|
|
Zařízení pro výrobu kónicky zúžených optických vláken
Martan, Tomáš ; Novotný, K. ; Honzátko, Pavel ; Kaňka, Jiří
The paper deals with technology of manufacturing fiber tapers that are made by heating and stretching a standard optical fiber (e.g. SMF, PCS or MOF) in a heat source. For fabrication of the fiber tapers have been designed and assembled the apparatus that is propelled with motors and controlled by a PC and other electronic equipments. Manufactured tapered optical fibers can be used e.g. in nonlinear optics, for various types of fiber evanescence chemical sensors and holography. 482
|
|
| |
|
|
Er: Yb fibre-optic laser excited by a diode
Zavadilová, A. ; Kubeček, V. ; Honzátko, Pavel ; Kašík, Ivan ; Matějec, Vlastimil
The paper deals with the employment of special optical fiber doped in the core with ytterbium and erbium ions in a fiber laser emitting at 1540 nm. The fiber was drawn from a preform prepared by the MCVD method at it was coated with a polysiloxane polymer coating with a refractive index lower than of silica. This coating makes possible to launch light from a laser diode directly into a silica jacket of the fiber. An output power of 47 mW was measured with an excitation diode power of 860 mW.
|
|
|
Optimal fibre cross section shape for cladding-pumped fibre lasers and amplifiers
Peterka, Pavel ; Kašík, Ivan ; Matějec, Vlastimil
The efficiency of the cladding-pumped fibre amplifier critically depends on the coupling of the pump radiation from the inner cladding to the single mode signal core, doped with rare earth ions /Er, Yb, .../. This coupling depends on the cross sectional shape of the inner cladding. In the paper, the conditions of the optimal shape are defined. Verification of these conditions in case of several specific examples, including experimental fibre prepared in the author's laboratory, is shown.
|
|
|
Microstructure optical fibres
Kaňka, Jiří ; Honzátko, Pavel ; Matějec, Vlastimil ; Kašík, Ivan ; Martan, Tomáš
A review of microstructure optical fibers, their use and methods of preparation is presented. Two classes of microstructure optical fibers in accordance with wave guiding mechanism are introduced. Unique dispersion properties and their structure dependence are discussed. Highly nonliner fibers, large mode area fibers and highly birefringent fibers are reported. Finally, the research carried out IREE Prague is summarized.
|
|
| |
|
| |
|
| |
|
| |
|
| |
guest ::
