Demonstration of a cavity-based pulse compression system for pulse shape correction

Limit for Pulse Compression by Pulse

Demonstration of a cavity-enhanced optical parametric chirped-pulse amplification system.

The use of a low finesse enhancement cavity resonant with a low average power (<1 W) and a high repetition rate (78 MHz) pump source is shown to achieve 55% conversion efficiency into signal and idler from the coupled pump in an optical parametric process, whereas an equivalent amount of pump power in a single-pass configuration leads to negligible conversion. Careful comparison of the intracav...

Wavelet-based Analysis for Pulse Period of Earthquake Ground-motions

Pulse period of earthquake records has been known as a key parameter in seismology and earthquake engineering. This paper presents a detailed characterization of this parameter for a special class of earthquake records called pulse-like ground motions. This type of motions often resulting from directivity effects is characterized by a strong pulse in the velocity time history of motion, in norm...

Shiva Star Inductive Pulse Compression System

THE SHIVA STAR capacitor bank, a 120 KV parallel bank storing 9.5 MJ with a short circuit current of almost 90 MA, at the AFWL is the world's highest energy, fast capacitor bank. The approximately 3 microsecond short circuit current risetime is shortened by an inductive store/opening switch power conditioning system in which a total inductance of about 10 nH is charged with 35 MA currents. Elec...

Shape of a Barkhausen Pulse

The average shape of the pulse in Barkhausen noise has been recently proposed as a tool to compare models and experiments. We compute theoretically the pulse shape of Barkhausen noise in a model describing the motion of a domain wall in an effective Brownian potential. In this framework, the pulse shape is related to the properties of the excursion of a random process in a c log(x)− kx potentia...