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Schematic of lens-less edge pump microchip laser. One of diodes shows the specific structure including heat-sink and Au-wire, the rest of them show the simplified view.
Simulation of absorbed power density D (W/mm3) distribution in 3.8 mm-diameter core area pumping by (a) 1, (b) 3, (c) 9, and (d) 27 diodes. The cross-section pictures show the numerical D value along X axis and Y axis.
Adjusted-R2 as a function of the number of diodes depends on different absorption coefficient .
Front view of microchip laser pumped by 9 diode chips without lens.
Fluorescence images taken by CCD camera, pumped by (a) 3 diode chips and (b) 9 diode chips.
Gaussian shape output power (the black squares) as a function of incident pump power. M 2 factor (the red circles), when output power was 0.32 W, 3.5 W, 11 W, 19.3 W, and 27.2 W. 2D and 3D beam patterns when the maximum output is 27.2 W.
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