2015/07/27 by Ying Chen, Ke Liu, Jing Yang +13
Engineering · Physics and Astronomy · #Solid State Laser Technologies #Laser Design and Applications #Photorefractive and Nonlinear Optics
paper · doi:10.1109/jqe.2015.2461133
We report on a high energy, high peak power 1342-nm Nd:YVO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> picosecond (ps) regenerative amplifier under 880-nm laser-diode (LD) in-band pumping operating from 1 to 10 kHz. The maximum average output power of 1.62 W was obtained with the repetition rate of 10 kHz and the pulse width of 44.9 ps. The corresponding pulse energy and the peak power were up to 0.162 mJ and 3.61 MW with a total optical gain as high as 6.5 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> . The laser beam quality factor of M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> was measured to be 1.75 at the full output power. The maximum pulse energy of 0.243 mJ and the maximum peak power of 5.55 MW were obtained at 1 kHz, resulting in its total optical gain of 9.7 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> . This is the highest pulse energy and the highest peak power for LD-pumped high-beam-quality 1342-nm ps lasers with kilohertz repetition rate reported to date.