Open AccessImproving the brightness of side pumped power amplifiers by using core doped ceramic rods
Author(s) -
A. Strasser,
Martin Ostermeyer
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.006687
Subject(s) - optics , rod , materials science , cladding (metalworking) , amplifier , core (optical fiber) , laser , laser beam quality , brightness , refractive index , beam (structure) , optoelectronics , laser beams , physics , medicine , alternative medicine , cmos , pathology , metallurgy
In side pumped laser head geometries good extraction of energy has to be weighted against diffraction effects of the amplified beam. Beam clipping at the aperture of laser rods can be avoided by using an undoped cladding around the doped core. The wings of e.g. Gaussian beams can be accommodated in the cladding. Phase distortion by the refractive index step of the rod can be compensated by a phase conjugating mirror in double pass configuration. In our proof of principle experiment the brightness of the beam from core doped amplifier rods was shown to be doubled compared to a conventional rod of the same outer diameter.