Počet záznamů: 1  

High-accuracy long distance measurements\nwith a mode-filtered frequency comb

  1. 1.
    SYSNO ASEP0483524
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevHigh-accuracy long distance measurements
    with a mode-filtered frequency comb
    Tvůrce(i) Lešundák, Adam (UPT-D) RID, ORCID
    Voigt, D. (NL)
    Číp, Ondřej (UPT-D) RID
    van der Berg, M. (NL)
    Celkový počet autorů4
    Zdroj.dok.Optics Express - ISSN 1094-4087
    Roč. 25, č. 26 (2017), s. 32570-32580
    Poč.str.11 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovameasurements ; filtered frequency comb
    Vědní obor RIVBH - Optika, masery a lasery
    Obor OECDOptics (including laser optics and quantum optics)
    CEPGB14-36681G GA ČR - Grantová agentura ČR
    LO1212 GA MŠk - Ministerstvo školství, mládeže a tělovýchovy
    ED0017/01/01 GA MŠk - Ministerstvo školství, mládeže a tělovýchovy
    Institucionální podporaUPT-D - RVO:68081731
    UT WOS000418893200034
    EID SCOPUS85039056793
    AnotaceHomodyne interferometry with a frequency comb as multi-wavelength source is a
    powerful method to measure long distances with high accuracy. The measurement principle
    requires that individual comb modes are spectrally resolved, making hundreds or thousands of
    accurately known wavelengths available for interferometry. For this reason the method cannot be applied directly to frequency combs with a low repetition rate (e.g. 100 MHz), since the modes are too close to be resolved. In this paper we use cavity mode filtering to increasing the pulse repetition rate of a comb and we apply the filtered comb for mode-resolved absolute distance measurement. Mode-filtering takes place with a single Fabry-Pérot cavity in a Vernier
    configuration, allowing to set mode spacings ranging from 10s of GHz to more than 100 GHz. Large mode-spacings significantly reduce the requirements on the resolution of the spectrometer. We demonstrate absolute long distance measurement with a mode-filtered frequency comb using
    a simple array spectrometer for mode-resolved detection. Here a 1 GHz comb is used, that is converted into a 56 GHz comb by mode-filtering. A trade-off between non-ambiguity range and spectral resolution needs to be made when choosing a filter ratio. The pulse-to-pulse distance
    after filtering is 5.3 mm in this case, so to overcome ambiguity a rough measurement with an accuracy of about 2.5 mm is required. We show that in comparison to a conventional counting interferometer an agreement within 0.5 .pí.m for distances up to 50 m is found. The presented
    method may enable the field application of low-repetition rate frequency comb lasers, like fiber lasers, for multi-wavelength homodyne interferometry. It relaxes the requirements on the spectral resolution, allowing for simple grating spectrometers as detector.
    PracovištěÚstav přístrojové techniky
    KontaktJan Slaměník, jan@isibrno.cz, Tel.: 541 514 205 ; Miluše Langová, langova@isibrno.cz
    Rok sběru2018