Real-time displacement measurement immune from atmospheric parameters using optical frequency combs

Date

2012-11-19

Authors

Jian, Pu
Pinel, Olivier
Fabre, Claude
Lamine, Brahim
Treps, Nicolas

Journal Title

Journal ISSN

Volume Title

Publisher

Optical Society of America

Abstract

We propose a direct and real-time displacement measurement using an optical frequency comb, able to compensate optically for index of refraction variations due to atmospheric parameters. This scheme could be useful for applications requiring stringent precision over a long distance in air, a situation where dispersion becomes the main limitation. The key ingredient is the use of a mode-locked laser as a precise source for multi-wavelength interferometry in a homodyne detection scheme. By shaping temporally the local oscillator, one can directly access the desired parameter (distance variation) while being insensitive to fluctuations induced by parameters of the environment such as pressure, temperature, humidity and CO₂ content.

Description

Keywords

atmosphere, equipment design, interferometry, lasers, light, scattering, radiation

Citation

Source

Optics express

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1364/OE.20.027133

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