Tunable laser with linewidth suppression for optical frequency standards working in telecommunication bands

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F14%3A00434227" target="_blank" >RIV/68081731:_____/14:00434227 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1109/URSIGASS.2014.6929046" target="_blank" >http://dx.doi.org/10.1109/URSIGASS.2014.6929046</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/URSIGASS.2014.6929046" target="_blank" >10.1109/URSIGASS.2014.6929046</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tunable laser with linewidth suppression for optical frequency standards working in telecommunication bands

Popis výsledku v původním jazyce

In this work we present a laser source working in telecommunication wavelength band useful for construction of an optical frequency standard at 1540 nm. These standards are usually defined through a saturated absorption spectroscopy technique where acetylene gas is used as the absorption medium. Because the linewidth of absorption lines of acetylene are very narrow (several hundred kHz) it needs the laser with linewidth below the level of several kHz. We present a single-mode laser diode with a planar lightwave circuit (PLC) that includes a Bragg grating as the primary laser source. It has mode hop free tunable range up to 5 GHz of optical frequency at the operational wavelength 1540.577 nm. The linewidth of the laser is better than 3 kHz for short term period. But the laser absolute frequency is influenced by a flicker noise that could be suppressed. We used unbalanced Michelson fiber interferometer with 1 km long arm to suppress frequency noise of the laser. We provided the signal processing with PID servo loop with the laser current control. We suppressed the noise around the laser linewidth by −60 dB up to 33 kHz of Fourier frequency. The noise properties of the stabilized laser have promising stability for the optical frequency standard using an acetylene saturated absorption technique as a reference.

Název v anglickém jazyce

Tunable laser with linewidth suppression for optical frequency standards working in telecommunication bands

Popis výsledku anglicky

In this work we present a laser source working in telecommunication wavelength band useful for construction of an optical frequency standard at 1540 nm. These standards are usually defined through a saturated absorption spectroscopy technique where acetylene gas is used as the absorption medium. Because the linewidth of absorption lines of acetylene are very narrow (several hundred kHz) it needs the laser with linewidth below the level of several kHz. We present a single-mode laser diode with a planar lightwave circuit (PLC) that includes a Bragg grating as the primary laser source. It has mode hop free tunable range up to 5 GHz of optical frequency at the operational wavelength 1540.577 nm. The linewidth of the laser is better than 3 kHz for short term period. But the laser absolute frequency is influenced by a flicker noise that could be suppressed. We used unbalanced Michelson fiber interferometer with 1 km long arm to suppress frequency noise of the laser. We provided the signal processing with PID servo loop with the laser current control. We suppressed the noise around the laser linewidth by −60 dB up to 33 kHz of Fourier frequency. The noise properties of the stabilized laser have promising stability for the optical frequency standard using an acetylene saturated absorption technique as a reference.

Druh

D - Stať ve sborníku

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

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI (Proceedings IEEE)

ISBN

978-1-4673-5225-3

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Beijing

Datum konání akce

16. 8. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000366628700065