Ho ea ka litlhoko tse fapaneng tsa basebelisi, mefuta e fapaneng ea lits'ebeletso, le nts'etsopele ea theknoloji ka mekhahlelo e fapaneng, mofuta oa litsamaiso tsa puisano tsa fiber optical li ka fapana.
Hajoale, ho sebelisoa mefuta e mengata e batlang e le ngata bakeng sa litsamaiso tsa puisano tsa optical fiber dijithale tsa ho feto-fetoha ha matla / ho lemoha ka ho toba (IM / DD).Setšoantšo sa thibelo ea molao-motheo oa tsamaiso ena se bontšoa ho Setšoantšo sa 1. Joalokaha ho ka bonoa setšoantšong, mokhoa oa puisano oa optical fiber digital o entsoe haholo-holo ka mochine oa optical transmitter, optical fiber le optical receiver.
Setšoantšo sa 1 Setšoantšo sa schematic sa optical fiber digital communication system
Lenaneong la puisano la fiber optical point-to-point, mokhoa oa phetisetso ea lets'oao: lets'oao la ho kenya le rometsoeng ho terminal ea optical transmitter le fetoloa hore e be sebopeho sa khoutu se loketseng ho fetisoa ka fiber ea optical kamora phetoho ea mohlala, le matla a leseli. Mohloli o tsamaisoa ka kotloloho ke potoloho ea koloi Modulation, e le hore matla a optical a hlahisoang ke mohloli oa leseli a fetohe ka lets'oao la ho kenya, ke hore, mohloli oa leseli o phethela phetoho ea motlakase / optical mme o romela lets'oao le ts'oanang la matla a optical ho fiber optical. bakeng sa phetiso;meleng ea tsamaiso ea puisano, hona joale, fiber ea optical e nang le mokhoa o le mong Sena se bakoa ke litšobotsi tse ntle tsa phetisetso;ka mor'a hore lets'oao le fihle pheletsong e amohelang, lets'oao la optical le kenang le qala ho bonoa ka kotloloho ke sets'oants'o sa foto ho phethela phetoho ea optical / motlakase, ebe e holisoa, e lekanngoa le ho ahloloa.Letoto la ts'ebetso ea ho e khutlisetsa ho lets'oao la motlakase la mantlha, ka hona ho phethela ts'ebetso eohle ea phetisetso.
E le ho netefatsa boleng ba puisano, mochine oa optical o lokela ho fanoa ka sebaka se loketseng pakeng tsa li-transceivers.Ho na le mefuta e 'meli e meholo ea li-optical repeaters ka puisano ea fiber ea optical, e' ngoe ke e pheta-pheta ka mokhoa oa phetoho ea optical-electrical-optical, 'me e' ngoe ke ea optical amplifier e matlafatsang ka ho toba pontšo ea optical.
Litsamaisong tsa puisano tsa fiber ea optical, lintlha tse ka sehloohong tse khethollang sebaka sa relay ke tahlehelo ea optical fiber le bandwidth ea phetisetso.
Ka kakaretso, ho fokotseha ha fiber ka bolelele ba yuniti ea phetisetso ho fiber ho sebelisoa ho emela tahlehelo ea fiber, 'me yuniti ea eona ke dB / km.Hajoale, fiber e sebetsang ea silica-based optical e na le tahlehelo e ka bang 2 dB / km ho sehlopha sa 0.8 ho isa ho 0.9 μm;tahlehelo ea 5 dB / km ho 1,31 μm;'me ho 1,55 μm, tahlehelo e ka fokotsoa ho 0.2 dB / km, e leng haufi le Moeli oa theory of SiO2 fiber tahlehelo.Ka tloaelo, 0.85 μm e bitsoa bolelele bo bokhutšoane ba puisano ea fiber optic;1.31 μm le 1.55 μm li bitsoa bolelele ba nako e telele ea puisano ea fiber optical.Ke lifensetere tse tharo tse sebetsang tsa tahlehelo e tlase ho puisano ea fiber ea optical.
Puisanong ea dijithale optical fiber, tlhahisoleseling e fetisoa ke ho ba teng kapa ho se be teng ha mats'oao a mahlo nako le nako.Ka hona, sebaka sa relay se boetse se lekanyelitsoe ke bandwidth ea phetiso ea fiber.Ka kakaretso, MHz.km e sebelisoa e le yuniti ea bandwidth ea phetisetso ka bolelele ba yuniti ea fiber.Haeba bandwidth ea fiber e itseng e fanoe e le 100MHz.km, ho bolela hore ke matshwao a marang-rang a 100MHz feela a lumelloang ho fetisoa k'hilomithara e 'ngoe le e 'ngoe ea fiber.Ha sebaka se selelele le se senyenyane sa bandwidth ea phetisetso, matla a puisano a fokotseha.