Page 1. 60 Rev Iberoam Micol 2005; 22: 60-61 Problemas clínicos en Micología Médica: problema nº ... more Page 1. 60 Rev Iberoam Micol 2005; 22: 60-61 Problemas clínicos en Micología Médica: problema nº 14 Ricardo Negroni, Alicia Arechavala y Gabriela López Daneri Unidad Micología, Hospital de Infecciosas Francisco Javier Muñiz, Buenos Aires, Argentina ...
Page 1. Refractive Index Sensing Characteristics of Alternate Au Ag Surface Gratings on Optical ... more Page 1. Refractive Index Sensing Characteristics of Alternate Au Ag Surface Gratings on Optical Waveguides Saurabh Mani Tripathi1, Arun Kumar1, Emmanuel Marin2 and Jean-Pierre Meunier2 1Physics Department, Indian ...
We measured the ability to report the tilt (direction of maximal slope) of a plane under monocula... more We measured the ability to report the tilt (direction of maximal slope) of a plane under monocular viewing conditions, from static depth cues (square grid patterns) and motion parallax (small rotations of the plane about a frontoparallel axis). These two cues were presented separately, or simultaneously. In the latter case they specified tilts that were either collinear (coherent case) or
Liquid hydrogen has been intensively used in aerospace applications for the past 40 years and is ... more Liquid hydrogen has been intensively used in aerospace applications for the past 40 years and is of great interest for future automotive applications. Following major explosive risks due to the use of hydrogen in air, several studies were carried out in order to develop optical fibre sensors for the detection of hydrogen leakage. This paper aims at the presentation of new hydrogen sensors based on the use of fibre Bragg gratings (FBG) and long period gratings (LPG) coated by palladium nanolayers. The sensing principle based on the palladium-hydrogen interaction is presented, as well as experimental results. It is shown that both techniques could be used for hydrogen sensing but with a sensitivity enhanced by a factor up to 500 when using a LPG sensor. FBG sensors appear to be pure strain sensors and LPG sensors are mainly based on the coupling between the cladding modes and evanescent or surface plasmon waves. Preliminary results obtained with an in-fibre Mach-Zehnder interferometer...
Specklegram in multimode fiber has successfully been used as a sensor for detecting mechanical di... more Specklegram in multimode fiber has successfully been used as a sensor for detecting mechanical disturbance. Speckles in a multimode pure silica grapefruit fiber are observed and compared to that of a step-index multimode fiber, showing different features between them. The sensitivities to external disturbance of two kinds of fiber were measured, based on single-multiple-single mode (SMS) fiber structure. Experimental results show that the grapefruit fiber shows higher sensitivity than does the step-index multimode fiber. The transmission spectrum of the grapefruit fiber was measured as well, showing some oscillation features that are significantly different from that of a step-index multimode fiber. The experiments may provide suggestions to understand the mechanisms of light propagation in grapefruit fibers.
Page 1. 60 Rev Iberoam Micol 2005; 22: 60-61 Problemas clínicos en Micología Médica: problema nº ... more Page 1. 60 Rev Iberoam Micol 2005; 22: 60-61 Problemas clínicos en Micología Médica: problema nº 14 Ricardo Negroni, Alicia Arechavala y Gabriela López Daneri Unidad Micología, Hospital de Infecciosas Francisco Javier Muñiz, Buenos Aires, Argentina ...
Page 1. Refractive Index Sensing Characteristics of Alternate Au Ag Surface Gratings on Optical ... more Page 1. Refractive Index Sensing Characteristics of Alternate Au Ag Surface Gratings on Optical Waveguides Saurabh Mani Tripathi1, Arun Kumar1, Emmanuel Marin2 and Jean-Pierre Meunier2 1Physics Department, Indian ...
We measured the ability to report the tilt (direction of maximal slope) of a plane under monocula... more We measured the ability to report the tilt (direction of maximal slope) of a plane under monocular viewing conditions, from static depth cues (square grid patterns) and motion parallax (small rotations of the plane about a frontoparallel axis). These two cues were presented separately, or simultaneously. In the latter case they specified tilts that were either collinear (coherent case) or
Liquid hydrogen has been intensively used in aerospace applications for the past 40 years and is ... more Liquid hydrogen has been intensively used in aerospace applications for the past 40 years and is of great interest for future automotive applications. Following major explosive risks due to the use of hydrogen in air, several studies were carried out in order to develop optical fibre sensors for the detection of hydrogen leakage. This paper aims at the presentation of new hydrogen sensors based on the use of fibre Bragg gratings (FBG) and long period gratings (LPG) coated by palladium nanolayers. The sensing principle based on the palladium-hydrogen interaction is presented, as well as experimental results. It is shown that both techniques could be used for hydrogen sensing but with a sensitivity enhanced by a factor up to 500 when using a LPG sensor. FBG sensors appear to be pure strain sensors and LPG sensors are mainly based on the coupling between the cladding modes and evanescent or surface plasmon waves. Preliminary results obtained with an in-fibre Mach-Zehnder interferometer...
Specklegram in multimode fiber has successfully been used as a sensor for detecting mechanical di... more Specklegram in multimode fiber has successfully been used as a sensor for detecting mechanical disturbance. Speckles in a multimode pure silica grapefruit fiber are observed and compared to that of a step-index multimode fiber, showing different features between them. The sensitivities to external disturbance of two kinds of fiber were measured, based on single-multiple-single mode (SMS) fiber structure. Experimental results show that the grapefruit fiber shows higher sensitivity than does the step-index multimode fiber. The transmission spectrum of the grapefruit fiber was measured as well, showing some oscillation features that are significantly different from that of a step-index multimode fiber. The experiments may provide suggestions to understand the mechanisms of light propagation in grapefruit fibers.
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