Laser power noise detection at the quantum-noise limit of 32A photocurrent

[摘要]：The power noise of a cw Nd:YAG laser system was measured at radio frequencies using the optical ac coupling technique. An additional mode cleaner in the setup allowed a high optical ac coupling amplification of 62.3. For the first time, to our knowledge, a sensitivity of 1.1 x 10(-10) Hz(-1/2) relative power noise was achieved corresponding to an equivalent detected photocurrent of 32A. High precision optics experiments can utilize this scheme to improve the sensitivity of their photodetectors. (C) 2011 Optical Society of America

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