The Experts below are selected from a list of 30264 Experts worldwide ranked by ideXlab platform
Olivier Soppera - One of the best experts on this subject based on the ideXlab platform.
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Fabry Perot refractometer based on an end of fiber polymer tip
Optics Letters, 2009Co-Authors: Orlando Frazão, P Caldas, J L Santos, P V S Marques, Colette Turck, D J Lougnot, Olivier SopperaAbstract:A micrometric Fabry-Perot refractometer based on an end-of-fiber polymer tip is proposed. The fiber tip, with a length of 36 μm, was fabricated by self-guiding photopolymerization. The two-wave interferometric operation was achieved by combining the light waves generated at the interface between the single-mode fiber and the polymer tip, and at the fiber tip end (Fresnel reflection). The Fabry-Perot interferometer is coherence addressed and heterodyne interrogated, resulting into a liquid refractive index resolution of ≈7.5×10−4.
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Fabry Perot refractometer based on an end of fiber polymer tip
Optics Letters, 2009Co-Authors: Orlando Frazão, P Caldas, J L Santos, P V S Marques, Colette Turck, Daniel Lougno, Olivier SopperaAbstract:A micrometric Fabry-Perot refractometer based on an end-of-fiber polymer tip is proposed. The fiber tip, with a length of 36 mum, was fabricated by self-guiding photopolymerization. The two-wave interferometric operation was achieved by combining the light waves generated at the interface between the single-mode fiber and the polymer tip, and at the fiber tip end (Fresnel reflection). The Fabry-Perot interferometer is coherence addressed and heterodyne interrogated, resulting into a liquid refractive index resolution of approximately 7.5x10(-4).
Orlando Frazão - One of the best experts on this subject based on the ideXlab platform.
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experimental and numerical characterization of a hybrid Fabry Perot cavity for temperature sensing
Sensors, 2015Co-Authors: Aitor Lopezaldaba, A. M. R. Pinto, Hardy Baierl, Jose Manuel Baptista, Raphaël Jamier, José Luis Santos, M Lopezamo, Jean-louis Auguste, Orlando Frazão, Philippe RoyAbstract:A hybrid Fabry-Perot cavity sensing head based on a four-bridge microstructured fiber is characterized for temperature sensing. The characterization of this cavity is performed numerically and experimentally in the L-band. The sensing head output signal presents a linear variation with temperature changes, showing a sensitivity of 12.5 pm/°C. Moreover, this Fabry-Perot cavity exhibits good sensitivity to polarization changes and high stability over time.
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Fabry Perot refractometer based on an end of fiber polymer tip
Optics Letters, 2009Co-Authors: Orlando Frazão, P Caldas, J L Santos, P V S Marques, Colette Turck, D J Lougnot, Olivier SopperaAbstract:A micrometric Fabry-Perot refractometer based on an end-of-fiber polymer tip is proposed. The fiber tip, with a length of 36 μm, was fabricated by self-guiding photopolymerization. The two-wave interferometric operation was achieved by combining the light waves generated at the interface between the single-mode fiber and the polymer tip, and at the fiber tip end (Fresnel reflection). The Fabry-Perot interferometer is coherence addressed and heterodyne interrogated, resulting into a liquid refractive index resolution of ≈7.5×10−4.
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Fabry Perot refractometer based on an end of fiber polymer tip
Optics Letters, 2009Co-Authors: Orlando Frazão, P Caldas, J L Santos, P V S Marques, Colette Turck, Daniel Lougno, Olivier SopperaAbstract:A micrometric Fabry-Perot refractometer based on an end-of-fiber polymer tip is proposed. The fiber tip, with a length of 36 mum, was fabricated by self-guiding photopolymerization. The two-wave interferometric operation was achieved by combining the light waves generated at the interface between the single-mode fiber and the polymer tip, and at the fiber tip end (Fresnel reflection). The Fabry-Perot interferometer is coherence addressed and heterodyne interrogated, resulting into a liquid refractive index resolution of approximately 7.5x10(-4).
Xiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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plasmonic Fabry Perot nanocavity
Nano Letters, 2009Co-Authors: Volker J Sorger, Rupert F Oulton, Guy Bartal, Xiang ZhangAbstract:We experimentally demonstrate a novel, all-plasmonic nanoscopic cavity exhibiting Q-factors up to 200 at visible frequencies. The Fabry-Perot type resonator uses tall metallic fins that reflect up to 98% of incident surface plasmon to concentrate light within a subwavelength cavity mode. High aspect ratio metal fins, constructed using lithography and electroplating, reduce surface plasmon scattering out of the surface, while a short cavity length reduces the propagation loss. A simple Fabry-Perot cavity model adapted for surface plasmon dispersion and reflection describes the underlying physics of the nanocavities and the results agree well with Johnson's and Christie's permittivity data. The occurrence of an optimum wavelength for plasmon storage in these cavities allows us to clearly visualize the fundamental trade-off between propagation loss and the spatial extent of surface plasmon polaritons. The subwavelength optical mode area within these cavities enables the enhancement of weak optical processes such as spontaneous emission and nonlinear optics at nanoscale dimensions.
Takashi Kumagai - One of the best experts on this subject based on the ideXlab platform.
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near field manipulation in a scanning tunneling microscope junction with plasmonic Fabry Perot tips
Nano Letters, 2019Co-Authors: Hannes Bockmann, Melanie Muller, Adnan Hammud, Martin Wolf, Takashi KumagaiAbstract:Near-field manipulation in plasmonic nanocavities can provide various applications in nanoscale science and technology. In particular, a gap plasmon in a scanning tunneling microscope (STM) junction is of key interest to nanoscale imaging and spectroscopy. Here we show that spectral features of a plasmonic STM junction can be manipulated by nanofabrication of Au tips using focused ion beam. An exemplary Fabry–Perot type resonator of surface plasmons is demonstrated by producing the tip with a single groove on its shaft. Scanning tunneling luminescence spectra of the Fabry–Perot tips exhibit spectral modulation resulting from interference between localized and propagating surface plasmon modes. In addition, the quality factor of the plasmonic Fabry–Perot interference can be improved by optimizing the overall tip shape. Our approach paves the way for near-field imaging and spectroscopy with a high degree of accuracy.
Jie Huang - One of the best experts on this subject based on the ideXlab platform.
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a miniaturized optical fiber tip high temperature sensor based on concave shaped Fabry Perot cavity
IEEE Photonics Technology Letters, 2019Co-Authors: Chen Zhu, Roman Muhammad, Philip P. Wang, Bohong Zhang, Yiyang Zhuang, Jie HuangAbstract:We present a miniaturized optical fiber tip Fabry–Perot interferometer for high-temperature measurement based on a concave-shaped cavity. The fabrication process of the diaphragm-free Fabry–Perot cavity is quite simple, involving only two steps: fusion splicing and cleaving. By adjusting the arc power during fusion splicing, a concave-shaped structure is obtained, through which the light is coupled/split into the wall of the spliced hollow core fiber. By cleaving the end-face of the hollow-core fiber, a concave-shaped diaphragm-free Fabry–Perot interferometer is formed. The temperature response of the sensor was demonstrated, showing a high-temperature tolerance up to 1000 °C and a sensitivity of 0.01226 nm/°C. The proposed sensor, with all-silica-structure, high compactness, robustness, and ease of fabrication, could find wide applications in high-temperature harsh environments.
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simultaneous measurement of temperature and pressure with cascaded extrinsic Fabry Perot interferometer and intrinsic Fabry Perot interferometer sensors
Optical Engineering, 2014Co-Authors: Yinan Zhang, Xinwei Lan, Lei Yuan, Jie Huang, Hai XiaoAbstract:This paper presents an approach for simultaneous measurement of temperature and pressure using miniaturized fiber inline sensors. The approach utilizes the cascaded optical fiber inline intrinsic Fabry–Perot interferometer and extrinsic Fabry–Perot interferometer as temperature and pressure sensing elements, respectively. A CO2 laser was used to create a loss between them to balance their reflection power levels. The multiplexed signals were demodulated using a Fast Fourier transform-based wavelength tracking method. Experimental results showed that the sensing system could measure temperature and pressure unambiguously in a pressure range of 0 to 6.895×105 Pa and a temperature range from 20°C to 700°C.
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a coaxial cable Fabry Perot interferometer for sensing applications
Sensors, 2013Co-Authors: Jie Huang, Hai Xiao, Tao Wang, Lei Hua, Jun Fan, Ming LuoAbstract:This paper reports a novel coaxial cable Fabry-Perot interferometer for sensing applications. The sensor is fabricated by drilling two holes half-way into a coaxial cable. The device physics was described. The temperature and strain responses of the sensor were tested. The measurement error was calculated and analyzed.