Short pulse diode-pumped Tm:YAG slab laser electro-optically Q-switched by RbTiOPO4 crystal

• We have reported an RTP EO Q-switched Tm:YAG slab laser directly pumped by a 785 nm laser diode.
• An average output power of 7.5 W with 58 ns pulse width at 1 kHz was obtained, corresponding to the slope efficiency of 21.7%.
• The maximum pulse energy of 7.5 mJ and the peak power of 125 KW were achieved.
• The beam quality factors were Mx2 = 2.24 and My2 = 1.63.

In this paper, a laser diode end pumped RbTiOPO4 (RTP) electro-optically Q-switched Tm:YAG slab laser was demonstrated. Stable Q-switched pulse with the shortest pulse width of 58 ns and an average output power of 7.5 W were realized at the repetition rate of 1 KHz, corresponding to the slope efficiency of 21.7%.