1. Astrophysics and free electron lasers were her specific areas of study. 2. Other types can include slab solid state and free electron lasers . 3. X-ray free electron lasers use long undulators. 4. A free electron laser allows higher frequencies. 5. Coherent X-ray beams could be produced by modern synchrotron radiation sources and free electron lasers . 6. In most cases, the theory of classical electromagnetism adequately accounts for the behavior of free electron lasers . 7. Free electron lasers offer light that is monochromatic and coherent, as well as narrow in space and angle spread.8. Vladimir Baryshevsky pioneered research of the Volume Free Electron Laser a new type of the Free-electron laser. 9. They are also used to form the cavity resonator ( or optical cavity ) in fiber lasers and free electron lasers . 10. Also in the 1950s, Sturrock invented a number of implements, including a novel microwave tube later dubbed the " Free electron laser ."