Observation of Back-Action Noise Cancellation in Interferometric and Weak Force Measurements
- Laboratoire Kastler Brossel, ENS, UPMC, CNRS, case 74, 4 place Jussieu, 75005 Paris (France)
We experimentally demonstrate a cancellation of back-action noise in optical measurements. Back-action cancellation was first proposed within the framework of gravitational-wave detection by dual resonators as a way to drastically improve their sensitivity. We have developed an experiment based on a high-finesse Fabry-Perot cavity to study radiation-pressure effects in ultrasensitive displacement measurements. Using an intensity-modulated intracavity field to mimic the quantum radiation-pressure noise, we report the first observation of back-action cancellation due to a coherent mechanical response of the mirrors in the cavity to the radiation-pressure noise. We have observed a sensitivity improvement by a factor larger than 20 both in displacement and weak-force measurements.
- OSTI ID:
- 21028206
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.99.110801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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