Abstract
Microchip lasers (and generally most micro-size lasers, like diode lasers or VCELS) being extremely compact and efficient sources of the coherent radiation, suffer from one drawback: the low spatial quality of the emitted beam. Only at low power emission regimes (close from the generation threshold) the microchip lasers can emit the beams and pulses of a reasonable spatial quality. Every attempt to increase the emission power, by increasing the pump power, or by increasing the pumping area, leads to the deterioration of the spatial quality of the beams, equivalently to large angular divergence, and results to lower brightness of the radiation.
© 2017 IEEE
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