Quantum limits in the measurement of very small displacements in optical images

We consider the problem of the measurement of very small displacements in the transverse plane of an optical image with a split photodetector. We show that the standard quantum limit for such a measurement, which is equal to the diffraction limit divided by the square root of the number of photons u...

Full description

Saved in:
Bibliographic Details
Published in:Optics letters 2000-01, Vol.25 (1), p.76-78
Main Authors: Fabre, C, Fouet, J B, Maître, A
Format: Article
Language:English
Subjects:
Optics
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider the problem of the measurement of very small displacements in the transverse plane of an optical image with a split photodetector. We show that the standard quantum limit for such a measurement, which is equal to the diffraction limit divided by the square root of the number of photons used in the measurement, cannot be overcome by use of ordinary single-mode squeezed light. We give the form of possible multimode nonclassical states of light, enabling us to enhance by orders of magnitude the resolution of such a measurement beyond the standard quantum limit.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.25.000076