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
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/13695
SN  - 0946-2171
ER  -