Measurement of refractive index profile of non-symmetric, complex silica preforms with high refractive index differences

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F16%3A00460289" target="_blank" >RIV/67985882:_____/16:00460289 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2227631" target="_blank" >http://dx.doi.org/10.1117/12.2227631</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2227631" target="_blank" >10.1117/12.2227631</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of refractive index profile of non-symmetric, complex silica preforms with high refractive index differences

Popis výsledku v původním jazyce

Refractive index profile measurement is a key instrument for characterization of optical properties of preforms,nwhich are used for drawing of high-quality optical fibers. Common industrial optical preform analyzers have beenndesigned for measurement of simple symmetric structures such as step-index or graded-index preforms with refractive index close to the silica (n=1.457 at 633 nm). However, these conditions are usually far from more complex structures used in fiber lasers or in fiber sensor area. Preforms for the drawing of advanced optical fibers, such as Bragg, microstructure or photonic crystal fibers, are usually constituted from stacks with non-symmetric internal structure or composed of alternating layers with high refractive index contrasts. In this paper we present comparison of refractive index profile measurements of simple as well as complex structures with high refractive index differences simulating the Bragg structures. Commercial Photon Kinetics 2600 preform analyzer was used for the refractive index profile measurements. A set of concentrically arranged silica tubes was welded to form a complex preforms. Free space between the tubes was filled by immersion with varying refractive indices to simulate the Bragg structure. Up to three tubes were used for the analysis and the refractive indices of immersion were changed from 1.4 to 1.5. When refractive index of immersion was independently measured the structure of preform was defined. Profiles of these “known structures were compared to measured data processed by originally proposed algorithm. The work provides an extension of issues of refractive index profile measurements in non-symmetric complex silica structures by a commercial preform analyzer and proposes more convenient methods of numeric data processing

Název v anglickém jazyce

Measurement of refractive index profile of non-symmetric, complex silica preforms with high refractive index differences

Popis výsledku anglicky

Refractive index profile measurement is a key instrument for characterization of optical properties of preforms,nwhich are used for drawing of high-quality optical fibers. Common industrial optical preform analyzers have beenndesigned for measurement of simple symmetric structures such as step-index or graded-index preforms with refractive index close to the silica (n=1.457 at 633 nm). However, these conditions are usually far from more complex structures used in fiber lasers or in fiber sensor area. Preforms for the drawing of advanced optical fibers, such as Bragg, microstructure or photonic crystal fibers, are usually constituted from stacks with non-symmetric internal structure or composed of alternating layers with high refractive index contrasts. In this paper we present comparison of refractive index profile measurements of simple as well as complex structures with high refractive index differences simulating the Bragg structures. Commercial Photon Kinetics 2600 preform analyzer was used for the refractive index profile measurements. A set of concentrically arranged silica tubes was welded to form a complex preforms. Free space between the tubes was filled by immersion with varying refractive indices to simulate the Bragg structure. Up to three tubes were used for the analysis and the refractive indices of immersion were changed from 1.4 to 1.5. When refractive index of immersion was independently measured the structure of preform was defined. Profiles of these “known structures were compared to measured data processed by originally proposed algorithm. The work provides an extension of issues of refractive index profile measurements in non-symmetric complex silica structures by a commercial preform analyzer and proposes more convenient methods of numeric data processing

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of SPIE

ISBN

—

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

8

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham, WA

Místo konání akce

Brussels

Datum konání akce

4. 4. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000389681800034