Automation and dynamic characterization of light intensity with applications to tapered plastic optical fibre

Wong, Y.M.; Scully, Patricia; Kadim, H.J.; Alexiou, V.; Bartlett, Rebecca

doi:10.1088/1464-4258/5/4/354

Cited by 29 publications

(12 citation statements)

References 10 publications

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“…The final taper ratio R=ρ/ρ 0 , given by the ratio of final ρ and starting ρ 0 fiber diameter, is R=0.5. As can be observed, the tapering process requires few minutes and is much faster respect to chemical etching [23]. Typically, the tapers had losses less than 0.8 dB.…”

Section: Taper Fabricationmentioning

confidence: 92%

Polymer optical fiber tapers for biosensing applications

Gravina¹,

Bernini²

2009

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications IX

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We report the fabrication and the characterization of perfluorinated cladded multimode polymer optical fibers tapers. The fibers employed was a graded-index polymer optical fibers with core and cladding diameters of 62.5/90 and 120/160 and very low refractive index (nCore = 1.356, nCladding = 1.342). The tapers were fabricated using the heat-and-pull technique. This approach permits a good prediction of the taper shape and waist dimension. Despite to the fact that taper core is not in direct contact with the external medium, these fiber tapers can be used for sensing applications. In fact, some of the guided modes are no more confined in the core region but can still be guided by the fiber in the cladding region. Therefore, there is an evanescent wave in the external medium, related to bound and tunneling rays that can pass the taper region in the cladding. In particular, the very low refractive indexes of the core-cladding perfluorinated polymers permit a strong enhancement of the power fraction in the evanescent wave in aqueous environments (n=1.33). We carried out experiments evanescent wave spectroscopy by immerging the tapered fiber water containing a dissolved organic blue dye (Methylene blue) for a concentration range 5e-8-1e-5 M.

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Section: Taper Fabricationmentioning

confidence: 92%

Polymer optical fiber tapers for biosensing applications

Gravina¹,

Bernini²

2009

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications IX

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“…The tapered POF can be fabricated by the heat-drawing method [ 72 , 73 , 74 ] or the chemical etching method [ 75 , 76 ]. Different heating sources including the furnace [ 72 ], the solder gun [ 52 ], and the flame [ 73 ] were used to heat the POF.…”

Section: Different Types Of Intensity Modulation Pof-based Ri Sensorsmentioning

confidence: 99%

Intensity-Modulated Polymer Optical Fiber-Based Refractive Index Sensor: A Review

Teng

Min

Zheng

et al. 2021

Sensors

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The simple and highly sensitive measurement of the refractive index (RI) of liquids is critical for designing the optical instruments and important in biochemical sensing applications. Intensity modulation-based polymer optical fiber (POF) RI sensors have a lot of advantages including low cost, easy fabrication and operation, good flexibility, and working in the visible wavelength. In this review, recent developments of the intensity modulation POF-based RI sensors are summarized. The materials of the POF and the working principle of intensity modulation are introduced briefly. Moreover, the RI sensing performance of POF sensors with different structures including tapered, bent, and side-polished structures, among others, are presented in detail. Finally, the sensing performance for different structures of POF-based RI sensors are compared and discussed.

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“…A fibre based on RI is suitable for remote sensing because this fibre is small and immune to electromagnetic interference [59]. Many technologies that were used to create the optical fibre are aimed at changing the RI of the surrounding medium and a technique that was used is removing the cladding from the optical fibre [60,61]. The RI of liquid was measured by an optical fibre sensor based on measuring the input and output powers of the fibre [62,63].…”

Section: Refractive Index Optical Fibre Sensormentioning

confidence: 99%