Bandwidth length product
The bandwidth length product is the product of the maximum bandwidth and length of a fiber optic cable . In addition to attenuation, it is another important parameter for the quality of the fiber. It is an important parameter for multimode fibers .
B` = B * l (unit MHz * km)
B` is the bandwidth length product in MHz * km, B is the bandwidth in Hz and l is the fiber length in kilometers.
A fiber with a bandwidth length product of 1200 MHz · km and a fiber length of 1000 m can cope with a bandwidth of 1200 MHz. With a fiber length of 500 m, transmission can even be carried out with a bandwidth of 2400 MHz. Conversely, with a fiber length of 2000 m, the bandwidth must be throttled to 600 MHz.
Due to the high quality of the single-mode fiber , you usually do not specify this size here and limit yourself to the attenuation values.
literature
- Jürgen Scherff: Basic course in computer networks. 2nd edition, Springer Fachmedien, Wiesbaden 2010, ISBN 978-3-8348-0366-5 .
- Martin Werner: communications engineering. An introduction to all courses, 7th edition, Vieweg + Teubner Verlag, Wiesbaden 2010, ISBN 978-3-8348-0905-6 .
- Ulrich Freyer: News transmission technology. Basics, components, processes and systems of telecommunications technology . 1st edition. Carl Hanser Verlag, Munich 2009, ISBN 978-3-446-41462-4 .
- Bernhard Hauser: Expertise in network technology . 2nd edition, Europa-Lehrmittel Verlag, Haan 2015, ISBN 978-3-8085-5402-9
Web links
- Information on fiber optic technology (accessed December 14, 2017)
- THE FIBERGLASS AS THE CENTER OF THE DATA TRANSMISSION (accessed on December 14, 2017)