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Miao Yu - One of the best experts on this subject based on the ideXlab platform.
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Miniature polymer Fabry-Perot Sensor with polymer dual optical cavities for simultaneous pressure and temperature measurements
Proceedings of SPIE, 2014Co-Authors: Hyungdae Bae, Miao YuAbstract:A novel miniature dual cavity Fabry–Perot Sensor is presented for simultaneous measurements of pressure and temperature in this work. Both of the pressure and the temperature sensing cavities are fabricated by using a single step UV molding process which is simple, cost-effective, and safe procedure. The pressure Sensor is composed of an UV molded cavity covered by a metal/polymer composite diaphragm for a high pressure sensitivity with a miniature Sensor size. The temperature Sensor is made of a short segment of UV curable polymer, which renders a high temperature sensitivity due to the material’s large thermal expansion. By exploiting the material characteristic of the polymer around 90% of size-reduction could be achieved with 88.5% of temperature sensitivity of the previously reported Sensor made of pure silica. The overall Sensor size is around 150 μm in diameter and 55 μm in length. Experimental studies show that the Sensor has a good linearity over a pressure range of 1.0 to 4.0 psi with a pressure sensitivity of 0.137 μm/psi at 28 °C, and a temperature range of 28.0 °C to 42.4 °C with a temperature sensitivity of 0.0026 μm/◦C. The Sensor can be applied to many biomedical applications that require pressure and temperature simultaneous measurements with minimum intrusiveness.
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hybrid miniature fabry perot Sensor with dual optical cavities for simultaneous pressure and temperature measurements
Journal of Lightwave Technology, 2014Co-Authors: Hyungdae Bae, David Yun, Haijun Liu, Douglas A Olson, Miao YuAbstract:We present a novel hybrid miniature dual-cavity Fabry-Perot Sensor for simultaneous pressure and temperature measurements. The pressure sensing cavity is composed of an UV-molded cavity covered by a metal/polymer composite diaphragm for achieving a high pressure sensitivity while maintaining a miniature Sensor size. Another intrinsic polymer/silica cavity is adopted for temperature sensing, which enables a high temperature sensitivity even with a short cavity length due to the large thermal expansion of the polymer. The Sensor is fabricated by using a unique UV molding process with simple and safe procedures. The overall Sensor size is around 150 μm in diameter and 343 μm in length. Experimental studies show that the Sensor exhibits a good linearity over a pressure range of 6.89 to 27.58 kPa with a pressure sensitivity of 0.0122 μm/kPa at 26 °C, and a temperature range of 26.0 °C to 50.0 °C with a temperature sensitivity of 0.0029 μm/°C. An optical signal processing method is developed to retrieve the two cavity length changes, which is demonstrated to have a better resolution and a faster speed than the conventional method. The Sensor is expected to benefit many fronts that require simultaneous pressure and temperature measurements with minimum intrusiveness, especially for biomedical applications.
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Hybrid Miniature Fabry–Perot Sensor with Dual Optical Cavities for Simultaneous Pressure and Temperature Measurements
Journal of Lightwave Technology, 2014Co-Authors: Hyungdae Bae, David Yun, Haijun Liu, Douglas A Olson, Miao YuAbstract:We present a novel hybrid miniature dual-cavity Fabry-Perot Sensor for simultaneous pressure and temperature measurements. The pressure sensing cavity is composed of an UV-molded cavity covered by a metal/polymer composite diaphragm for achieving a high pressure sensitivity while maintaining a miniature Sensor size. Another intrinsic polymer/silica cavity is adopted for temperature sensing, which enables a high temperature sensitivity even with a short cavity length due to the large thermal expansion of the polymer. The Sensor is fabricated by using a unique UV molding process with simple and safe procedures. The overall Sensor size is around 150 μm in diameter and 343 μm in length. Experimental studies show that the Sensor exhibits a good linearity over a pressure range of 6.89 to 27.58 kPa with a pressure sensitivity of 0.0122 μm/kPa at 26 °C, and a temperature range of 26.0 °C to 50.0 °C with a temperature sensitivity of 0.0029 μm/°C. An optical signal processing method is developed to retrieve the two cavity length changes, which is demonstrated to have a better resolution and a faster speed than the conventional method. The Sensor is expected to benefit many fronts that require simultaneous pressure and temperature measurements with minimum intrusiveness, especially for biomedical applications.
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Fiber optic Sensor system for structural acoustics control
Journal of the Acoustical Society of America, 2001Co-Authors: Miao Yu, Balakumar BalachandranAbstract:Recent work on acoustic measurements using a fiber‐tip‐based Fabry–Perot Sensor system is presented. A single Fabry–Perot Sensor using a path matched Mach–Zehnder interferometer is developed, and by taking advantage of an integrated optical circuit phase modulator, a digital demodulation scheme based on the phase stepping technique is developed. It has been determined that this system can be used to detect acoustic fields in the frequency range of 20 Hz–6 kHz with a sensitivity of 0.9 rad/Pa. This Sensor is designed to be used in a multiplexed architecture to provide inputs to a structural acoustic control system. A series of experiments are performed to investigate the possibility and potential use of this Sensor system for acoustic noise detection. In this study, initial test data from the prototype optical Sensor microphone are presented and the envisioned multiplexed Sensor scheme and control system are illustrated.
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Bragg-grating-based Fabry-Perot Sensor system for acoustic measurements
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, 1999Co-Authors: Christopher S. Baldwin, Steve Chen, James S. Sirkis, Miao Yu, Craig E. Miller, Balakumar BalachandranAbstract:We report recent work on acoustic measurements using a Bragg grating based Fabry-Perot Sensor system. A single Fabry-Perot Sensor using a path matched Michelson interferometer was developed, and a digital demodulation scheme based on the phase stepping technique was used to measure acoustic sound pressure from 100 Hz to 600 Hz. This Sensor is designed to work in a multiplexed architecture to provide inputs to a feed-forward adaptive control system. This control system will be used to actively control the sound pressure level within an enclosure. A series of experiments were performed to investigate the possibility and potential use of this Sensor system for acoustic noise detection. In this paper, we present initial test data from the prototype optical Sensor microphone. We also illustrate the envisioned multiplexed Sensor scheme and control system.
Juan Hernández-cordero - One of the best experts on this subject based on the ideXlab platform.
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Fiber optic Fabry-Perot Sensor for surface tension analysis.
Optics Express, 2014Co-Authors: Violeta A. Márquez-cruz, Juan Hernández-corderoAbstract:We demonstrate a new technique for analyzing surface tension of liquids. This is done upon examining the interference signals reflected from a remnant drop pending at the cleaved end of a single mode optical fiber. The resulting interference patterns are fitted to a multimirror Fabry-Perot model yielding information of the drop size. We show that the wetting process of the fiber plays an important role in drop formation; in particular, the drop size can be correlated to the surface tension of the liquid sample. The proposed configuration may render useful for liquids analysis using small sample volume.
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Surface tension measurements with a Fiber Optic Fabry-Perot Interferometer
Workshop on Specialty Optical Fibers and their Applications, 2013Co-Authors: Violeta A. Márquez-cruz, Juan Hernández-corderoAbstract:We evaluate the performance of a Fabry-Perot Sensor for measuring the surface tension of picoliter droplet samples formed on the tip of standard and etched single-mode optical fibers.
Gerard Franklyn Fernando - One of the best experts on this subject based on the ideXlab platform.
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Multiplexed optical fibre Fabry-Perot Sensors for strain metrology
Smart Materials and Structures, 1999Co-Authors: M. Singh, Christopher J. Tuck, Gerard Franklyn FernandoAbstract:This paper demonstrates the feasibility of multiplexing several optical fibre-based Fabry-Perot Sensors in series for strain metrology. White-light interferometry was employed using the laser-referenced Michelson interferometer of a standard Fourier-transform spectrometer as a receiving (interrogating) interferometer. The primary aim was to demonstrate that at least six fibre Fabry-Perot transducer interferometers (Sensors) can be multiplexed in series. A prerequisite for this Sensor system is that each Sensor has to have a unique optical cavity length within the multiplex. The resulting differing optical path differences at each fibre Fabry-Perot Sensor give rise to sharp correlation features (side bursts) at unique positions in the time domain as observed in the interferogram. An optical cavity length change due to an axial strain perturbation is observed as a change in the position in the time domain of the side-burst feature associated with the optical fibre Fabry-Perot Sensor. This paper demonstrates that multiplexed strain metrology in the quasi-static regime using optical fibre Fabry-Perot Sensors is possible with a measurement range of typically 0-4000 microstrain and a strain resolution of better than 10 microstrain.
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Multiplexed optical fiber Fabry-Perot Sensors for strain metrology
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, 1999Co-Authors: Christopher J. Tuck, Gerard Franklyn FernandoAbstract:The authors demonstrate that several optical fiber Fabry-Perot Sensors can be multiplexed in series for axial strain monitoring at each individual Sensor. White light interferometry was employed using the laser-referenced Michelson interferometer of a standard Fourier transform spectrometer as a receiving (interrogating) interferometer. The primary aim was to demonstrate that at least six fiber Fabry-Perot transducer interferometers (Sensors) can be multiplexed in series provided that each Sensor has a unique optical cavity length within the multiplex. The resulting differing optical path differences at each fiber Fabry-Perot Sensor give rise to sharp correlation features (side-bursts) at unique positions in the time domain as observed in the interferogram. An optical cavity length change due to an axial strain perturbation is observed as a change in the position in the time-domain of the side-burst feature associated with the fiber Fabry-Perot Sensor. This paper demonstrates that multiplexed strain metrology in the quasi-static regime using fiber Fabry-Perot Sensors is possible with a measurement range of typically 0 to 4000 microstrain and a strain resolution of better than 10 microstrain.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Hyungdae Bae - One of the best experts on this subject based on the ideXlab platform.
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Miniature polymer Fabry-Perot Sensor with polymer dual optical cavities for simultaneous pressure and temperature measurements
Proceedings of SPIE, 2014Co-Authors: Hyungdae Bae, Miao YuAbstract:A novel miniature dual cavity Fabry–Perot Sensor is presented for simultaneous measurements of pressure and temperature in this work. Both of the pressure and the temperature sensing cavities are fabricated by using a single step UV molding process which is simple, cost-effective, and safe procedure. The pressure Sensor is composed of an UV molded cavity covered by a metal/polymer composite diaphragm for a high pressure sensitivity with a miniature Sensor size. The temperature Sensor is made of a short segment of UV curable polymer, which renders a high temperature sensitivity due to the material’s large thermal expansion. By exploiting the material characteristic of the polymer around 90% of size-reduction could be achieved with 88.5% of temperature sensitivity of the previously reported Sensor made of pure silica. The overall Sensor size is around 150 μm in diameter and 55 μm in length. Experimental studies show that the Sensor has a good linearity over a pressure range of 1.0 to 4.0 psi with a pressure sensitivity of 0.137 μm/psi at 28 °C, and a temperature range of 28.0 °C to 42.4 °C with a temperature sensitivity of 0.0026 μm/◦C. The Sensor can be applied to many biomedical applications that require pressure and temperature simultaneous measurements with minimum intrusiveness.
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hybrid miniature fabry perot Sensor with dual optical cavities for simultaneous pressure and temperature measurements
Journal of Lightwave Technology, 2014Co-Authors: Hyungdae Bae, David Yun, Haijun Liu, Douglas A Olson, Miao YuAbstract:We present a novel hybrid miniature dual-cavity Fabry-Perot Sensor for simultaneous pressure and temperature measurements. The pressure sensing cavity is composed of an UV-molded cavity covered by a metal/polymer composite diaphragm for achieving a high pressure sensitivity while maintaining a miniature Sensor size. Another intrinsic polymer/silica cavity is adopted for temperature sensing, which enables a high temperature sensitivity even with a short cavity length due to the large thermal expansion of the polymer. The Sensor is fabricated by using a unique UV molding process with simple and safe procedures. The overall Sensor size is around 150 μm in diameter and 343 μm in length. Experimental studies show that the Sensor exhibits a good linearity over a pressure range of 6.89 to 27.58 kPa with a pressure sensitivity of 0.0122 μm/kPa at 26 °C, and a temperature range of 26.0 °C to 50.0 °C with a temperature sensitivity of 0.0029 μm/°C. An optical signal processing method is developed to retrieve the two cavity length changes, which is demonstrated to have a better resolution and a faster speed than the conventional method. The Sensor is expected to benefit many fronts that require simultaneous pressure and temperature measurements with minimum intrusiveness, especially for biomedical applications.
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Hybrid Miniature Fabry–Perot Sensor with Dual Optical Cavities for Simultaneous Pressure and Temperature Measurements
Journal of Lightwave Technology, 2014Co-Authors: Hyungdae Bae, David Yun, Haijun Liu, Douglas A Olson, Miao YuAbstract:We present a novel hybrid miniature dual-cavity Fabry-Perot Sensor for simultaneous pressure and temperature measurements. The pressure sensing cavity is composed of an UV-molded cavity covered by a metal/polymer composite diaphragm for achieving a high pressure sensitivity while maintaining a miniature Sensor size. Another intrinsic polymer/silica cavity is adopted for temperature sensing, which enables a high temperature sensitivity even with a short cavity length due to the large thermal expansion of the polymer. The Sensor is fabricated by using a unique UV molding process with simple and safe procedures. The overall Sensor size is around 150 μm in diameter and 343 μm in length. Experimental studies show that the Sensor exhibits a good linearity over a pressure range of 6.89 to 27.58 kPa with a pressure sensitivity of 0.0122 μm/kPa at 26 °C, and a temperature range of 26.0 °C to 50.0 °C with a temperature sensitivity of 0.0029 μm/°C. An optical signal processing method is developed to retrieve the two cavity length changes, which is demonstrated to have a better resolution and a faster speed than the conventional method. The Sensor is expected to benefit many fronts that require simultaneous pressure and temperature measurements with minimum intrusiveness, especially for biomedical applications.
Violeta A. Márquez-cruz - One of the best experts on this subject based on the ideXlab platform.
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Fiber optic Fabry-Perot Sensor for surface tension analysis.
Optics Express, 2014Co-Authors: Violeta A. Márquez-cruz, Juan Hernández-corderoAbstract:We demonstrate a new technique for analyzing surface tension of liquids. This is done upon examining the interference signals reflected from a remnant drop pending at the cleaved end of a single mode optical fiber. The resulting interference patterns are fitted to a multimirror Fabry-Perot model yielding information of the drop size. We show that the wetting process of the fiber plays an important role in drop formation; in particular, the drop size can be correlated to the surface tension of the liquid sample. The proposed configuration may render useful for liquids analysis using small sample volume.
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Surface tension measurements with a Fiber Optic Fabry-Perot Interferometer
Workshop on Specialty Optical Fibers and their Applications, 2013Co-Authors: Violeta A. Márquez-cruz, Juan Hernández-corderoAbstract:We evaluate the performance of a Fabry-Perot Sensor for measuring the surface tension of picoliter droplet samples formed on the tip of standard and etched single-mode optical fibers.