Abstract
A high-power diode-end-pumped continuous-wave (CW) passively mode-locked picosecond (ps) 1319 nm Nd:YAG laser was demonstrated with a semiconductor saturable absorber mirror (SESAM). The oscillator cavity was accurately designed to optimize the laser beam radii in the centre of crystal and on the SESAM. At an absorbed pump power of 102 W, the maximum mode-locked output power of 10.3 W was achieved with pulse width of 27.1 ps and a beam quality factor M2 = 1.38 at the repetition rate of 76 MHz, corresponding to an optical-optical efficiency of 10.1%. To the best of our knowledge, this is the first demonstration of diode-pumped passively CW mode-locked ps Nd:YAG laser at 1319 nm with a SESAM.
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