TY  - BOOK
A1  - Ostermeyer, Martin
A1  - Kappe, Philip
A1  - Menzel, Ralf
A1  - Wulfmeyer, Volker
T1  - Diode-pumped Nd : YAG master oscillator power amplifier with high pulse energy, excellent beam quality, and frequency-stabilized master oscillator as a basis for a next-generation lidar system
N2  - A pulsed, diode-laser-pumped Nd:YAG master oscillator power amplifier (MOPA) in rod geometry, frequency stabilized with a modified Pound-Drever-Hall scheme is presented. The apparatus delivers 33-ns pulses with a maximum pulse energy of 0.5 J at 1064 nm. The system was set up in two different configurations for repetition rates of 100 or 250 Hz. The beam quality was measured to be 1.5 times the diffraction limit at a pulse energy of 405 mJ and a repetition rate of 100 Hz. At 250 Hz with the same pulse energy, the M-2 was better than 2.1. The radiation is frequency converted with an efficiency of 50% to 532 nm. This MOPA system will be the pump laser of transmitters for a variety of high-end, scanning lidar systems. (C) 2005 Optical Society of America
Y1  - 2005
ER  - 
TY  - BOOK
A1  - Mudge, Damien
A1  - Ostermeyer, Martin
A1  - Ottaway, D.
A1  - Veitch, Peter John
A1  - Munch, Jesper
A1  - Hamilton, Murray
T1  - High-power Nd:YAG laser using stable-unstable-resonators
Y1  - 2002
ER  - 
TY  - BOOK
A1  - Ostermeyer, Martin
A1  - Kappe, Philip
A1  - Menzel, Ralf
A1  - Sommer, S.
A1  - Dausinger, Friedrich
T1  - Laser drilling in thin materials with bursts of ns-pulses generated by stimulated Brillouin scattering (SBS)
N2  - A passively Q-switched laser with a nonlinear mirror on the basis of stimulated Brillouin scattering (SBS), generates bursts of pulses with a few 10 ns pulse duration and a separation between 20-90 mu s. Percussion drilling and trepanning are performed in different materials with 1 mm thickness. The optimum parameter set of these pulse trains with regard to the burr height and ablation rate is investigated. Differences in the processing results between single pulse and multi pulse structures are discussed. In addition the laser allowed for transiently mode locked operation. Results for mode locked and merely Q-switched operation were compared
Y1  - 2005
ER  - 
TY  - BOOK
A1  - Heuer, Axel
A1  - Hänisch, Christoph
A1  - Ostermeyer, Martin
A1  - Menzel, Ralf
T1  - Low Power Threshold Phase Conjugating Mirrors by SBS in Yb-doped Fiber Amplifiers
Y1  - 2002
ER  - 
TY  - BOOK
A1  - Ostermeyer, Martin
A1  - Brandenburg, Ingo
T1  - Simulation of the extraction of near diffraction limited Gaussian beams from side pumped core doped ceramic Nd:YAG and conventional laser rods
N2  - The application of the recently developed core doped ceramic Nd:YAG rods has the potential to provide better beam qualities compared to conventional rods since the hard aperture of the rod's boundary can be made wider while the width of the gain region remains the same. Thus, beam truncation and consequential diffraction can be reduced. We apply a finite elements model to calculate the resulting refractive index profiles in conventional and core doped rods. Propagating a Gaussian beam through both rod geometries the impact of aberrations and diffraction is compared for different side pumped scenarios. The potential advantage of the core doped geometry is discussed. (c) 2005 Optical Society of America
Y1  - 2005
ER  -