Photonic crystal fiber modal interferometer for biosensing applications

Author

Hu, Dora Juan Juan ; Lim, Jun Long ; Wang, Yixin ; Park, Mi Kyoung ; Kao, Linus Tzu-Hsiang

Author_Institution

RF & Opt. Dept., Agency for Sci., Technol. & Res. (A*STAR), Singapore, Singapore

fYear

2011

fDate

28-31 Oct. 2011

Firstpage

269

Lastpage

271

Abstract

We fabricate and demonstrate a refractometer based on photonic crystal fiber (PCF) modal interferometer. The streptavidin and biotin are used as analyte and receptor in the experiment. The fabrication of the sensor is carried out via micro-hole collapsing with straightforward fusion arc splicing technique. Both sides of a short length of PCF (~3 mm) are spliced to conventional single mode fibers (SMF). The voids of the PCF are completely collapsed in the splice region, acting as mode splitter and combiner for the PCF modal interferometer. The bulk liquid sensitivity is about 70.2 nm/RIU (refractive index unit) based on the linear curve fit for refractive index ranging from 1.33 to 1.35. The transmission spectrum of the biotin modified PCF modal interferometer exhibits 0.8 nm wavelength shift after streptavidin and biotin binding occurs.

Keywords

biosensors; fibre optic sensors; holey fibres; light interferometers; optical fibre fabrication; photonic crystals; proteins; refractive index; refractometers; splicing; PCF; SMF; biosensing; biotin; bulk liquid sensitivity; fusion arc splicing; microhole collapsing; mode combiner; mode splitter; photonic crystal fiber modal interferometer; refractometer; single mode fibers; streptavidin; Interference; Optical fiber sensors; Optical fibers; Optical interferometry; Photonic crystal fibers; Refractive index;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2011 IEEE

Conference_Location

Limerick

ISSN

1930-0395

Print_ISBN

978-1-4244-9290-9

Type

conf

DOI

10.1109/ICSENS.2011.6126927

Filename

6126927