A quantum laser pointer

Date

2003

Authors

Treps, N.
Grosse, Nicolai
Bowen, Warwick P.
Fabre, Claude
Bachor, Hans
Lam, Ping Koy

Journal Title

Journal ISSN

Volume Title

Publisher

American Association for the Advancement of Science

Abstract

The measurement sensitivity of the pointing direction of a laser beam is ultimately limited by the quantum nature of light. To reduce this limit, we have experimentally produced a quantum laser pointer, a beam of light whose direction is measured with a precision greater than that possible for a usual laser beam. The laser pointer is generated by combining three different beams in three orthogonal transverse modes, two of them in a squeezed-vacuum state and one in an intense coherent field. The result provides a demonstration of multichannel spatial squeezing, along with its application to the improvement of beam positioning sensitivity and, more generally, to imaging.

Description

Keywords

Keywords: Imaging systems; Laser beams; Sensitivity analysis; Quantum laser pointers; Semiconductor lasers; laser; light; article; electric field; electromagnetic field; laser; light; measurement; noise; optics; priority journal; quantum theory

Citation

Source

Science

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1126/science.1086489

Restricted until

2037-12-31