Integrated microfluidic flowmeter based on a micro-FBG inscribed in Co²âº-doped optical fiber.
Opt Lett
; 39(20): 5877-80, 2014 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-25361108
ABSTRACT
A novel microfluidic flowmeter integrated with microfiber Bragg grating (µFBG) is presented. Two glass capillaries and a short length of high-light-absorption Co²âº-doped optical fiber were stacked inside a larger outer capillary tube. The stack was then drawn into a tapered device. Two microchannels with the diameter of ~50 µm were formed inside the capillaries for flowing of microfluidics. An FBG was inscribed in the tapered Co²âº-doped fiber with waist diameter of ~70 µm, and acts as a flow-rate sensor. A pump laser with wavelength of 1480 nm was utilized to locally heat the µFBG, rendering the µFBG as miniature "hot-wire" flowmeter. The flow rate of the liquid in the microchannels is determined by the induced wavelength shift of the µFBG. The experimental results achieve a minimum detectable change of ~16 nL/s in flow rate, which is very promising in the use as part of biochips.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article