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Lin Y.-C.,Ming Chung University
Microwave and Optical Technology Letters | Year: 2014

A fiber-optic alcohol sensor based on surface plasmon resonance (SPR) technology is demonstrated. The sensing device is a multimode optical fiber in which half the core was polished away and a thin-film layer of gold was deposited. We theoretically and experimentally analyzed the SPR performance in alcohol sensing. The measured SPR spectrum shows good agreement with the simulated curve. The maximum SPR efficiency is about 24% at resonant wavelength 0.63 μm. In addition, a dynamic experiment was used to verify the good performance for our fiber-optic alcohol sensor in real-time detection. © 2014 Wiley Periodicals, Inc. Source


Lin Y.-C.,Ming Chung University
Microwave and Optical Technology Letters | Year: 2010

The insertion loss of lensed fiber collimator using gradient-index fiber of 140-μm diameter spliced to single-mode fiber is investigated. The power transmission equation is applied for theoretical analysis of the insertion loss between a lensed fiber pair. Both numerical and experimental data are presented in axial and lateral displacement. The optimum coupling position 600 μm for 0.29-pitch lensed fiber and the maximum working distance 1027 lm for 0.27-pitch lensed fiber are demonstrated. © 2010 Wiley Periodicals, Inc. Source


Lin Y.-C.,Ming Chung University
Microwave and Optical Technology Letters | Year: 2012

Because of the miniature trend in most fiber optic device, we propose and experimentally verify a coarse wavelength division multiplexing (CWDM) device with lensed fiber collimators. Our key idea is to use a tiny gradient index fiber lensed fiber less than the dimension of ø0.14 × L0.5 mm to replace the traditional gradient index lens collimator ø3.2 × L11 mm. The insertion loss of a pair of 0.27 pitch lensed fiber collimator is measured in both axial and lateral direction. Then, the thin film filter is sandwiched with the lensed fiber collimators to work as CWDM device. Our experimental result shows the center wavelength and bandwidth are 1549 and 17 nm, respectively. Furthermore, owing to the tiny size and low cost, the lensed fiber collimator will provide a wide utilization in the design of other passive devices and biosensors. © 2011 Wiley Periodicals, Inc. Source


Tsao Y.-C.,Tatung University | Lin Y.-C.,Ming Chung University | Tsai W.-H.,Tatung University | Wu M.-S.,Tatung University
Sensors and Actuators, A: Physical | Year: 2011

An optical fiber sensor based on the surface plasmon resonance (SPR) is proposed as a way to monitor the concentration of plasma deposited hydrophilic functional groups on material surfaces by the SPR dip shift in wavelength. The SPR optical fiber sensor was installed in the isopropanol (IPA) treatment system in order to measure the surface hydrophilicity of the deposited sample during IPA plasma treatment. The SPR dip shift in the spectrum was related to the water contact angle (WCA) for the same IPA plasma treatment conditions. Moreover, the compact size SPR fiber sensor was able to install in plasma treatment chamber and measure hydrophilicity in real time. © 2010 Published by Elsevier B.V. All rights reserved. Source


Lin Y.-C.,Ming Chung University
Microwave and Optical Technology Letters | Year: 2013

A refractive index optical fiber sensor based on surface plasmon resonance technology is demonstrated. The sensing device is a multimode optical fiber in which half of the core is polished away and a thin-film layer of gold is deposited. We measure the spectrum-difference variations and the resonance wavelength shifts for different refractive index solutions. In terms of the experimental data, the characteristics including resolution, sensitivity, and signal-to-noise ratio for the sensor are obtained. © 2012 Wiley Periodicals, Inc. Source

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