Nhanganyaya yekushandiswa kweRF optical transmission RF pamusoro peFiber

Nhanganyaya yekushandiswa kweRF optical kutapuriranaRF pamusoro peFiber

Mumakumi emakore achangopfuura, microwave kutaurirana uye optical telecommunication tekinoroji yakagadzira nekukurumidza. Matekinoroji ese ari maviri akafambira mberi zvakanyanya mundima dzawo, uye zvakakonzera kukurumidza kusimudzira kwenharembozha uye masevhisi ekufambisa data, zvichiunza kurerukirwa kukuru kuhupenyu hwevanhu. Iwo maviri matekinoroji eiyo microwave kutaurirana uye photoelectric kutaurirana ane zvawo zvakanakira, asi ivo vane zvimwe zvipingamupinyi zvisingagoni kukurirwa. Photoelectric transmission inoda kushamwaridzana kwemuviri, uye pane zvimwe zvinokanganisa mukushanduka, kukurumidza kushamwaridzana uye kufamba kwekuvaka. Kukurukurirana kweMicrowave kune zvimwe zvinokanganisa mukufambisira kure-kure uye hukuru hukuru, uye microwave inoda kazhinji relay kukwidziridzwa uye kutapuriranazve, uye bandwidth yekufambisa inoganhurwa neiyo inotakura frequency. Izvi zvakakonzera kubatanidzwa kwemicrowave uye optical Fiber transmission tekinoroji, kureva, Radio over Fiber(ROF) tekinoroji, iyo inowanzonzi.RF pamusoro peFiber, kana redhiyo frequency kuremotekinoroji. Iyo inonyanya kushandiswa munda weRF pamusoro peFiber tekinoroji inzvimbo yeoptical fiber kutaurirana, inosanganisira nharembozha nhepfenyuro, yakagoverwa masisitimu, isina waya Broadband, cable TV, yakavanzika network kutaurirana zvichingodaro. Mumakore achangopfuura, nekukwira kwema microwave photonics, RF pamusoro peFiber tekinoroji yakashandiswa zvakanyanya mumicrowave photon radar, kutaurirana kweUAV, kutsvagisa nyeredzi uye mamwe minda. Zvinoenderana nemhando dzakasiyana dzelaser modulation, kutaurirana kwelaser kunogona kukamurwa kuita yemukati modulation uye yekunze modulation, iyo inowanzoshandiswa ndeyekunze modulation, uye iyo RF pamusoro peFiber yakavakirwa ekunze laser modulation inotsanangurwa mupepa rino. RF pamusoro peFiber zvinongedzo zvinonyanya kuumbwa neoptical transceiver, kutapurirana, uyeROF links, sezvinoratidzwa mumufananidzo unotevera:

Sumo pfupi kune chikamu chechiedza. LD inowanzoshandiswaDFB lasers(yakagoverwa mhinduro mhando), iyo inoshandiswa kune yakaderera ruzha, yakakwirira dynamic range applications, uye FP (Fabry-Perot type) lasers anoshandiswa kune zvishoma zvinodikanwa zvikumbiro. Anonyanya kushandiswa wavelengths ndeye 1064nm uye 1550nm. Iyo PD ndeyephotodetector, uye kune rumwe rutivi rwefiber optic link, chiedza chinowanikwa nePIN photodiode yeanogamuchira, iyo inoshandura chiedza kuva chiratidzo chemagetsi uye ipapo mune yakajairika magetsi kugadzirisa danho. Iyo optical fiber inoshandiswa pakubatanidza yepakati inowanzova imwe-modhi uye yakawanda-modhi optical fiber. Single-mode fiber inowanzoshandiswa mumusana wetiweki nekuda kwekupararira kwayo kwakaderera uye kurasikirwa kwakaderera. Multimode fiber ine imwe application munharaunda yenzvimbo network nekuti yakachipa kugadzira uye inogona kugarisa akawanda kutapurirana panguva imwe chete. Iko kuderedzwa kwechiratidzo che optical mu fiber iduku zvikuru, chete ~ 0.25dB / km pa 1550nm.

Zvichienderana nehunhu hwekutapurirana mutsara uye kufambisa kwemaziso, ROF links ine zvinotevera tekinoroji zvakanakira:

• Kurasikirwa kwakanyanya, fiber attenuation isingasviki 0.4 dB / km

• Fiber ultra-bandwidth transmission, fiber kurasikirwa kwakasununguka kune frequency

• Batanidza nepamusoro pekutakura siginecha/bandwidth kusvika ku110GHz• Electromagnetic Interference (EMI) kuramba (kuipa kwemamiriro ekunze hakukanganise chiratidzo)

• Mutengo wakaderera pamita imwe • Fiber inonyanya kuchinjika uye isingaremi, inorema ingangoita 1/25 ye waveguide uye 1/10 yecoaxial tambo

• Kurongeka kuri nyore uye kunochinjika kwe electro-optic modulators (yezvokurapa uye nemakanika imaging system)