Main fields of work

• Crystal and laser design for increasing the output power of diode-pumped solid-state lasers
• Fiber-based laser beam sources with variable pulse parameter
• Fiber amplifiers for narrow-band laser beam sources

Crystal and laser design

In Nd:YAG solid-state lasers with high average output power the use of laser rods with differently doped segments and a pump wavelength of 885 nm results in an efficient optimization of laser conversion efficiency and thermal management. In this way an output power of more than 750 W with an optical-to-optical conversion efficiency of 58% can be extracted from a compact laser head (50 cm x 20 cm).

Fiber-based laser beam sources with variable pulse parameters

http://www.ot-inlas.de/inlas/pulsar/

Fiber amplification of narrow-linewidth laser sources

The development of high-power, narrow-linewidth laser sources for world-wide scientific projects on gravitational-wave detectors has been advanced in the department for laser development since many years. In the field of fiber based amplifiers the main scientific focus is on nonlinear optical processes such as stimulated Brillouin scattering (SBS) that limit the extractable output power. Concepts for fiber amplifier systems with extremely high power and excellent beam quality for a future generation of detectors are being developed.