Analysis of Surface Plasmons in the Optical Planar Waveguide with Spectral Detection

The paper deals with investigations concerning the plasmon resonance in an optical planar waveguide structure, applied in the construction of sensors with spectral detection. The surface plasmons in a multi-layer planar structure (with complex refractive indices) have been described, as well as the way of numerical solutions of physical equations describing the propagating electromagnetic field in such structures. The physical interpretation of obtained results has been presented, too

Analysis of Surface Plasmons in a Planar Waveguide System with Spectral Detection - Experimental Results

The paper presents the results of experimental investigations concerning the plasmon resonance in a planar waveguide structure applied in the construction of sensors with spectral detection

Analysis of Surface Plasmons in a Planar Waveguide System with Spectral Detection - Results of Model Investigations

The paper presents the results of numerical investigations of the phenomenon of plasmon resonance in a planar waveguide structure, applied in the construction of sensor with spectral detection

Spectropolarimetric analyses of optical single mode SU8 waveguide layers

The paper presents the principle of the operation of a spectropolarimetric interferometer. In a planar waveguide orthogonal modes of the TE and TM types can be excited for the entire visible light. During the propagation the difference of the phases between the modes was determined, which is the function of the length of the path of propagation, the difference of the effective refractive index (NTM-NTE) and the wavelength. At the output of this system the spectral distribution of intensity was recorded, the shape of which depends on the value of the refractive index of the cover of the waveguides

Hydrogen gas detection by means of a fiber optic interferometer sensor

We have developed a simple fiber optic Fabry-Perot interferometer (FPI) sensor that is used to detection and measure concentration of hydrogen gas in the air. The operating principle of the sensor is discussed in this paper, and it was noticed that the wavelength positions of the FPI reflectance peaks change with the concentration of hydrogen gas. The sensor has been successfully used to monitor concentration of H$_{2}$ in the air below Lower Explosion Limit (LEL). The sensor utilizes a layered sensing structure. This structure includes gasochromic titanium dioxide (TiO$_{2})$ sensing film. The optical H$_{2}$ gas sensor has a very short response time and a fast regeneration time at room temperature

Testing of Partial Discharges in Generator Coil Bars with the Help of Calibrated Acoustic Emission Method

Investigation results of acoustic emission signals coming from partial discharges within chosen generator coil bar, in relation to measurement results of apparent charge introduced by partial discharges sources, are presented in the article. Analysis is based on amplitude distributions calculated for acoustic emission signals, ordered at different measuring points for different values of the supply voltage. In order to assign acoustic emission signal to its advance degree a descriptor named by an acronym ADP (defined by authors) is calculated for each amplitude distribution. Descriptor families describing acoustic emission signals measured at particular measuring points (for different supply voltages) are presented in relation to apparent charge introduced by acoustic emission sources. These families concerning acoustic emission signals, measured at different measuring points for identical supply voltage, enable us to locate acoustic emission sources with maximum activity

Testing of Partial Discharges in Generator Coil Bars with the Help of Calibrated Acoustic Emission Method

Investigation results of acoustic emission signals coming from partial discharges within chosen generator coil bar, in relation to measurement results of apparent charge introduced by partial discharges sources, are presented in the article. Analysis is based on amplitude distributions calculated for acoustic emission signals, ordered at different measuring points for different values of the supply voltage. In order to assign acoustic emission signal to its advance degree a descriptor named by an acronym ADP (defined by authors) is calculated for each amplitude distribution. Descriptor families describing acoustic emission signals measured at particular measuring points (for different supply voltages) are presented in relation to apparent charge introduced by acoustic emission sources. These families concerning acoustic emission signals, measured at different measuring points for identical supply voltage, enable us to locate acoustic emission sources with maximum activity

Preliminary Research Concerning Measurements οf the POLVAD Blood Chamber Volume Based οn Helmholtz's Acoustic Resonator Principle

The article presents researches concerning a system for a possible blood volume measurements applied in POLVAD prosthesis. The proposed solution is based on the Helmholtz resonance principle. The article shows the state of art in blood volume sensors for using in the POLVAD prosthesis and introduces a newly proposed solution. The construction of the sensor and the results of static tests are presented. The work is summarized with future development plans

Pd/V2_{2}O5_{5} fiber optic hydrogen gas sensor*

The paper presents an optical-fiber hydrogen sensor. The sensor utilizes a layered sensing structure. This structure is a layered Fabry-Perot interferometer and includes gasochromic vanadium pentoxide (V$_{2}$O$_{5})$. A structure is made at the end of multi-mode optical fiber as a sensing element. The sensor permits to detect and to measure the concentration of hydrogen in a gaseous medium. The optical H$_{2}$ gas sensor has a very short response time and a fast regeneration time at room temperature

Researches on the Spectral Transmittance of Zinc Oxide ZnO Semiconductor Layers

The paper deals with investigations concerning a wide-band gap material, viz. zinc oxide ZnO. Special attention has been devoted to the determination of the spectral transmission of zinc oxide layers deposited on quartz substrates. These investigations have made it possible to determine the optical spectral range in which this material is transparent as well as the edges of absorption. The presented investigations are valuable particularly concerning the application of zinc oxide in optoelectronic and photonic structures as well as in systems of waveguides and sensor layers of integrated optics