Open-Cavity Fabry-Perot Interferometer Based on Etched Side-Hole Fiber for Microfluidic Sensing
2015 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 27, no 17, 1813-1816 p.Article in journal (Refereed) Published
An open-cavity fiber-optic Fabry-Perot interferometer (FPI) is designed and demonstrated, with a particular consideration for microfluidic refractive index (RI) sensing. The FPI is composed of an etched side-hole fiber (SHF) sandwiched between two single-mode-fibers. Chemical etching method is used to open up the cavity in the SHF. Experimental results show that an optimal RI sensitivity of more than 1250 nm/RI can be achieved with an open-cavity length of 38 mu m for the microfluidic RI range from 1.3400 to 1.3470. In addition, the temperature sensitivity can reach an ultralow level of 1.1 pm/degrees C. The ease of fabrication, capability for in situ measurement, and excellent performance results suggest that the proposed FPI is highly promising as an inline refractometer for temperature-insensitive label-free microfluidic detection and sensing.
Place, publisher, year, edition, pages
2015. Vol. 27, no 17, 1813-1816 p.
Fabry-Perot interferometer, side-hole fiber, microfluidic sensing, temperature cross-sensitivity
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-172669DOI: 10.1109/LPT.2015.2443375ISI: 000358698200008ScopusID: 2-s2.0-84938690507OAI: oai:DiVA.org:kth-172669DiVA: diva2:850344
QC 201509012015-09-012015-08-272015-09-01Bibliographically approved