Kazimierz Jedrzejewski - Profile on Academia.edu (original) (raw)
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Papers by Kazimierz Jedrzejewski
Photonics Letters of Poland, 2010
Optical Fibers and Their Applications VI, 1999
ABSTRACT
Double-clad photonic crystal fibre for laser applications
SPIE Proceedings, 2007
ABSTRACT Double-clad photonic crystal fibre structure for laser applications is demonstrated. The... more ABSTRACT Double-clad photonic crystal fibre structure for laser applications is demonstrated. The double-clad structure of the fibre has the air-cladding with glass bridges of waists less than 500nm. The fibre was produced with phosphate glass and the core region was doped with ytterbium. The fibre was investigated and we found it to be monomode for generation wavelength of 1008nm. Whole fibre producing process including doped and undoped glass manufacturing and fibre drawing was held in Institute of Electronic Materials Technology.
Sensor monitoring system with embedded FBGs
2014 16th International Conference on Transparent Optical Networks (ICTON), 2014
In this paper, we propose a simple monitoring system with the use of specially fabricated Fibre B... more In this paper, we propose a simple monitoring system with the use of specially fabricated Fibre Bragg Gratings (FBGs) and Optical Power Meter (OPM). The main idea bases on stable and easy to build system for environmental parameters measurements using in-line fused FBGs. Here are presented the results of temperature measurement monitoring system. The broader aim was to create sensor network, which would allow to detect changes of outer environmental parameters in easy and stable way for indicated locations. Proposed monitoring system was subject to wide range temperature variations.
[
Comparative Radiation Investigations of Optical Fibers. [POROWNAWCZE BADANIA RADIACYJNE SWIATLOWODOW
ABSTRACT
Numerical analysis of double chirp effect in tapered and linearly chirped fiber Bragg gratings
Applied Optics, 2016
In this paper, a theoretical analysis of recently developed tapered chirped fiber Bragg gratings ... more In this paper, a theoretical analysis of recently developed tapered chirped fiber Bragg gratings (TCFBG) written in co-directional and counter-directional configurations is presented. In particular, the effects of the synthesis of chirps resulting from both a fused taper profile and a linearly chirped fringe pattern of the induced refractive index changes within the fiber core are extensively examined. For this purpose, a numerical model based on the transfer matrix method (TMM) and the coupled mode theory (CMT) was developed for such a grating. The impact of TCFBG parameters, such as grating length and steepness of the taper transition, as well as the effect of the fringe pattern chirp rate on the spectral properties of the resulting gratings, are presented. Results show that, by using the appropriate design process, TCFBGs with reduced or enhanced resulting chirp, and thus with widely tailored spectral responses, can be easily achieved. In turn, it reveals a great potential application of such structures. The presented numerical approach provides an excellent tool for TCFBG design.
Wideband tapered directional coupler
Spie Proceedings Series, 1997
ABSTRACT
[
Comparative Radiation Investigations of Optical Fibers. [POROWNAWCZE BADANIA RADIACYJNE SWIATLOWODOW
ABSTRACT
Badania radiacyjne swiatlowod�w
Thermal and aging tests of fiber Bragg gratings as wavelength standards
Proceedings of Spie the International Society For Optical Engineering, Sep 23, 2005
ABSTRACT In this paper we present results of research on fiber Bragg gratings (FBGs) fabricated o... more ABSTRACT In this paper we present results of research on fiber Bragg gratings (FBGs) fabricated on hydrogen-loaded fibers using scanning phase mask method. The influence of temperature on Bragg wavelength, reflectivity and FWHM for various exposure time and hydrogenation time was investigated. We also have carried out aging tests of fiber Bragg gratings using climatic chamber. Results of these tests can be useful for optimization of FBGs fabrication. We have estimated of fiber Bragg gratings usability as wavelength standards for calibration of fiber optics devices especially optical spectrum analyzers (OSA).
Properties of Home-Made MCVD, PCS and DC/TC Optical Fibres in Radiation Environments
ABSTRACT
Broadband light source for the third transmission window
Journal of Alloys and Compounds, 2000
31 31 31 Great progress has been observed in recent years in the development of Nd-, Er-and Pr-do... more 31 31 31 Great progress has been observed in recent years in the development of Nd-, Er-and Pr-doped fluoride glasses appropriate for fibre lasers, upconversion laser systems, and amplifiers operating at 1064 and 1550 nm. A series of fluoride glasses doped with different 31 31 31 concentrations of Nd , Er and Pr ions have been prepared. The room temperature fluorescence spectra of these glasses under various excitation wavelengths have been investigated. Fluorescence lifetimes have been measured for the most interesting transitions.
Optical fibre technology by triple and quadruple crucible methods
ABSTRACT
Technologia biernych podzespołów światłowodowych
Elektronika Konstrukcje Technologie Zastosowania, 2001
Investigation of Mach-Zehnder effects in tapered fibre long period gratings
Conference on Lasers and Electro-Optics Europe - Technical Digest, 2005
A new fibre Mach-Zehnder type based on a single LPG written in a biconical fibre taper is present... more A new fibre Mach-Zehnder type based on a single LPG written in a biconical fibre taper is presented alongside a theoretical model supporting the observed effect
Electronics Letters, 2005
A single long-period fibre grating was written in a biconical fibre taper made from standard comm... more A single long-period fibre grating was written in a biconical fibre taper made from standard communications step-index optical fibre, resulting in an interferometric fibre sensor device that provided a resolution of 1 Â 10 À4 for refractive indices in the range of 1.30 to 1.34, suggesting that these devices may be suitable for use with aqueous solutions.
Yb3+ sensitised Er3+ doped silica optical fibre with ultrahigh transfer efficiency and gain
Electronics Letters, 1991
ABSTRACT
Utilization of glass optical waveguides in electron and gamma ray dosimetry
Laboratory of Fundamentals of Optoelectronics and Optoelectronics Measurements
Photonics Letters of Poland, 2010
Optical Fibers and Their Applications VI, 1999
ABSTRACT
Double-clad photonic crystal fibre for laser applications
SPIE Proceedings, 2007
ABSTRACT Double-clad photonic crystal fibre structure for laser applications is demonstrated. The... more ABSTRACT Double-clad photonic crystal fibre structure for laser applications is demonstrated. The double-clad structure of the fibre has the air-cladding with glass bridges of waists less than 500nm. The fibre was produced with phosphate glass and the core region was doped with ytterbium. The fibre was investigated and we found it to be monomode for generation wavelength of 1008nm. Whole fibre producing process including doped and undoped glass manufacturing and fibre drawing was held in Institute of Electronic Materials Technology.
Sensor monitoring system with embedded FBGs
2014 16th International Conference on Transparent Optical Networks (ICTON), 2014
In this paper, we propose a simple monitoring system with the use of specially fabricated Fibre B... more In this paper, we propose a simple monitoring system with the use of specially fabricated Fibre Bragg Gratings (FBGs) and Optical Power Meter (OPM). The main idea bases on stable and easy to build system for environmental parameters measurements using in-line fused FBGs. Here are presented the results of temperature measurement monitoring system. The broader aim was to create sensor network, which would allow to detect changes of outer environmental parameters in easy and stable way for indicated locations. Proposed monitoring system was subject to wide range temperature variations.
[
Comparative Radiation Investigations of Optical Fibers. [POROWNAWCZE BADANIA RADIACYJNE SWIATLOWODOW
ABSTRACT
Numerical analysis of double chirp effect in tapered and linearly chirped fiber Bragg gratings
Applied Optics, 2016
In this paper, a theoretical analysis of recently developed tapered chirped fiber Bragg gratings ... more In this paper, a theoretical analysis of recently developed tapered chirped fiber Bragg gratings (TCFBG) written in co-directional and counter-directional configurations is presented. In particular, the effects of the synthesis of chirps resulting from both a fused taper profile and a linearly chirped fringe pattern of the induced refractive index changes within the fiber core are extensively examined. For this purpose, a numerical model based on the transfer matrix method (TMM) and the coupled mode theory (CMT) was developed for such a grating. The impact of TCFBG parameters, such as grating length and steepness of the taper transition, as well as the effect of the fringe pattern chirp rate on the spectral properties of the resulting gratings, are presented. Results show that, by using the appropriate design process, TCFBGs with reduced or enhanced resulting chirp, and thus with widely tailored spectral responses, can be easily achieved. In turn, it reveals a great potential application of such structures. The presented numerical approach provides an excellent tool for TCFBG design.
Wideband tapered directional coupler
Spie Proceedings Series, 1997
ABSTRACT
[
Comparative Radiation Investigations of Optical Fibers. [POROWNAWCZE BADANIA RADIACYJNE SWIATLOWODOW
ABSTRACT
Badania radiacyjne swiatlowod�w
Thermal and aging tests of fiber Bragg gratings as wavelength standards
Proceedings of Spie the International Society For Optical Engineering, Sep 23, 2005
ABSTRACT In this paper we present results of research on fiber Bragg gratings (FBGs) fabricated o... more ABSTRACT In this paper we present results of research on fiber Bragg gratings (FBGs) fabricated on hydrogen-loaded fibers using scanning phase mask method. The influence of temperature on Bragg wavelength, reflectivity and FWHM for various exposure time and hydrogenation time was investigated. We also have carried out aging tests of fiber Bragg gratings using climatic chamber. Results of these tests can be useful for optimization of FBGs fabrication. We have estimated of fiber Bragg gratings usability as wavelength standards for calibration of fiber optics devices especially optical spectrum analyzers (OSA).
Properties of Home-Made MCVD, PCS and DC/TC Optical Fibres in Radiation Environments
ABSTRACT
Broadband light source for the third transmission window
Journal of Alloys and Compounds, 2000
31 31 31 Great progress has been observed in recent years in the development of Nd-, Er-and Pr-do... more 31 31 31 Great progress has been observed in recent years in the development of Nd-, Er-and Pr-doped fluoride glasses appropriate for fibre lasers, upconversion laser systems, and amplifiers operating at 1064 and 1550 nm. A series of fluoride glasses doped with different 31 31 31 concentrations of Nd , Er and Pr ions have been prepared. The room temperature fluorescence spectra of these glasses under various excitation wavelengths have been investigated. Fluorescence lifetimes have been measured for the most interesting transitions.
Optical fibre technology by triple and quadruple crucible methods
ABSTRACT
Technologia biernych podzespołów światłowodowych
Elektronika Konstrukcje Technologie Zastosowania, 2001
Investigation of Mach-Zehnder effects in tapered fibre long period gratings
Conference on Lasers and Electro-Optics Europe - Technical Digest, 2005
A new fibre Mach-Zehnder type based on a single LPG written in a biconical fibre taper is present... more A new fibre Mach-Zehnder type based on a single LPG written in a biconical fibre taper is presented alongside a theoretical model supporting the observed effect
Electronics Letters, 2005
A single long-period fibre grating was written in a biconical fibre taper made from standard comm... more A single long-period fibre grating was written in a biconical fibre taper made from standard communications step-index optical fibre, resulting in an interferometric fibre sensor device that provided a resolution of 1 Â 10 À4 for refractive indices in the range of 1.30 to 1.34, suggesting that these devices may be suitable for use with aqueous solutions.
Yb3+ sensitised Er3+ doped silica optical fibre with ultrahigh transfer efficiency and gain
Electronics Letters, 1991
ABSTRACT
Utilization of glass optical waveguides in electron and gamma ray dosimetry
Laboratory of Fundamentals of Optoelectronics and Optoelectronics Measurements