Enhanced novel fiber-optic sensor for efficient fluorescence collection

Yasser Chiniforooshan; Jianjun Ma; Wojtek J. Bock

doi:10.1117/12.976883

7 November 2012 Enhanced novel fiber-optic sensor for efficient fluorescence collection

Yasser Chiniforooshan, Jianjun Ma, Wojtek J. Bock

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84216P (2012) https://doi.org/10.1117/12.976883
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

In this article the enhancement of the novel fiber-optic fluorescent sensor is demonstrated. The novel sensor that was developed by our group is based on the collection of the fluorescence from the sidewall of the multimode optical fiber which is partly de-cladded and covered by the sample under the test (SUT). The most part of the fluorescent intensity is carried by the leaky rays which are inaccessible in traditional evanescent-wave fluorescence fiber sensors. In our previous structure, some part of a refracting power is collected in the de-cladded segment and used to excite the lower order lossless modes in the cladded part by an end-face mode-mixer. In the enhanced type of our sensor we discovered that the mode-mixer on the side-wall, rather than on the end-face, is more efficient. The fluorescence efficiency increased in this type of enhanced sensor by about 88%. Moreover, the capability of multiplexing of the different SUT on one fiber is a promising advantage of this architecture with a view to develop the multi-channel chemical detection system with inexpensive simple fiber-optic.

Citation Download Citation

Yasser Chiniforooshan, Jianjun Ma, and Wojtek J. Bock "Enhanced novel fiber-optic sensor for efficient fluorescence collection", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216P (7 November 2012); https://doi.org/10.1117/12.976883

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