Transmission of red-laser radiation by using Bragg fibers with air cores

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F15%3A00241045" target="_blank" >RIV/68407700:21340/15:00241045 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985882:_____/15:00457525 RIV/68407700:21340/15:00241041

Výsledek na webu

<a href="http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2293114" target="_blank" >http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2293114</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2181971" target="_blank" >10.1117/12.2181971</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Transmission of red-laser radiation by using Bragg fibers with air cores

Popis výsledku v původním jazyce

This paper presents experimental results on transmission characteristics of a Bragg fibers with an air core at a wavelength of 632 nm. The results are compared with those determined with the same fiber but at a wavelength of 1064 nm. The cladding of the fiber consists of three pairs of Bragg layers. Each pair is composed of one layer with a high and one layer with a low refractive index. A diameter of the air core is of about 50 µm. A theoretical modelling of Bragg fibers was carried out from which band gap characteristics of the fiber were determined for the refractive-index contrast of the high- and low-index layers on a level of 0.03 and wavelengths around 632 nm. Preforms of the Bragg fiber in the form of tubes were prepared by the MCVD method. Germanium dioxide and phosphorous pentoxide were used as silica dopants for the high-index layers. The low-index layers were fabricated of silica slightly doped with phosphorous pentoxide. The last layer applied was the high-index one. Bragg fibers were drawn from the tubes under controlled temperatures around 2000 °C in order to obtain the fibers with designed dimensions of Bragg claddings and air cores. Results of characterization of prepared fibers with optical microscopy are presented in the paper. The transmission and attenuation of the fibers at 632 nm were measured with a pulse He-Ne laser as a light source. Spatial distributions of output beams from the fibers were also determined.

Název v anglickém jazyce

Transmission of red-laser radiation by using Bragg fibers with air cores

Popis výsledku anglicky

This paper presents experimental results on transmission characteristics of a Bragg fibers with an air core at a wavelength of 632 nm. The results are compared with those determined with the same fiber but at a wavelength of 1064 nm. The cladding of the fiber consists of three pairs of Bragg layers. Each pair is composed of one layer with a high and one layer with a low refractive index. A diameter of the air core is of about 50 µm. A theoretical modelling of Bragg fibers was carried out from which band gap characteristics of the fiber were determined for the refractive-index contrast of the high- and low-index layers on a level of 0.03 and wavelengths around 632 nm. Preforms of the Bragg fiber in the form of tubes were prepared by the MCVD method. Germanium dioxide and phosphorous pentoxide were used as silica dopants for the high-index layers. The low-index layers were fabricated of silica slightly doped with phosphorous pentoxide. The last layer applied was the high-index one. Bragg fibers were drawn from the tubes under controlled temperatures around 2000 °C in order to obtain the fibers with designed dimensions of Bragg claddings and air cores. Results of characterization of prepared fibers with optical microscopy are presented in the paper. The transmission and attenuation of the fibers at 632 nm were measured with a pulse He-Ne laser as a light source. Spatial distributions of output beams from the fibers were also determined.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

<a href="/cs/project/GAP102%2F12%2F2361" target="_blank" >GAP102/12/2361: Braggovská vlákna pro přenos vysokých energií laserů</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

Micro-structured and Specialty Optical Fibres IV

ISBN

9781628416282

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

7

Strana od-do

"95070Q-1"-"95070Q-7"

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Prague

Datum konání akce

13. 4. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000356703700022