Overview
Linear and Nonlinear THz Science
Optical Fibers and Fiber Lasers
Quantum Optics
Soft X-Ray Laser
Program
Equipment
Ultrafast Molecular Spectroscopy
Last update: 27.10.2014
The X-Ray Laser Lab - The Balmer Group
The  X-Ray Laser Lab - The Balmer Group
Investigating laser-produced plasmas is of considerable importance to many research fields, such as inertial fusion, short-wavelength laboratory sources, next generation lithography and water-window bio-microscopy. By generation of a line focus on a target material, using a Tera-Watt laser driver, the induced plasma column behaves like a single-pass gain medium. Amplification by stimulated emission (ASE) has been achieved in the soft x-ray spectral region with extremely narrow linewidths of <10-4 (rel. width) and 10+11 photons/shot.

Our research focuses on two main areas:

- X-ray laser fundamentals, such as enhancement of conversion efficiency, efficient grazing-incidence pumping (GRIP), and generation of shorter and shorter wavelength (e.g. <10 nm) at saturated emission in a laboratory-scale facility;

- Increase of the X-ray laser repetition rate from the single-shot up to a few Hz.

The experiments are carried out on the chirped pulse amplification (CPA) Nd:glass laser system at our institute ("BeAGLE" or Bern Advanced Glass Laser for Experiments), which is capable of delivering up to 30 J in a 1-ps duration pulse. The experiments are complemented by a suite of in-house available computational codes for optical design, plasma dynamics and atomic physics.
 
Balmer Jürg, Prof. Dr. +41 31 631 89 46  
Portrait Prof. Dr. Jürg Balmer
Division:Laser Physics
Group:Soft X-Ray Laser
Status:Head of group
 
Jia Fei +41 31 631 85 29  
Portrait Fei Jia
Division:Laser Physics
Group:Soft X-Ray Laser
Status:Ph.D. student
 
Siegrist Michael +41 31 631 85 29  
Portrait Michael Siegrist
Division:Laser Physics
Group:Soft X-Ray Laser
Status:Ph.D. student
 
Staub Felix, Dr. +41 31 631 85 29  
Portrait Dr. Felix Staub
Division:Laser Physics
Group:Soft X-Ray Laser
Status:Postdoc