National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Optics and its competitors in access networks
Kuchar, Anton
Various technology options of telecommunications access networks are discussed: metallic, optical fibre and wireless. They are compared according to their achievable technical parameters, capital (CAPEX) and operational expenses (OPEX), legislative constraints and prospects for further development. Market share of the major access technologies in Japan, Norway, Ireland and the Czech Republic are given
Fiberisation of access networks - update
Kuchar, Anton ; Hrstka, J.
Up-to-date information on the progress in implementation of optical access networks abroad and in the Czech Republic is given. Special attention is given to the situation in Europe, progress in this area in France, where mass implementation of optical fibres in access network has already begun, a is described in detail. A list of companies providing access to broadband networks over optical fibre links in the CR is given and the main obstacles to accelerate this process are identified.
FTTx networks in the year 2008 – worldwide developments
Kuchar, Anton
The presentation gives an overview of the worldwide progress and trends in the development of optical access networks FTTx. Special attention is paid to situation in Europe. Competitive technologies for broadband access to the Internet are also considered. The presentation observes that while in Japan, Korea and recently also in the USA the FTTx access networks have become a massive phenomenon, in Europe FTTx are being so far built mainly by municipalities and utilities with the exception of France.
Parametrické zesilování a vícenásobná generace vlnových délek ve vysoce nelineárním optickém vláknu: Experiment a modelování
Karásek, Miroslav ; Kaňka, Jiří ; Radil, J. ; Vojtěch, J.
We demonstrate parametric amplification of WDM signals and multiple wavelength conversion with gain based on four-photon parametric mixing in a highly nonlinear fibre (HNLF). Two pumps with a 100 GHz separation located in the region of anomalous dispersion of the HNLF are combined to form a beet signal. A high-power EDFA boosts the beet signal which is then combined with a signal wave by a directional coupler into the HNLF.
Optické zesilovače v sítích CzechLight a CESNET2
Karásek, Miroslav ; Radil, J. ; Vojtěch, J.
In this contribution, we present an overview of optical fibre amplifiers used in the CzechLight and CESNET2 research and educational networks. Properties and advantages-disadvantages of EDFA. RFA and SOA are compared.

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