Abstract
An efficient LED pumping module is explored for the demonstration of energy scaling of passively Q-switched output to millijoule high-pulse-energy level. For the free-running operation at fundamental wavelength, the highest optical conversion efficiency of 23.7% is reached. By using a Cr4+:YAG crystal as the saturable absorber, the passively Q-switched output energy is up to 14.5 mJ in a compact setup. The laser resonator is further optimized to shorten the output pulse width and to obtain better mode quality. The pulse width of the Q-switched emission is as short as 25 ns, and the peak power is up to 0.7 MW. With such a highly efficient configuration, the extracavity second-harmonic generation at 532 nm can be achieved with 4.5 mJ pulse energy. (C) 2019 Optical Society of America
Original language | English |
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Pages (from-to) | 3202-3205 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 44 |
Issue number | 13 |
DOIs | |
State | Published - 1 Jul 2019 |
Keywords
- LUMINESCENT CONCENTRATORS