing the most efficient operation of the experimental setups. We have previously demonstrated the possibility of stably propagating sub-picosecond pulses in fiber lines in which conjugating gain is used to compensate the linear loss. We propose to assemble a re-circulating loop experiment in which linear loss will be compensated by a pair of non-degenerate parametric (conjugating) amplifiers. The location of the two amplifiers will be chosen based upon further theoretical/numerical results. We will experimentally and theoretically study the stability properties of the sub-picosecond pulses by making various signal and noise measurements, and will compare the experimental results directly with numerical simulations. The proposed experiments will be performed in both the 1550 and 1300 nm wavelength regions in order to demonstrate the wideband capability of parametric amplification.