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Optical Engineering

Rapid prototyping of a liquid-core waveguide in a microfluidic polydimethylsiloxane channel for optical sensing
Author(s): Fuchuan Song; Daniela Pagliero; Carlos A. Meriles; Sang-Woo Seo
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Paper Abstract

This paper presents a simple fabrication method for a liquid-core optofluidic waveguide and demonstrates efficient light delivery and collection using optical fibers pressure-sealed into a polydimethylsiloxane matrix. Total optical loss as small as 3 dB from an input optical fiber with a core diameter of 9 μm to an output optical fiber with a core diameter of 62.5 μm connected one to another via a 2 cm long liquid-core optofluidic channel is achieved. This strategy allows rapid prototyping of optofluidic waveguides without requiring expensive microfabrication facilities and is suitable for applications that require an efficient optical sensing in a small liquid sample. As a demonstration, we examine the optical Faraday rotation of a fluid sample and identify advantages and limitations by comparison to a macroscopic system of similar length.

Paper Details

Date Published: 24 April 2013
PDF: 6 pages
Opt. Eng. 52(4) 044404 doi: 10.1117/1.OE.52.4.044404
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Fuchuan Song, The City College of New York (United States)
Daniela Pagliero, The City College of New York (United States)
Carlos A. Meriles, The City College of New York (United States)
Sang-Woo Seo, The City College of New York (United States)

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