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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 11 — Jun. 2, 2014
  • pp: 12915–12923

Optically trapped mirror for reaching the standard quantum limit

Nobuyuki Matsumoto, Yuta Michimura, Yoichi Aso, and Kimio Tsubono  »View Author Affiliations

Optics Express, Vol. 22, Issue 11, pp. 12915-12923 (2014)

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The preparation of a mechanical oscillator driven by quantum back-action is a fundamental requirement to reach the standard quantum limit (SQL) for force measurement, in optomechanical systems. However, thermal fluctuating force generally dominates a disturbance on the oscillator. In the macroscopic scale, an optical linear cavity including a suspended mirror has been used for the weak force measurement, such as gravitational-wave detectors. This configuration has the advantages of reducing the dissipation of the pendulum (i.e., suspension thermal noise) due to a gravitational dilution by using a thin wire, and of increasing the circulating laser power. However, the use of the thin wire is weak for an optical torsional anti-spring effect in the cavity, due to the low mechanical restoring force of the wire. Thus, there is the trade-off between the stability of the system and the sensitivity. Here, we describe using a triangular optical cavity to overcome this limitation for reaching the SQL. The triangular cavity can provide a sensitive and stable system, because it can optically trap the mirror’s motion of the yaw, through an optical positive torsional spring effect. To show this, we demonstrate a measurement of the torsional spring effect caused by radiation pressure forces.

© 2014 Optical Society of America

OCIS Codes
(270.5570) Quantum optics : Quantum detectors
(270.5585) Quantum optics : Quantum information and processing
(120.4880) Instrumentation, measurement, and metrology : Optomechanics

ToC Category:

Original Manuscript: April 8, 2014
Revised Manuscript: May 9, 2014
Manuscript Accepted: May 12, 2014
Published: May 20, 2014

Nobuyuki Matsumoto, Yuta Michimura, Yoichi Aso, and Kimio Tsubono, "Optically trapped mirror for reaching the standard quantum limit," Opt. Express 22, 12915-12923 (2014)

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