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个宽带数字化仪，具有足够的存储器存储，用于记录单次激光脉冲事件，以研究等离子体约束。 在这些研究中使用的激光脉冲具有大于10 GHz的带宽。 商业上可用的数字化仪要么带宽不足，要么价格昂贵。 已经演示了一种带宽超过10 GHz、实时存储器采集和采样率为16 GigaSamples/s（GSa/s）的数字化仪。 本研究的目标是实现0.5皮秒的孔径不确定性，这需要非常线性的数字化比较器。 负反馈已被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的孔径不确定性相当于10 GHz下的6个有效比特和2.5GHz下的8个有效比特）。 提出了一种能在真实的时间内校正任何剩余非线性效应的非线性逻辑。 在第一阶段，目标是在20 GSa/s下证明该方法。 提供25 ns的片上20 GHz的存储器和自触发能力的可行性也将被证明。 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器的亚纳秒事件。 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个通用的瞬态数字化仪。 该项目的瞬态数字化仪的成功部署可以弥补最近美国产品的退出，这导致外国数字化仪产品占据了最高性能的优势。

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.