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Length measurement in absolute scale via low-dispersion optical cavity
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SYSNO ASEP 0468528 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Length measurement in absolute scale via low-dispersion optical cavity Tvůrce(i) Pravdová, Lenka (UPT-D) RID, ORCID, SAI
Lešundák, Adam (UPT-D) RID, ORCID, SAI
Šmíd, Radek (UPT-D) RID, SAI
Hrabina, Jan (UPT-D) RID, ORCID, SAI
Řeřucha, Šimon (UPT-D) RID, ORCID, SAI
Číp, Ondřej (UPT-D) RID, SAI, ORCIDCelkový počet autorů 6 Číslo článku 101420T Zdroj.dok. 20th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics (Proceedings of SPIE 10142). - Bellingham : SPIE, 2016 - ISSN 0277-786X Rozsah stran s. 1-5 Poč.str. 5 s. Forma vydání Online - E Akce Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics /20./ Datum konání 05.09.2016 - 09.09.2016 Místo konání Jasná Země SK - Slovensko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova absolute length measurement ; dispersion ; optical frequency comb ; length metrology ; Fabry-Perot ; resonator Vědní obor RIV BH - Optika, masery a lasery CEP GB14-36681G GA ČR - Grantová agentura ČR LO1212 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy ED0017/01/01 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UPT-D - RVO:68081731 UT WOS 000393152700028 EID SCOPUS 85011660644 DOI https://doi.org/10.1117/12.2264452 Anotace We report on the length measuring instrument with the absolute scale that was based on the combination of an optical frequency comb and a passive optical cavity. The time spacing of short femtosecond pulses, generated by the optical frequency comb, is optically phase locked onto the cavity free spectral range with a derivative spectroscopy technique so that the value of the repetition frequency of the femtosecond laser is tied to and determines the measured displacement. The instantaneous value of the femtosecond pulse train frequency is counted by a frequency counter. This counted value corresponds to the length given by the spacing between the two mirrors of the passive cavity. The phase lock between the femtosecond pulsed beam and the passive cavity is possible due to the low-dispersion of the cavity mirrors, where the silver coating on the mirrors was used to provide the low dispersion for the broadband radiation of the comb. Every reflection on the output mirror feeds a portion of the beam back to the cavity so that the output beam is a result of multiple interfering components. The parameters of the output beam are given not only by the parameters of the mirrors but mainly by the absolute distance between the mirror surfaces. Thus, one cavity mirror can be considered as the reference starting point of the distance to be measured and the other mirror is the measuring probe surveying the unknown distance. The measuring mirror of the experimental setup of the low-dispersion cavity is mounted on a piezoelectric actuator which provides small changes in the cavity length we used to test the length measurement method. For the verification of the measurement accuracy a reference incremental interferometer was integrated into our system so that the displacement of the piezoelectric actuator could be obtained with both measuring methods simultaneously. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2017 Elektronická adresa http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2595365
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