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Issue 20, 2017
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Reproducible fiber optofluidic laser for disposable and array applications

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Abstract

Disposable sensors are widely used in biomedical detection due to their inherent safety, ease of use and low cost. An optofluidic laser is a sensitive bioassay platform; however, demonstrating its fabrication cheaply and reproducibly enough for disposable use has been challenging. Here, we report a low-cost, reproducible fiber optofluidic laser (FOFL) using a microstructured optical fiber (MOF). The MOF not only supports the whispering gallery modes for lasing but also serves as a microfluidic channel for sampling the liquid gain medium via capillary force. Because of the precise control of its geometry (δ < 0.4%) during the fiber-drawing process, good reproducibility in laser intensity (δ = 6.5%) was demonstrated by changing 10 sections of the MOF. The strong coupling between the in-fiber resonator and gain medium enables a low threshold of 3.2 μJ mm−2. The angular dependence of the laser emission was observed experimentally and analyzed with numerical simulations. An array of the FOFLs was also demonstrated. This technology has great potential for low-cost bioassay applications.

Graphical abstract: Reproducible fiber optofluidic laser for disposable and array applications

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Publication details

The article was received on 07 Jul 2017, accepted on 23 Aug 2017 and first published on 23 Aug 2017


Article type: Paper
DOI: 10.1039/C7LC00708F
Citation: Lab Chip, 2017,17, 3431-3436
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    Reproducible fiber optofluidic laser for disposable and array applications

    C. Gong, Y. Gong, Q. Chen, Y. Rao, G. Peng and X. Fan, Lab Chip, 2017, 17, 3431
    DOI: 10.1039/C7LC00708F

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