High-accuracy long distance measurementsnwith a mode-filtered frequency comb

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F17%3A00483524" target="_blank" >RIV/68081731:_____/17:00483524 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1364/OE.25.032570" target="_blank" >http://dx.doi.org/10.1364/OE.25.032570</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.25.032570" target="_blank" >10.1364/OE.25.032570</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-accuracy long distance measurementsnwith a mode-filtered frequency comb

Popis výsledku v původním jazyce

Homodyne interferometry with a frequency comb as multi-wavelength source is anpowerful method to measure long distances with high accuracy. The measurement principlenrequires that individual comb modes are spectrally resolved, making hundreds or thousands ofnaccurately 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 Verniernconfiguration, 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 usingna 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 distancenafter 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 presentednmethod 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.

Název v anglickém jazyce

High-accuracy long distance measurementsnwith a mode-filtered frequency comb

Popis výsledku anglicky

Homodyne interferometry with a frequency comb as multi-wavelength source is anpowerful method to measure long distances with high accuracy. The measurement principlenrequires that individual comb modes are spectrally resolved, making hundreds or thousands ofnaccurately 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 Verniernconfiguration, 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 usingna 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 distancenafter 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 presentednmethod 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optics Express

ISSN

1094-4087

e-ISSN

—

Svazek periodika

25

Číslo periodika v rámci svazku

26

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

32570-32580

Kód UT WoS článku

000418893200034

EID výsledku v databázi Scopus

2-s2.0-85039056793