We normally say cell phone jammer as 100mW

We normally say  cell phone jammer  as 100mW.
The whole device occupies a smaller space, so that the FEL to the miniaturization and the practical application of a major step forward. On the other hand, people in small periodic undulator pseudospark discharge device and the pseudospark discharge, high voltage power supply and improvement of several new technologies to carry out studies have provided favorable conditions for free-electron lasers to become smaller. At the same time, a few millimeters below the micro-wiggler developed wavelength laser oscillating suitable for the above-mentioned swing low energy and angle dispersive electron beam source development objective of the study. In addition, the use of Cerenkov radiation and the Smith Purcell radiation of new free electron laser, the volume is greatly reduced. In the very bright environment, the laser beam of  cell phone jammer cannot be seen clearly.
The free electron laser ability to light, run quality depends largely on the quality of electron beam quality and the operation of electron accelerators. Due to the progress of the study of laser-cathode RF gun and high-brightness electron storage, promising to obtain high-quality electron beam. The free electron laser device structure is complex, bulky, expensive, while the accelerator is the main part, therefore, free-electron laser research to be solved is the development of miniaturization, simplification of the accelerator. The early 1990s, the average power of the free electron laser has reached 11W. To further improve the mechanism of the free-electron laser, a variety of plasma free electron laser were studied. It is the feature of cell phone jammer with various powers.
And quickly became one of the hot research areas within the free-electron laser [7]. In October 1994, Japan's Kansai academic and cultural city Tsuda Free Electron Laser Research Institute made the MW of the order of the free-electron laser and practical device. This is due to spend two or three decades of success electron linear accelerator, the basic technology of the microwave source and ultra-high vacuum. Development of extreme ultraviolet free electron laser requires a high current storage ring, the long life of the electron gun, as well as 10 - 9Pa ultra-high vacuum and other technology. Self-amplification of spontaneous emission free electron laser is based on one-way to provide another route to the vacuum ultraviolet and X-ray laser propulsion, this free-electron laser may provide a strong pulse of polarized ultra-class laser radiation.  cell phone jammer have various powers.
In addition to the peak value of brightness and high average brightness, tunable electron energy makes this free-electron laser VUV and X-ray radiation unrivaled light. Output power and efficiency and to further shorten the wavelength, especially to explore more effective short wavelength (UV and X-ray) free-electron laser mechanism. The beginning of this century, Hamburg, Germany, researchers reported on the German electron synchrotron vacuum ultraviolet laser to produce 80 ~ 120nm tunable, GW class power, 30 ~ 100fs pulse peak brightness 8 orders of magnitude higher than the current third-generation synchrotron radiation source. 2003 began the study of the of 6nm free electron laser.  cell phone jammer might take more time.