Jure Tratnik - Academia.edu (original) (raw)
Papers by Jure Tratnik
The new generation of accelerators requires timing distribution and RF synchronization with femto... more The new generation of accelerators requires timing distribution and RF synchronization with femtosecond precision in terms of jitter and long-term stability. The proposed electro-optical synchronization system makes use of commercial telecom single-mode optical fibre operating at 1550 nm.. It operates on over 300 m distance. It consists of a transmitter, located near a low-jitter master oscillator, and receiver, located at the remote location. The field experiments have been done in the accelerator environment with the fibre pair in the tunnel. The prototype units were installed at the same location to make phase difference measurement simple. Temperature in various installation points, phase difference and both units internal operational parameters were continuously monitored and stored. Data was post-analysed and conclusions were used for hardware changes and mostly the long-term stability improvement. A dedicated phase detector was designed to monitor less than 20 fs changes. Res...
2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching, 2013
ABSTRACT By applying an electrical current to the metal-coated fiber, a relation between the appl... more ABSTRACT By applying an electrical current to the metal-coated fiber, a relation between the applied power and the delay difference was measured. The temperature coefficient and the rise time exceed those of other optical-fiber delay-line implementations.
Elektrotehniski Vestnik/Electrotechnical Review
In this paper basic ideas of quantum cryptography (QC) are presented. The QC basis are no longer ... more In this paper basic ideas of quantum cryptography (QC) are presented. The QC basis are no longer based on mathematical algorithms but on physical features of light or its quanta called photons. The indivisible entity of the photon energy, described by A. Einstein (1), the uncertainty principle and polarization states of light can be used in protocols for quantum key distribution (QKD) [2]. The first protocol for QKD was the BB84 protocol. It was named after C. Bennett in G. Brassard. It works on the photon polarization principle with photons present in four different polarization states (linear vertical, linear horizontal, circular left and circular right) and measured with two techniques (linear and circular method), shown in Figures 2 and 3 [3]. The BB84 protocol is a two-point protocol where Alice (Tx) sends a random set of photons to Bob (Rx). Bob receives and defines them by using two measurement techniques. The raw key is created after changing the producing- and measurement-m...
IEEE EUROCON 2009, 2009
This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient... more This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient. A brief description of interferometric and noninterferometric techniques is included as a basis for comparing their relative performance and limitations. All of reviewed measurement techniques use one of the Kerr-related phenomena which are self-phase modulation, modulation instability, cross-phase modulation or four-wave mixing. This paper focuses on the
2013 IEEE International Topical Meeting on Microwave Photonics (MWP), 2013
ABSTRACT An electro-optical system for a RF-clock-distribution with a temperature-drift and a vib... more ABSTRACT An electro-optical system for a RF-clock-distribution with a temperature-drift and a vibration compensation is presented. An added timing jitter of less than 10 fs_RMS and a clock drift of 50 fs_RMS over 26 hours have been measured. The RF signal is distributed through a transmitter - receiver topology as intensity modulation on a CW laser at 1550 nm. The temperature and the vibration-induced fiber group-delay variations are compensated by adjusting the wavelength of the laser and making use of the fiber chromatic dispersion. The system uses standard commercially available telecommunication optical components.
IEEE EUROCON 2009, 2009
A simple concept of fiber optic communication topology using Mach-Zehnder interferometer is prese... more A simple concept of fiber optic communication topology using Mach-Zehnder interferometer is presented. This kind of communication can be used for secure encryption-key distribution or secure point-to-point full-duplex data-transfer communication. In both interferometric-communication applications standard optical components and single-mode fibers are used. Maximum fiber length is dependent on system noise, which must not exceed the interference pattern.
Optical and Quantum Electronics, 2013
In this paper we present a novel, time-delay approach using a copper-coated fiber. Piezo optical-... more In this paper we present a novel, time-delay approach using a copper-coated fiber. Piezo optical-fiber stretchers and temperature-controlled fiber spools are normally used for a conventional time-delay lines. A copper-coated fiber preserves the performance of a standard single-mode optical fiber, while at the same time acting as an electrical wire, which can be effectively heated by applying an electrical current. As a result of the significant temperature change, the signal (group) delay can be properly adjusted and controlled. Compared to piezo optical-fiber stretchers and temperature-controlled fiber spools, much shorter lengths of fiber are required and a faster response time can be achieved. This paper also proposes a simple, lumped thermal model and thus a copper-coated fiber can be included in the heat-transfer and response-time calculations of a realistic system that involves surrounding elements (e.g., heatsinks). Metal-coated fibers • Copper-coated fibers • Optical delay line • Thermal constants U. Dragonja (B) • J. Tratnik • B. Batagelj Laboratory for advanced sensors and instrumentation, Centre of Excellence for Biosensors,
The present invention refers to a phase shifter with a reduced influence of errors which measures... more The present invention refers to a phase shifter with a reduced influence of errors which measures the phase difference between two signals. According to the invention, the system consists of at least two phase detectors (3, 4) with the wanted signal (1) and the actual signal (2) on their inputs, the respective detectors (3, 4) in a series connected to the respective adaptation circuits of the voltage levels (6, 7) with a pair of signals (8, 9; 10, 11) at their inputs coming from the respective phase detector (3, 4), and an adjustable resistance splitter (16) with a pair of signals (12, 13; 14, 15) coming from the respective adjustment circuits (6, 7) at its input and the wanted or desired signal (17) at its output.
The new generation of accelerators requires timing distribution and RF synchronization with femto... more The new generation of accelerators requires timing distribution and RF synchronization with femtosecond precision in terms of jitter and long-term stability. The proposed electro-optical synchronization system makes use of commercial telecom single-mode optical fibre operating at 1550 nm. It operates on over 300 m distance. It consists of a transmitter, located near a low-jitter master oscillator, and receiver, located at the remote location. The field experiments have been done in the accelerator environment with the fibre pair laid in the tunnel. The prototype units were installed at the same location to make phase difference measurement simple. Temperature in various installation points, phase difference and both units internal operational parameters were continuously monitored and stored. Data was post-analysed and conclusions were used for hardware changes and mostly the long-term stability improvement. A dedicated phase detector was designed to monitor femtosecond-level change...
IEEE EUROCON 2009, 2009
This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient... more This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient. A brief description of interferometric and noninterferometric techniques is included as a basis for comparing their relative performance and limitations. All of reviewed measurement techniques use one of the Kerr-related phenomena which are self-phase modulation, modulation instability, cross-phase modulation or four-wave mixing. This paper focuses on the
IEEE EUROCON 2009, 2009
... Patrik Ritosa, Tomaz Korosec, Jure Tratnik, Luka Naglic and Bostjan Batagelj ... Microstrip p... more ... Patrik Ritosa, Tomaz Korosec, Jure Tratnik, Luka Naglic and Bostjan Batagelj ... Microstrip patch antennas as a basic radiation element allow simple and inexpensive fabrication, good impedance matching and polarization selection. ...
The new generation of accelerators requires timing distribution and RF synchronization with femto... more The new generation of accelerators requires timing distribution and RF synchronization with femtosecond precision in terms of jitter and long-term stability. The proposed electro-optical synchronization system makes use of commercial telecom single-mode optical fibre operating at 1550 nm.. It operates on over 300 m distance. It consists of a transmitter, located near a low-jitter master oscillator, and receiver, located at the remote location. The field experiments have been done in the accelerator environment with the fibre pair in the tunnel. The prototype units were installed at the same location to make phase difference measurement simple. Temperature in various installation points, phase difference and both units internal operational parameters were continuously monitored and stored. Data was post-analysed and conclusions were used for hardware changes and mostly the long-term stability improvement. A dedicated phase detector was designed to monitor less than 20 fs changes. Res...
2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching, 2013
ABSTRACT By applying an electrical current to the metal-coated fiber, a relation between the appl... more ABSTRACT By applying an electrical current to the metal-coated fiber, a relation between the applied power and the delay difference was measured. The temperature coefficient and the rise time exceed those of other optical-fiber delay-line implementations.
Elektrotehniski Vestnik/Electrotechnical Review
In this paper basic ideas of quantum cryptography (QC) are presented. The QC basis are no longer ... more In this paper basic ideas of quantum cryptography (QC) are presented. The QC basis are no longer based on mathematical algorithms but on physical features of light or its quanta called photons. The indivisible entity of the photon energy, described by A. Einstein (1), the uncertainty principle and polarization states of light can be used in protocols for quantum key distribution (QKD) [2]. The first protocol for QKD was the BB84 protocol. It was named after C. Bennett in G. Brassard. It works on the photon polarization principle with photons present in four different polarization states (linear vertical, linear horizontal, circular left and circular right) and measured with two techniques (linear and circular method), shown in Figures 2 and 3 [3]. The BB84 protocol is a two-point protocol where Alice (Tx) sends a random set of photons to Bob (Rx). Bob receives and defines them by using two measurement techniques. The raw key is created after changing the producing- and measurement-m...
IEEE EUROCON 2009, 2009
This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient... more This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient. A brief description of interferometric and noninterferometric techniques is included as a basis for comparing their relative performance and limitations. All of reviewed measurement techniques use one of the Kerr-related phenomena which are self-phase modulation, modulation instability, cross-phase modulation or four-wave mixing. This paper focuses on the
2013 IEEE International Topical Meeting on Microwave Photonics (MWP), 2013
ABSTRACT An electro-optical system for a RF-clock-distribution with a temperature-drift and a vib... more ABSTRACT An electro-optical system for a RF-clock-distribution with a temperature-drift and a vibration compensation is presented. An added timing jitter of less than 10 fs_RMS and a clock drift of 50 fs_RMS over 26 hours have been measured. The RF signal is distributed through a transmitter - receiver topology as intensity modulation on a CW laser at 1550 nm. The temperature and the vibration-induced fiber group-delay variations are compensated by adjusting the wavelength of the laser and making use of the fiber chromatic dispersion. The system uses standard commercially available telecommunication optical components.
IEEE EUROCON 2009, 2009
A simple concept of fiber optic communication topology using Mach-Zehnder interferometer is prese... more A simple concept of fiber optic communication topology using Mach-Zehnder interferometer is presented. This kind of communication can be used for secure encryption-key distribution or secure point-to-point full-duplex data-transfer communication. In both interferometric-communication applications standard optical components and single-mode fibers are used. Maximum fiber length is dependent on system noise, which must not exceed the interference pattern.
Optical and Quantum Electronics, 2013
In this paper we present a novel, time-delay approach using a copper-coated fiber. Piezo optical-... more In this paper we present a novel, time-delay approach using a copper-coated fiber. Piezo optical-fiber stretchers and temperature-controlled fiber spools are normally used for a conventional time-delay lines. A copper-coated fiber preserves the performance of a standard single-mode optical fiber, while at the same time acting as an electrical wire, which can be effectively heated by applying an electrical current. As a result of the significant temperature change, the signal (group) delay can be properly adjusted and controlled. Compared to piezo optical-fiber stretchers and temperature-controlled fiber spools, much shorter lengths of fiber are required and a faster response time can be achieved. This paper also proposes a simple, lumped thermal model and thus a copper-coated fiber can be included in the heat-transfer and response-time calculations of a realistic system that involves surrounding elements (e.g., heatsinks). Metal-coated fibers • Copper-coated fibers • Optical delay line • Thermal constants U. Dragonja (B) • J. Tratnik • B. Batagelj Laboratory for advanced sensors and instrumentation, Centre of Excellence for Biosensors,
The present invention refers to a phase shifter with a reduced influence of errors which measures... more The present invention refers to a phase shifter with a reduced influence of errors which measures the phase difference between two signals. According to the invention, the system consists of at least two phase detectors (3, 4) with the wanted signal (1) and the actual signal (2) on their inputs, the respective detectors (3, 4) in a series connected to the respective adaptation circuits of the voltage levels (6, 7) with a pair of signals (8, 9; 10, 11) at their inputs coming from the respective phase detector (3, 4), and an adjustable resistance splitter (16) with a pair of signals (12, 13; 14, 15) coming from the respective adjustment circuits (6, 7) at its input and the wanted or desired signal (17) at its output.
The new generation of accelerators requires timing distribution and RF synchronization with femto... more The new generation of accelerators requires timing distribution and RF synchronization with femtosecond precision in terms of jitter and long-term stability. The proposed electro-optical synchronization system makes use of commercial telecom single-mode optical fibre operating at 1550 nm. It operates on over 300 m distance. It consists of a transmitter, located near a low-jitter master oscillator, and receiver, located at the remote location. The field experiments have been done in the accelerator environment with the fibre pair laid in the tunnel. The prototype units were installed at the same location to make phase difference measurement simple. Temperature in various installation points, phase difference and both units internal operational parameters were continuously monitored and stored. Data was post-analysed and conclusions were used for hardware changes and mostly the long-term stability improvement. A dedicated phase detector was designed to monitor femtosecond-level change...
IEEE EUROCON 2009, 2009
This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient... more This paper describes recent progress in measuring single mode optical fiber nonlinear coefficient. A brief description of interferometric and noninterferometric techniques is included as a basis for comparing their relative performance and limitations. All of reviewed measurement techniques use one of the Kerr-related phenomena which are self-phase modulation, modulation instability, cross-phase modulation or four-wave mixing. This paper focuses on the
IEEE EUROCON 2009, 2009
... Patrik Ritosa, Tomaz Korosec, Jure Tratnik, Luka Naglic and Bostjan Batagelj ... Microstrip p... more ... Patrik Ritosa, Tomaz Korosec, Jure Tratnik, Luka Naglic and Bostjan Batagelj ... Microstrip patch antennas as a basic radiation element allow simple and inexpensive fabrication, good impedance matching and polarization selection. ...