We demonstrated a nanosecond pulsed Cr:ZnSe laser with both wavelength tunability and burst pulse operation in the mid-infrared (IR) region. The burst pulse operation of the Cr:ZnSe laser was achieved using a pulse-on-demand Tm:YAG laser as a pump source. The number of pulse shots and the repetition rate in a packet were controlled. A tuning range of 2.32 to 2.56 μm was also achieved using a birefringent filter. Our results show that the pulse-on-demand Tm:YAG laser is an attractive pump source for the burst-pulse-operated Cr:ZnSe laser, which paves the way for various mid-IR laser applications.
We have demonstrated a pulse-on-demand operation in the mid-infrared region using a Cr:ZnSe laser pumped with a Qswitched Tm:YAG laser. The pulse-on-demand operation was accomplished by controlling the pump pulse train. In the burst pulse mode operation, we could control the number of pulses, the pulse interval, and each pulse height in a packet. In addition, the wavelength of the Cr:ZnSe laser can be tuned in the region of 2.3–2.6 μm. The total pulse energy of a single packet was a maximum of 0.2 mJ at 2.5 μm.
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.
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