Free-electron laser benefits from "seed" light

all-technology-news.blogspot.c… — Researchers in France and Japan have developed a technique that not only reduces the size of a free electron laser (FEL) but also generates coherent light at X-ray wavelengths down to 32 nm for the first time. The technique, which involves seeding the laser with another light source, could be refined to produce fully-coherent pulses with...