TY - JOUR A1 - Ostermeyer, Martin A1 - Heuer, Axel A1 - Menzel, Ralf T1 - 27 Watt average output power with 1.2*DL beam quality from a single rod Nd:YAG-Laser with phase conjugating SBS- mirror BT - Siebenundzwanzig Watt average output power with 1.2*DL beam quality from a single rod Nd:YAG-Laser with phase conjugating SBS-mirror Y1 - 1998 ER - TY - JOUR A1 - Ostermeyer, Martin A1 - Menzel, Ralf T1 - 34 Watt flash lamp pumped single rod ND:YAG laser with 1.2 * DL beam quality via special resonator design BT - Vierunddreißig Watt flash lamp pumped single rod ND:YAG laser with 1.2 * DL beam quality via special resonator design Y1 - 1997 ER - TY - JOUR A1 - Ostermeyer, Martin A1 - Menzel, Ralf T1 - 50 Watt average output power with 1.2*DL beam quality from a single rod Nd:YALO laser with phase-conjugating SBS mirror BT - Fünfzig Watt average output power with 1.2*DL beam quality from a single rod Nd:YALO laser with phase- conjugating SBS mirror Y1 - 1999 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 - JOUR A1 - Kappe, Philip A1 - Menzel, Ralf A1 - Ostermeyer, Martin T1 - Analysis of the temporal and spectral output properties of a mode-locked and Q-switched laser oscillator with a nonlinear mirror based on stimulated Brillouin scattering N2 - The emission dynamics of a mode-locked laser oscillator with a nonlinear mirror based on stimulated Brillouin scattering (SBS) has been investigated with regard to its spectrum and to its intensity distribution. The investigation was carried out experimentally as well as by numerical simulations. The laser yields trains of pulses with measured durations of 410 ps and energies of the single pulse of up to 2 mJ. Two theoretical models describing the complex emission dynamics of a mode-locked SBS-laser oscillator are introduced. The first model consists of spectrally resolved laser rate equations and thus describes the mode locking in the frequency domain by the superposition of the longitudinal resonator modes. The SBS-Q-switch is incorporated by a phenomenological description of the time dependent SBS reflectivity. Numerical simulations based on this model yield the evolution of a few 100 longitudinal laser modes and the corresponding intensity distribution during the course of a Q-switch pulse with 10-ps resolution. The influences of the different components on the spectrum and thus on the pulse duration will be discussed. The second model describes all occurring dynamics in the time domain providing easy access to the study of misalignment on the output dynamics. Results of numerical simulations of both models and measurement results are compared Y1 - 2006 UR - http://pra.aps.org/ U6 - https://doi.org/10.1103/Physreva.74.013809 SN - 1050-2947 ER - TY - JOUR A1 - Klemz, Guido A1 - Kubina, P. A1 - Ostermeyer, Martin A1 - Menzel, Ralf T1 - Diode pumped high power TEM_00 Nd:YAG rod laser with birefringence compensation Y1 - 2001 ER - 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 - 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 - JOUR A1 - Ostermeyer, Martin A1 - Klemz, Guido A1 - Menzel, Ralf T1 - Double rod Nd:YAG laser with 180 W average output and diffraction limited beam quality via path-matched birefringence compensation Y1 - 2002 SN - 0-8194-4368-9 ER -