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Diode-pumped neodymium lasers repetitively Q-switched by Cr4+ :YAG solid-state saturable absorbers

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6 Author(s)
Agnesi, A. ; Dipartimento di Elettronica, Pavia Univ., Italy ; Dell'Acqua, S. ; Morello, C. ; Piccinno, G.
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We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr4+:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was ≈200 μJ in single TEM00, 17 ns pulses at 6 kHz, whereas a maximum average power of ≈2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO4 laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:3 ,  Issue: 1 )