Selelekela sa tšebeliso eaPhetiso ea optical RFRF ka holim'a Fiber
Lilemong tse mashome tsa morao tjena, theknoloji ea puisano ea microwave le theknoloji ea optical telecommunications e tsoetse pele ka potlako. Litheknoloji ka bobeli li entse tsoelo-pele e kholo mafapheng a tsona, hape li lebisitse ho nts'etsopele e potlakileng ea lits'ebeletso tsa likhokahano tsa mehala le phetiso ea data, e leng se tlisitseng boiketlo bo boholo maphelong a batho. Litheknoloji tse peli tsa puisano ka microwave le puisano ea photoelectric li na le melemo ea tsona, empa li boetse li na le mefokolo e meng e ke keng ea hlōloa. Phetiso ea motlakase ea lifoto e hloka marang-rang a 'mele,' me ho na le mefokolo ea ho feto-fetoha ha maemo, marang-rang a potlakileng le ho tsamaea ha kaho. Puisano ea microwave e na le mefokolo ea phetisetso ea sebaka se selelele le matla a maholo, 'me microwave e hloka ho holisoa khafetsa le ho fetisoa hape,' me bandwidth ea phetisetso e lekanyelitsoe ke maqhubu a sepalangoang. Sena se ile sa lebisa ho kopanngoeng ha theknoloji ea microwave le ea optical Fiber transmission, ke hore, theknoloji ea Radio over Fiber(ROF), eo hangata e bitsoang.RF ka holim'a Fiber, kapa theknoloji e hole ea maqhubu a seea-le-moea. Tšimo e sebelisoang ka ho fetisisa ea RF holim'a theknoloji ea Fiber ke sebaka sa puisano ea fiber optical, ho kenyelletsa le liteishene tsa mehala ea mehala, litsamaiso tse ajoang, li-wireless Broadband, cable TV, puisano ea marang-rang ea poraefete joalo-joalo. Lilemong tsa morao tjena, ka ho phahama ha li-photonics tsa microwave, theknoloji ea RF over Fiber e sebelisitsoe haholo ho radar ea microwave photon, puisano ea UAV, lipatlisiso tsa linaleli le likarolo tse ling. Ho latela mefuta e fapaneng ea ho feto-fetoha ha laser, puisano ea laser e ka aroloa ka modulation ea ka hare le ea kantle, e sebelisoang hangata ke ea kantle, 'me RF over Fiber e ipapisitse le ho feto-fetoha ha laser ea kantle e hlalositsoe pampiring ena. Lihokelo tsa RF over Fiber li entsoe haholo ka transceiver ea optical, transmission, leROF lihokelo, joalokaha ho bontšitsoe setšoantšong se latelang:
Kenyelletso e khuts'oane ea karolo ea leseli. LD e sebelisoa hangataDFB lasers(mofuta oa maikutlo a abuoang), tse sebelisetsoang lerata le tlase, lits'ebetso tse matla tsa mefuta e mengata, le lilase tsa FP(Fabry-Perot) li sebelisoa bakeng sa lits'ebetso tse sa batleng haholo. Maqhubu a sebelisoang hangata ke 1064nm le 1550nm. PD ke aphotodetector, 'me ka lehlakoreng le leng la sehokelo sa fiber optic, leseli le bonoa ke PIN photodiode ea moamoheli, e fetolang leseli hore e be lets'oao la motlakase ebe joale le kena mohatong o tloaelehileng oa ts'ebetso ea motlakase. Fibre ea optical e sebelisoang bakeng sa khokahano ea mahareng hangata ke mofuta o le mong le fiber ea mefuta e mengata. Fiber e nang le mokhoa o le mong e atisa ho sebelisoa marang-rang a mokokotlo ka lebaka la ho hasana ha eona le tahlehelo e tlaase. Multimode fiber e na le ts'ebeliso e itseng marang-rang a sebaka sa lehae hobane e theko e tlase ho e etsa ebile e ka amohela phetiso e ngata ka nako e le 'ngoe. Ho fokotseha ha lets'oao la optical ho fiber e nyane haholo, ke ~ 0.25dB / km ho 1550nm feela.
Ho ipapisitsoe le litšoaneleho tsa phetisetso ea mohala le phetiso ea optical, lihokelo tsa ROF li na le melemo e latelang ea tekheniki:
• Tahlehelo e tlase haholo, fiber attenuation e ka tlase ho 0.4 dB / km
• Phetiso ea fiber ultra-bandwidth, tahlehelo ea faeba e sa sebetseng khafetsa
• Khokahano e nang le mats'oao a holimo a ho tsamaisa / bandwidth ho fihla ho 110GHz• Electromagnetic Interference (EMI) resistance (maemo a mabe a leholimo ha a ame lets'oao)
• Theko e tlase ho mithara • Fiber e tenyetseha haholoanyane ebile e bobebe, e boima bo ka bang 1/25 ea waveguide le 1/10 ea thapo ea coaxial
• Tokiso e bonolo le e feto-fetohang ea li-modulator tsa electro-optic (bakeng sa litsamaiso tsa litšoantšo tsa bongaka le tsa mochini)
Nako ea poso: Mar-11-2025