Characterization of Rectangular Glass Microcapillaries by Low-Coherence Reflectometry

Author

Carpignano, Francesca ; Rigamonti, Giulia ; Merlo, Sabina

Author_Institution

Dipt. di Ing. Ind. e dell´Inf., Univ. degli Studi di Pavia, Pavia, Italy

Volume

27

Issue

10

fYear

2015

fDate

May15, 15 2015

Firstpage

1064

Lastpage

1067

Abstract

We report the functionality of optical low-coherence reflectometry (OLCR) to characterize glass micro-capillaries with 50-μm deep rectangular cross section, in view of their application as microoptofluidic devices. We exploited infrared radiation generated by a tungsten lamp in a time-domain low-coherence interferometer based on a fiberoptic Michelson scheme. OLCR allowed us to easily detect the optical distance between in-depth interfaces of the capillary as well as the refractive index of ethylene glycol solutions in water at different concentrations, which were inserted into the channel by capillary action.

Keywords

Michelson interferometers; fibre optic sensors; infrared spectra; light coherence; light interferometry; micro-optics; optical glass; optical testing; organic compounds; reflectometry; refractive index; refractive index measurement; depth 50 mum; ethylene glycol solutions; fiberoptic Michelson scheme; infrared radiation generation; microoptofluidic devices; optical low-coherence reflectometry; rectangular glass microcapillary characterization; refractive index; time-domain low-coherence interferometer; tungsten lamp; water; Glass; Optical fibers; Optical interferometry; Optical reflection; Optical refraction; Optical variables control; Distance measurements; Glass rectangular micro-capillary; Infrared radiation; Optical low-coherence reflectometry; Refractive index measurements; distance measurements; glass rectangular micro-capillary; infrared radiation; refractive index measurements;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2407271

Filename

7047770