Scientists world-wide are working on lasers with shorter and shorter wavelengths. The shorter the wavelength applied, the smaller the structures one can see, investigate and produce.
"For the first time we are able to set up such a short-wave emitting laser”, says MBI-scientist Dr. Peter Viktor Nickles. Up to now, most laboratories world-wide use solid-state lasers to deliver to the X-ray lasers a necessary energy, a process called pumping. However, these conventional pumping lasers are not stable enough to enable clear conclusions from a limited number of shots. “Particularly in sequence of measurements, averaging of the signals will smear the results”, says Nickles. Diode-lasers are far more stable and thus more suitable for the pumping process. They lead to more exact results and also allow high repetition rates, i.e. fast repeating pulses.
“Our concept to develop an X-ray laser pumped by a diode pumped Yb:YAG laser is completely new”, says Nickles. At the beginning MBI aims at repetition rates up to 100 pulses per second (100 Hz). This is only possible with diode pumped lasers. The new X-ray laser should be ready for use by the end of 2007. “This marks a milestone in the development of X-ray lasers”, says Nickles. The Investitionsbank Berlin supports the MBI project through a special subsidizing programme for the promotion of research, innovation and technology (the German abbreviation is ProFIT), which is embbeded in the EU EFRE programme.
The neighbouring Ferdinand Braun Institute (FBH) is also involved in this research project. FBH provides the special diode-lasers. These light-sources are based on new designs of laminar structures (epitaxy) and lateral structuring. The highly brilliant and efficient laser- diodes emit at wavelengths about 935 nanometers and allow simple and reliable beam formation at low production costs.
One of the great advantages of such an X-ray laser is its comparatively small size. Furthermore, the diode-based pumping lasers require less energy than solid-state pumping lasers. A couple of desks of standard size would be sufficient to build such an X-ray laser. Thus, an intense short-wave light-source can easily be moved – a feature that is especially interesting for industrial applications.
Nickles comments: “Their flexibility and easy transport make them an interesting source of short-wave pulses complementary to short-wave free electrons lasers (FEL) which work as individual large-scale facilities based on particle accelerators.”
“Table-top X-ray lasers were an important topic of the 10th International Conference on X- Ray Lasers (ICXRL) in Berlin-Adlershof”, says Nickles who, together with his colleagues, has organized the traditional meeting. „Some well-known parameters were improved by colleagues”, reports Nickles on other talks at the conference. One group documented that an X-ray laser was transferred from one laboratory to another and successfully assembled again. More than hundred active participants as well as numerous guests from altogether fourteen countries had come to Berlin.
Josef Zens | alfa
Major discovery in controlling quantum states of single atoms
20.02.2018 | Institute for Basic Science
Observing and controlling ultrafast processes with attosecond resolution
20.02.2018 | Technische Universität München
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
20.02.2018 | Life Sciences
20.02.2018 | Medical Engineering
20.02.2018 | Physics and Astronomy