2 µm Tm:YAG laser with pulse-on-demand operation

We have demonstrated pulse-on-demand operation of a 2 μm AO Q-switched Tm: YAG laser. Burst pulse operation, the number of pulses in a packet, and pulse interval can be controlled by RF power modulation and pump control. The burst packet included up to 10 pulses at a pulse interval of 138 s. The pulse energy and pulse width of a single pulse in the packet were ~0.7 mJ and 70–150 ns, respectively. In addition, we have demonstrated that the envelope of the burst pulse train could be designed as required.