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Updated: May 29, 2026
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
Laser power noise detection at the quantum-noise limit of 32 A photocurrent
Patrick Kwee1, Benno Willke, Karsten Danzmann
1Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Hannover, Germany. patrick.kwee@aei.mpg.de
Abstract:
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 1.1×10⁻¹⁰ Hz(-1/2) relative power noise was achieved corresponding to an equivalent detected photocurrent of 32 A. High precision optics experiments can utilize this scheme to improve the sensitivity of their photodetectors.
