A team of our researchers (Fangxin Yue, Venkatesan Jambunathan, Samuel Paul David, Martin Smrž, and Tomáš Mocek) together with scientists from Czech Technical University and Universitat Rovira i Virgili examined a topic of diode-pumped master oscillator power amplifier system based on cryogenically cooled Tm:Y2O3 transparent ceramics.
In their research, published in a paper in Optical Materials Express, the electro-optically switched master oscillator acted as a seed source and could be tuned from 1 to 100 Hz. A maximum pulse energy of 1.35 mJ with a pulse duration of 30 ns amounting to a peak power of 45 kW was obtained at 10 Hz. The power amplification via double-pass geometry achieved maximum single pulse energy of 2.94 mJ at 10 Hz with a pulse duration of 32 ns.
The achieved results showed the pulsed lasing potential of Tm:Y2O3 transparent ceramics at cryogenic temperatures. Thus, such material can be considered as an alternative gain medium for two-micron HAPP laser development in nano-second regime. Further work will be focused on four-pass geometry to increase the amplified output energy.
Click here to read the whole article.
