A high-average-power, laser-diode, end-pumped nanosecond multi-pass Innoslab Nd:YAG amplifier was demonstrated. With effective shaping of the electro-optically Q-switched Nd:YVO4 seed laser, a 45W seed laser at the pulse repetition frequency of 50 kHz was amplified to 212W with the pump power of 1145W, and the corresponding optical-to-optical efficiency was 14.6% and the slope efficiency was 17.8%.
In this paper, we reported what we believed to be potential improved performance for a Nd:YVO4 discrete path Innoslab amplifier configuration based on a plane-plane resonator system. A 95W, 30KHz laser output was obtained with the Innoslab amplifier. The corresponding optical to optical efficiency was 28.8%. The beam quality factors of M2 were 1.54 in the horizontal direction and 1.43 in the vertical direction, respectively.
Using a slab shaped laser media can effectively reduce thermally induced strain and aberration. In this paper we report the experimental results obtained using an end pumped Nd:YVO4 slab laser with a hybrid resonator. With this design we measured 110W output with the beam quality of 1.3 and 1.5 in two orthonormal directions.
An efficient second harmonic generation of diode end-pumped electro-optical q-switched Nd:YVO4 slab laser is demonstrated. A maximum output power of 15.6W at 532nm was obtained at a repetition rate of 40kHz, the corresponding conversion efficiency was 60% and the pulse width was 11.3ns. At a repetition rate of 10kHz, the pulse energy of 532nm was 1.2mJ and the pulse width was as short as 5ns. The beam quality was M2 < 1,3.