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Characterization of long period gratings manufactured with fiber optic fusion splicer for sensor development
(Planta Piloto de Ingeniería Química, 2020-12-24)
A Long Period Grating (LPG) is a structure inscribed in an optical fiber that is of great interest in the field of communications and sensors. At Centro de Investigaciones Ópticas (CIOp), an LPG manufacturing process was ...
Self-aligning CMOS photodetector sensor for application on an NDB-based optical encoder
(Optical Society of America, 2019-11)
In this work, a complementary metal–oxide–semiconductor (CMOS) photodetector specifically designed to be used in a non-diffracting-beam (NDB) optical encoder is introduced. The sensor is aimed to address the critical ...
Wideband quad optical sensor for high-speed sub-nanometer interferometry
(Optical Society of America, 2017-01)
This paper describes the design and performance of a low-noise and high-speed optical sensor that provides two output signals in quadrature from the simultaneous detection of four phase-shifted interferograms. The sensor ...
Optical Losses in Hybrid Microcavity Based in Porous Semiconductors and its Application as Optic Chemical Sensor
(Trans Tech Publications, 2019-02)
In this study the experimental and theoretical optical analysis of a hybrid microcavity (HM) based in porous silicon (PS) and nanoporous anodic alumina (NAA) are presented. The microcavity was centered in the visible region ...
Beam wandering statistics of twin thin laser beam propagation under generalized atmospheric conditions
(Optical Society of America, 2012-11-29)
Under the Geometrics Optics approximation is possible to estimate the covariance between the displacements of two thin beams after they have propagated through a turbulent medium. Previous works have concentrated in long ...
High-speed and high-resolution interrogation of FBG sensors using wavelength-to-time mapping and Gaussian filters
(Optical Society of America, 2019-12)
In this work we report a novel intensity-based technique for simultaneous high-speed and high-resolution interrogation of fiber Bragg grating (FBG) sensors. The method uses a couple of intensity Gaussian filters and the ...
Design of reflectivity-based surface plasmon resonance optical sensors for ultrasound detection
(Taylor & Francis Ltd, 2021-06)
Sensors based on surface plasmon resonance present attractive features for the detection of narrow acoustic pulses since they can behave as quasi-point detectors. In order to detect fast ultrasound pressure waves, the ...
A Molecular Imprinted Polymer as a Flow-Through Optical Sensor for Oxazepam
(Hindawi Publishing Corporation, 2018-04)
A flow-through optosensing system for oxazepam recognition with fluorescence detection was performed by means of a molecular imprinted polymer based on its acid hydrolysis product, 2-amino-5-chlorobenzophenone. The synthesis ...
Pattern matching oriented photodetector image sensor with programmable interconnection between pixels
(Society of Photo-Optical Instrumentation Engineers, 2021-12)
We present a photodetector sensor that is able to perform preprocessing operations on the focal plane. Each pixel can be connected with any of its neighbors in order to implement detection zones defined by software. The ...
Ultrasensitive detection of nitrogen oxides over a nanoporous membrane
(American Chemical Society, 2010-12)
A nitrogen oxide (NOx; x = 1, 2) optical sensor with an extremely low detection limit in the range of fractions of ppbV (0.3 ppbV for 20 s sample injection) is presented. Phenylenediamine derivatives are utilized as molecular ...