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

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

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    39 Citations (Scopus)

    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 multiwavelength 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.

    Original languageEnglish
    Pages (from-to)27133-27146
    Number of pages14
    JournalOptics Express
    Volume20
    Issue number24
    DOIs
    Publication statusPublished - 19 Nov 2012

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