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  - 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  - 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  -