An one-end-pumped Nd:YVO 4 laser with fiber-coupled diode is designed. The mode matching between pump mode and laser mode is analyzed, and the optimum mode matching coefficient is obtained by optimizing the pump mode. Based on the optimal pump mode, a 14.2W TEM00 mode CW laser is obtained with a optical-optical efficiency of 55.7% at 1064 nm, with M 2 factors of M 2 x = 1.16, M 2 y = 1.15. In Q-switching operation, 13.8W average power at a pulse repetition rate of 200 kHz is produced, with a stability of pulse peak value < 5%.
An edge-pumping scheme for a quasi-three-level solid-state laser using asymmetric crystal is reported. The scheme uses a thin disk laser configuration with the pump light incident from disk edges. The pump light propagates through the disk along the zigzag path and repeatedly passes the gain medium, thus improving the pump uniformity and absorption efficiency. A maximum output power of over 123 W was achieved from an edge-pumped composite Yb:YAG/YAG thin disk laser, with slope efficiency of 34.8% and beam quality M 2 ≈ 20.
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