We demonstrate a surface grating loaded VCSEL showing high power, good beam quality and stable single mode operation. In the structure, a single slow light mode propagating laterally along the long cavity of an oxide VCSEL can be selected thanks to the surface Bragg-grating. Experimental results of spectrum, L/I characteristics and beam quality with different device lengths are presented. A single mode power of over 80 mW is realized with a narrow diffraction-limited divergence angle of 0.15 •

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... or a VCSEL with an oxide aperture of 4 µm × 500 µm under CW operation. A higher single mode power is expected through extending the device length with the proven scaling law.