Dr. Michal Lucki Profile

Dr. Michal Lucki

at Czech Technical Univ in Prague

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Author

Publications (20)

PROCEEDINGS ARTICLE | February 16, 2017

New waveguide shape for low loss and high uniformity y-branch optical splitter

Proc. SPIE. 10106, Integrated Optics: Devices, Materials, and Technologies XXI

KEYWORDS: Fiber to the x, Waveguides, Fiber optics, Scattering, Light scattering, Networks, Computer simulations, Televisions, Optical fiber cables, Neodymium

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PROCEEDINGS ARTICLE | August 26, 2015

The impacts of ageing effects due to radiation burden on optical fiber couplers

Proc. SPIE. 9586, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications IX

KEYWORDS: Optical fibers, Optical components, Optical filters, Cladding, Nickel, Coating, Fiber lasers, Gamma radiation, Optical networks, Radiation effects

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The paper discuss about accelerated ageing of optical fiber elements in their burdened with gamma radiation. In addition to the destruction of coating materials, gamma radiation has its effect on the internal structure of the optical fiber. It is necessary to specify the changes in the optical coupler and find out why these changes occur.

This article contains experimental measurement of the impact of gamma radiation Cobalt-60 on the optical couplers of various split performance ratio. The couplers were exposed to gradually increasing doses of 60Co. Measurements are focused on the overall distribution of the energy in the core and cladding various branches of SM optical fiber couplers. This article focuses on applied research and experimental development of resources for safety operation of optical networks since monitoring of ageing substantially contributes to its security. It addresses issues of accelerated ageing of optical fiber elements in their burdened with gamma radiation. How does radiation energy of gamma radiation influence optical network elements? This effect is explored just very little bit and is yet another unanswered question. In addition to the destruction of coating materials, gamma radiation has its effect on the internal structure of the optical fiber. It is necessary to specify the changes in the optical coupler and find out why these changes occur. This article contains experimental measurement of the impact of gamma radiation Cobalt-60 on the optical couplers of various split performance ratio. Optical passive components, couplers, were exposed to gradually increasing doses of ⁶⁰Co. Measurements are focused on the overall distribution of the energy of LP₀₁ mode in the core and cladding various branches of SM optical fiber couplers. Graphical and mathematical detect changes in the dissemination of energy coupler after single doses of gamma radiation are useful to understand the phenomenon of accelerated ageing elements of optical networks in environments with an increased incidence of radiation energy. Keywords: 2-D view, 3-D view, coupler, gamma radiation, Cobalt-60, ageing, energy

PROCEEDINGS ARTICLE | May 21, 2015

Laser ablation for membrane processing of AlGaN/GaN- and micro structured ferroelectric thin film MEMS and SiC pressure sensors for extreme conditions

Proc. SPIE. 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems

KEYWORDS: Microelectromechanical systems, Thin films, Polarization, Sensors, Glasses, Ceramics, Laser ablation, Sapphire, Silicon carbide, Reactive ion etching

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PROCEEDINGS ARTICLE | May 7, 2015

Investigation of optical thin films printed on the surface of facets of photonic crystal fibers

Proc. SPIE. 9507, Micro-structured and Specialty Optical Fibres IV

KEYWORDS: Gold, Thin films, Optical filters, Photonic crystal fibers, Waveguides, Polarization, Metals, Laser ablation, Free space optics, Filtering (signal processing)

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Optical fibres are widely used in various applications as a medium for optical signals or optical transfer. This transport can be realized on long distance, compared to free space optics, which significantly extends reach of applications. Free space optics and fibre optics are combined in practice to yield the maximum performance of individual components forming a particular system. In such cases, light coupling from free space into fibres is required and it is frequently implemented with the use of lenses. An optical signal coupled into a fibre may also need certain modifications of spectral and spatial properties to allow its propagation down the fibre or reduce the amount of power carried in. The above requirement has been fulfilled by modifying surface of facets of photonic crystal fibres. By extrusion of a certain amount of host material from the surface, it is possible to obtain a structure resembling a thin film or an opaque layer for certain wavelengths. Several different structures of photonic crystal fibres and materials are considered to show influence of such thin-film on signal properties. This investigation is carried out in context of abilities of ablation of material from surfaces of photonic crystal fibres. Only certain shapes and geometrical arrangements can be considered. One of the goals is to specify, which of them are key for potential modification of spectral characteristics of photonic crystal fibres. The printed structures could potentially work like a thin-film ablation. Rigorous and versatile finite difference method has been employed to model propagation of light, its incidence onto a surface of the photonic crystal fibre, and subsequent propagation down the fibre. The simulations are carried on small pieces of photonic crystal fibres, with the length of tens of micrometres, due to well-known demands of the simulation technique on computational resources. Nevertheless, such a simplification is valid, since the structure is longitudinally uniform beyond the thin-film layer. However, this is aspect is not covered in the presented paper and it is our ongoing effort. Finally, the goal is to verify if the investigated structures can work as a slot waveguide.

PROCEEDINGS ARTICLE | February 7, 2015

Software design of segment optical transmitter for indoor free-space optical networks

Proc. SPIE. 9387, Broadband Access Communication Technologies IX

KEYWORDS: Transmitters, Optical design, Eye, Safety, Free space, Adaptive optics, Telecommunications, Free space optics, Optical networks, Standards development

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SPIE Journal Paper | October 27, 2014

Dispersion limits in the design of small-mode-area photonic crystal fibers

Zeleny, Richard , Lucki, Michal

OE Vol. 53 Issue 10

KEYWORDS: Dispersion, Picosecond phenomena, Photonic crystal fibers, Structured optical fibers, Cladding, Waveguides, Wave propagation, Telecommunications, Silica, Phase matching

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PROCEEDINGS ARTICLE | May 15, 2014

Precise optical differential thermometer sensor based on interferometric measurement of thermal expansion coefficient

Proc. SPIE. 9141, Optical Sensing and Detection III

KEYWORDS: Mirrors, Beam splitters, Interferometers, Sensors, Copper, Interferometry, Signal detection, Dielectric mirrors, Temperature metrology, Michelson interferometers

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PROCEEDINGS ARTICLE | May 2, 2014

Dispersion limits of the small mode area photonic crystal fibers designed as a broadband compensator

Proc. SPIE. 9128, Micro-structured and Specialty Optical Fibres III

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Cladding, Dispersion, Photonic crystals, Doping, Wave propagation, Phase matching

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PROCEEDINGS ARTICLE | May 1, 2014

Limits of advanced modulation formats for transition in fiber optic telecommunication systems to increase speeds from 10, 40, 100 Gbps to higher bit rates

Proc. SPIE. 9131, Optical Modelling and Design III

KEYWORDS: Transmitters, Modulation, Polarization, Receivers, Phase shift keying, Multiplexing, Terahertz radiation, Dense wavelength division multiplexing, Signal detection, Binary data

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PROCEEDINGS ARTICLE | May 3, 2013

Broadband submicron flattened dispersion compensating fiber with asymmetrical fluoride doped core

Proc. SPIE. 8775, Micro-structured and Specialty Optical Fibres II

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Cladding, Signal attenuation, Dispersion, Glasses, Wave propagation, Telecommunications, Radio propagation

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PROCEEDINGS ARTICLE | May 3, 2013

Broadband dispersion decreasing photonic crystal fiber for compression of optical pulses

Proc. SPIE. 8775, Micro-structured and Specialty Optical Fibres II

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Dispersion, Solitons, Raman spectroscopy, Wave propagation, Picosecond phenomena, Scanning probe microscopy

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SPIE Journal Paper | April 8, 2013

Nearly zero dispersion-flattened photonic crystal fiber with fluorine-doped three-fold symmetry core

Zeleny, Richard , Lucki, Michal

OE Vol. 52 Issue 04

KEYWORDS: Dispersion, Photonic crystal fibers, Refractive index, Waveguides, Silica, Doping, Picosecond phenomena, Cladding, Fluorine, Optical fibers

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PROCEEDINGS ARTICLE | April 26, 2012

An improved non-linear nearly-zero dispersion flattened photonic crystal fiber with the threefold symmetry core

Proc. SPIE. 8426, Microstructured and Specialty Optical Fibres

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Dispersion, Doping, Telecommunications, Transmittance, Picosecond phenomena, Tolerancing

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PROCEEDINGS ARTICLE | October 11, 2011

Broadband dispersion compensating photonic crystal fiber

Proc. SPIE. 8306, Photonics, Devices, and Systems V

KEYWORDS: Refractive index, Photonic crystal fibers, Signal attenuation, Dispersion, Doping, L band, Wavelength division multiplexing, Structured optical fibers, Telecommunications, Picosecond phenomena

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PROCEEDINGS ARTICLE | May 11, 2011

Photonic crystal fiber with flattened dispersion

Proc. SPIE. 8073, Optical Sensors 2011; and Photonic Crystal Fibers V

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Dispersion, L band, Structured optical fibers, Computer simulations, Telecommunications, Solids

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PROCEEDINGS ARTICLE | November 18, 2008

Design of photonic crystal fibers with low bending losses

Proc. SPIE. 7138, Photonics, Devices, and Systems IV

KEYWORDS: Optical components, Optical filters, Refractive index, Optical design, Photonic crystal fibers, Cladding, Dispersion, Photonic crystals, Optical switching, Electrical engineering

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PROCEEDINGS ARTICLE | April 22, 2008

A short overview of the most actual problems in the area of fiber bending and chromatic dispersion in photonic crystal fibers

Proc. SPIE. 6990, Photonic Crystal Fibers II

KEYWORDS: Refractive index, Photonic crystal fibers, Cladding, Dispersion, Telecommunications, Nonlinear optics, Critical dimension metrology, Tolerancing, Micro optical fluidics, Light wave propagation

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PROCEEDINGS ARTICLE | May 17, 2007

Chosen aspects of negative dispersion generation in index guiding photonic crystal fibers

Proc. SPIE. 6588, Photonic Crystal Fibers

KEYWORDS: Photonic crystal fibers, Cladding, Signal attenuation, Dispersion, Doping, Distortion, Wave propagation, Telecommunications, Nonlinear optics, Tolerancing

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PROCEEDINGS ARTICLE | April 18, 2006

Flexible control of dispersion in index guiding photonic crystal fibers governed by geometrical parameters

Proc. SPIE. 6182, Photonic Crystal Materials and Devices III (i.e. V)

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Cladding, Dispersion, Structured optical fibers, Wave propagation, Telecommunications, Supercontinuum generation

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PROCEEDINGS ARTICLE | October 12, 2005

Band gap structure as the Photonic Crystal Fiber guidance mechanism

Proc. SPIE. 5950, Photonic Crystals and Fibers

KEYWORDS: Refractive index, Photonic crystal fibers, Silica, Waveguides, Cladding, Ultraviolet radiation, Photonic crystals, Wave propagation, Infrared radiation, Light wave propagation

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Showing 5 of 20 publications

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