Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/98123
Title: A micro optofluidic lens with short focal length
Authors: Song, Chaolong
Nguyen, Nam-Trung
Tan, Say-Hwa
Asundi, Anand Krishna
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2009
Source: Song, C. L., Nguyen, N. T., Tan, S. H., & Asundi, A. K. (2009). A micro optofluidic lens with short focal length. Journal of Micromechanics and Microengineering, 19(8).
Series/Report no.: Journal of micromechanics and microengineering
Abstract: A micro optofluidic lens is formed by laminar streams of immiscible liquids with different refractive indices. This paper reports modelling and characterization for a new design of a micro optofluidic lens. The lens has a circular chamber allowing the formation of interfaces with a perfect arc shape. The inlet and the outlet of the lens chamber are placed with an offset to the chamber axis to achieve a radius of curvature smaller than the limiting chamber radius. A model mathematically predicts the relationship between the flow rate ratio and the curvature of the interface and the resulting focal length. The device was fabricated and tested with laser light guided by optical fibres. Experiments were carried out to verify the analytical model. Benzyl alcohol and ethylene glycol were used as optical media to form the lens. Due to the small radius of curvature, better focusing ability than the previous symmetric design was achieved. On-chip focusing with fibre-to-fibre transmission was demonstrated with this micro optofluidic lens.
URI: https://hdl.handle.net/10356/98123
http://hdl.handle.net/10220/7750
DOI: 10.1088/0960-1317/19/8/085012
Rights: © 2009 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Micromechanics and Microengineering, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: DOI:[http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1088/0960-1317/19/8/085012].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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