We demonstrate the operation of a monomode semiconductor laser with a relative intensity noise limited by the shot-noise floor, for a typical detected photocurrent of , over a large frequency range from . We achieve direct control of photon lifetime to turn an initially class-B laser into a relaxation-oscillation-free class-A one while preserving strict single-mode operation. Finally, we confirm experimentally that the laser operation in the desired class-A regime allows a dramatic filtering out of the relative intensity noise.
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