Abstract
A single-axial-mode, passively Q-switched (PQS) diode-pumped Nd:YAG laser, generating a diffraction- limited beam train of ≈40-60 µJ, ∼500-ps pulses with adjustable repetition rate in the range 1-10 kHz, was effi- ciently amplified by a single side-pumped Nd:YVO4 bounce amplifier. After double-pass amplification, ≈1-MW pulse peak power with 577-ps duration and 545-µJ energy was achieved, still maintaining diffraction-limited beam perfor- mance. The average output power was 5.45 W at 10 kHz, corresponding to 13% extraction efficiency. The high bright- ness of this laser system seems ideal for nonlinear optics and some particular laser processing applications.
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