TY  - JOUR
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  - In the original publication [Ostermeyer et al., Appl. Opt., 44, 582-590 (2005)], Fig. 5 appeared twice as Figs. 4 and 5. This inaccuracy is corrected here. (c) 2005 Optical Society of America
Y1  - 2005
SN  - 0003-6935
ER  - 
TY  - JOUR
A1  - Kappe, Philip
A1  - Ostermeyer, Martin
A1  - Menzel, Ralf
T1  - Active mode locking of a phase-conjugating SBS-laser oscillator
N2  - We present a flashlamp-pumped Nd: YAG laser simultaneously emitting pulse structures on microsecond, nanosecond and picosecond time scales. Within a microsecond flashlamp pump pulse a nonlinear reflector based on stimulated Brillouin scattering (SBS) generates several Q-switch pulses. The phase-conjugating effect of the SBS reflector provides a compensation of phase distortions generated inside the laser rod, resulting in transverse fundamental mode operation. Additional acousto-optic loss modulation inside the resonator leads to mode locking. As a result, each Q-switch pulse is subdivided into several picosecond pulses. Energies of up to 2 mJ for the mode-locked pulses with durations between 220 and 800 ps are demonstrated. The wide variability of the laser's temporal output parameters as well as its high beam quality make it a splendid tool for fundamental research in laser materials processing
Y1  - 2005
SN  - 0946-2171
ER  - 
TY  - JOUR
A1  - Kappe, Philip
A1  - Ostermeyer, Martin
A1  - Menzel, Ralf
T1  - Active mode locking of a phase-conjugating SBS-laser oscillator
Y1  - 2005
SN  - 0946-2171
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  - 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  -