Experimental demonstration of in-loop intracavity intensity-noise suppression

B. S. Sheard; M. B. Gray; B. J.J. Slagmolen; J. H. Chow; D. E. McClelland

doi:10.1109/JQE.2004.841611

Experimental demonstration of in-loop intracavity intensity-noise suppression

B. S. Sheard^*, M. B. Gray, B. J.J. Slagmolen, J. H. Chow, D. E. McClelland

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Experimental results for intracavity-laser intensity-noise suppression, or "squashing," manifested as reduced fluctuations on the transmitted field photodetector voltage are presented. It is experimentally demonstrated that a rigid optical cavity within the feedback loop is compatible with squashing. The observed closed loop detector noise floor is approximately 16 nV_rms/√Hz in the acoustic frequency range (∼100 Hz), well below the quantum limit due to shot noise of 148 nV_rms/√Hz. This corresponds to 19 dB of observed noise suppression below the quantum limit and is consistent with the measured disturbance suppression function of the feedback loop. We also present measurements demonstrating the orthogonality of the squashing and frequency-locking control loops.

Original language	English
Pages (from-to)	434-440
Number of pages	7
Journal	IEEE Journal of Quantum Electronics
Volume	41
Issue number	3
DOIs	https://doi.org/10.1109/JQE.2004.841611
Publication status	Published - Mar 2005

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title = "Experimental demonstration of in-loop intracavity intensity-noise suppression",

abstract = "Experimental results for intracavity-laser intensity-noise suppression, or {"}squashing,{"} manifested as reduced fluctuations on the transmitted field photodetector voltage are presented. It is experimentally demonstrated that a rigid optical cavity within the feedback loop is compatible with squashing. The observed closed loop detector noise floor is approximately 16 nVrms/√Hz in the acoustic frequency range (∼100 Hz), well below the quantum limit due to shot noise of 148 nVrms/√Hz. This corresponds to 19 dB of observed noise suppression below the quantum limit and is consistent with the measured disturbance suppression function of the feedback loop. We also present measurements demonstrating the orthogonality of the squashing and frequency-locking control loops.",

keywords = "Laser intensity-noise control, Nonclassical light, Quantum noise suppression",

author = "Sheard, {B. S.} and Gray, {M. B.} and Slagmolen, {B. J.J.} and Chow, {J. H.} and McClelland, {D. E.}",

year = "2005",

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AU - Sheard, B. S.

AU - Gray, M. B.

AU - Slagmolen, B. J.J.

AU - Chow, J. H.

AU - McClelland, D. E.

PY - 2005/3

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N2 - Experimental results for intracavity-laser intensity-noise suppression, or "squashing," manifested as reduced fluctuations on the transmitted field photodetector voltage are presented. It is experimentally demonstrated that a rigid optical cavity within the feedback loop is compatible with squashing. The observed closed loop detector noise floor is approximately 16 nVrms/√Hz in the acoustic frequency range (∼100 Hz), well below the quantum limit due to shot noise of 148 nVrms/√Hz. This corresponds to 19 dB of observed noise suppression below the quantum limit and is consistent with the measured disturbance suppression function of the feedback loop. We also present measurements demonstrating the orthogonality of the squashing and frequency-locking control loops.

AB - Experimental results for intracavity-laser intensity-noise suppression, or "squashing," manifested as reduced fluctuations on the transmitted field photodetector voltage are presented. It is experimentally demonstrated that a rigid optical cavity within the feedback loop is compatible with squashing. The observed closed loop detector noise floor is approximately 16 nVrms/√Hz in the acoustic frequency range (∼100 Hz), well below the quantum limit due to shot noise of 148 nVrms/√Hz. This corresponds to 19 dB of observed noise suppression below the quantum limit and is consistent with the measured disturbance suppression function of the feedback loop. We also present measurements demonstrating the orthogonality of the squashing and frequency-locking control loops.

KW - Laser intensity-noise control

KW - Nonclassical light

KW - Quantum noise suppression

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EP - 440

JO - IEEE Journal of Quantum Electronics

JF - IEEE Journal of Quantum Electronics

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Experimental demonstration of in-loop intracavity intensity-noise suppression

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