| Popis: |
Optical fibres are well established in the domain of point-to-point telecommunications, where they demonstrate the advantages of very wide bandwidth, low attenuation, low weight and cost, and immunity to electromagnetic interference. Passive fibre components, such as four-port couplers for signal distribution or wavelength multiplexing, have emerged allowing increased exploitation of the available bandwidth or application in local-area networks and all-optical signal processing circuits. The advent of special amplifying fibres has provided transmission over effectively lossless channels, and has further driven the development of many peripheral passive components. Examples are fused-fibre couplers for amplifier pump multiplexing, fibre gratings for pump filtering or suppression of amplified spontaneous emission (ASE), and inline isolators to allow high gain and reduced gain ripple. Complementing advances in fibre amplifiers are fibre lasers that can convert poor-quality light from semiconductor devices into low-noise, single-frequency sources with the potential for broad tunability and high output power. |
