Results 221 to 230 of about 22,708 (257)
Some of the next articles are maybe not open access.
Optical fiber laser sensor for refractive index measurement
2013 9th International Conference on Information, Communications & Signal Processing, 2013A refractive index (RI) sensor was proposed and demonstrated. The sensor head was manufactured by splicing a section of multimode fiber between two single-mode fiber segments (SMS). The SMS structure was used as a filter and inserted into an Erbium fiber ring to generate laser, which can improved the detection accuracy of the sensor.
Qingqiang Meng +3 more
openaire +1 more source
Highly sensitive refractive index sensors
SPIE Proceedings, 2007A chemical and biological sensor based on a free-space waveguide resonant grating optical filter has been developed. Different from the conventional surface plasmon resonance sensors and the conventional waveguide mode sensors, which require either prism coupling or grating coupling, the proposed free-space optical sensor device does not require ...
openaire +1 more source
Multimode interference tapered fiber refractive index sensors
Applied Optics, 2012Real-time monitoring of the fabrication process of tapering down a multimode-interference-based fiber structure is presented. The device is composed of a pure silica multimode fiber (MMF) with an initial 125 μm diameter spliced between two single-mode fibers. The process allows a thin MMF with adjustable parameters to obtain a high signal transmittance,
Claudecir R, Biazoli +4 more
openaire +2 more sources
Ultrasensitive photonic crystal fiber refractive index sensor
Optics Letters, 2009We introduce a microfluidic refractive index sensor based on a directional coupler architecture using solid-core photonic crystal fibers. The sensor achieves very high sensitivity by coupling the core mode to a mode in the adjacent fluid-filled waveguide that is beyond modal cutoff, and with strong field overlap.
Darran K C, Wu +2 more
openaire +2 more sources
Phase interrogation birefringent-refraction sensor for refractive index variation measurements
Sensors and Actuators A: Physical, 2017Abstract A birefringent-refraction (BR) sensor for measuring refractive indices of liquid solutions based on phase interrogation in a heterodyne interferometer is proposed. We theoretically investigate a comprehensive performance comparison between a surface plasmon resonance (SPR) sensor and the proposed BR sensor in terms of sensitivity and the ...
Ruey-Ching Twu, Chia-Wei Hsueh
openaire +1 more source
Refractive index sensor based on magnetoplasmonic crystals
Journal of Magnetism and Magnetic Materials, 2016Abstract A magneto-optical surface plasmon resonance (MOSPR) sensor based on a magnetoplasmonic crystal trilayer structure is presented. The sensitivity of the MOSPR sensor is studied as a function of ferromagnetic layer thickness and at the different modes of operation.
A.A. Grunin +3 more
openaire +1 more source
A Novel Intensity-Based Sensor Platform for Refractive Index Sensing
2019In the present investigation a new intensity-based sensor platform for refractive index sensing is presented. It is based on a special holder, a slab waveguide and two Plastic optical fibers (POFs). In particular, we present a comparison between two different configurations: the slab waveguide with and without a buffer layer.
Cennamo N., Mattiello F., Zeni L.
openaire +2 more sources
Sensor for refractive index variation of an optical surface using a high-refractive-index waveguide
Optical Engineering, 2007We describe the design of a waveguide Fabry-Perot optical sensor with high sensitivity to surface refractive index change. The optical thickness and field can be accommodated in a high-refractive-index waveguide, leading to a high sensitivity. Incorporating the resonance structure further enhances the sensitivity.
openaire +1 more source
Optical fibre-based refractive index measurement sensor
International Journal of Engineering Systems Modelling and Simulation, 2022Jayprabha Vishal Terdale, Amrit Ghosh
openaire +1 more source