SBIR Phase I: A Self-Triggered Pulse Acquisition System with Greater than 10 GHz Bandwidth

9861038这个小型企业创新研究第一阶段项目将开发一种宽带数字转换器，具有足够的存储空间，用于记录用于研究等离子体约束的单次激光脉冲事件。这类研究中使用的激光脉冲的带宽大于10 GHz。商业上可用的数字转换器要么带宽不足，要么昂贵得令人望而却步。一种带宽大于10 GHz、实时获取内存、采样率为16G/S(GSA/S)的数字化仪已被演示。这项研究的目标是达到0.5皮秒的孔径不确定度，这需要非常线性的数字化比较器。负反馈用于获得一定程度的线性度，但不足以获得所需的性能(0.5ps的孔径不确定度相当于10 GHz时的6个有效位和2.5 GHz时的8个有效位)。一种超导逻辑已经被开发出来，用于实时校正任何剩余的非线性效应。在第一阶段，目标是在20 GSA/S的情况下演示该方法。还将演示提供25 ns的片上20 GHz存储器和自触发能力的可行性。如果成功，该项目将能够更好地测量高端电子产品、通信网络和高速激光的亚纳秒事件。其他政府应用包括数字雷达、电子战和安全通信。主要的商业应用将是一种通用的瞬时数字化仪。该项目的一个瞬时数字转换器的成功部署可以弥补最近一款美国产品的召回，这导致一款外国数字转换器产品占据了性能最高的位置。

9861038 This Small Business Innovation Research Phase I project will develop a wide-bandwidth digitizer with adequate memory storage needed for recording single-shot laser pulse events for studying plasma confinement. The laser pulses used in such studies have bandwidths greater than 10 GHz. Commercially available digitizers either have inadequate bandwidth, or are prohibitively expensive. A digitizer with greater than 10 GHz bandwidth, real-time memory acquisition, and a sampling rate of 16 GigaSamples/s (GSa/s) has been demonstrated. The goal of this research is to achieve 0.5 picosecond aperture uncertainty which requires extremely linear digitizing comparators. Negative feedback has been used to obtain a certain degree of linearity, but not enough to obtain the required performance (an aperture uncertainty of 0.5 ps is equivalent to 6 effective bits at 10 GHz and 8 effective bits at 2.5 GHz). A superconductive logic for correcting any remaining nonlinear effects in real time has been developed. In Phase I, a goal is to demonstrate this method at 20 GSa/s. The feasibility for providing 25 ns of on-chip 20 GHz memory and self-triggering capability will also be demonstrated. If successful, the project will enable better measurements of sub-nanosecond events for high-end electronics, communications networks, and high-speed lasers. Other government applications include digital radar, electronic warfare, and secure communications. The prime commercial application will be a general-purpose transient digitizer. The successful fielding of a transient digitizer from this project could compensate for the recent withdrawal of a U.S. product, which has resulted in the ascendancy of a foreign digitizer product to the position of highest performance.