Fiber optics tau yog ib qho ntawm cov ncej tseem ceeb ntawm kev sib txuas lus niaj hnub. Nws muaj peev xwm sib txuas lus loj thiab sib kis tau ntev. Nws kuj muaj qhov zoo ntawm kev ua siab zoo thiab tiv thaiv kev cuam tshuam ntawm electromagnetic. Yog li, Yuav ua li cas raws nraim li fiber optics xa cov teeb liab kho qhov muag?
Kev hloov pauv ntawm cov teeb liab hluav taws xob rau cov teeb liab optical
Optical fiber yog cov cab kuj rau optical teeb liab kis tau tus mob. Thiab cov teeb liab kho qhov muag tau hloov pauv los ntawm cov teeb liab hluav taws xob. Cov cuab yeej uas tuaj yeem paub txog kev hloov hluav taws xob thiab kho qhov muag yog hu ua optical transmitter. Nyob rau hauv ib tug optical fiber system, optical transmitter yog lub teeb liab pib taw tes ntawm fiber optic kab.
Lub teeb mem tes teeb liab yog tsim los ntawm lub teeb emitting diode los yog lub laser txhaj. Los ntawm lub lens, the light pulse signal is concentrated into the fiber media, kom lub teeb mem tes kis tau raws txoj kab hauv cov xov xwm fiber ntau.
Fiber optic teeb liab kis tau tus mob
Kev xa tawm ntawm optical signals (optical teeb liab kis tau tus mob) yog ua tiav los ntawm lub hauv paus ntsiab lus ntawm tag nrho cov kev xav ntawm lub teeb. Thaum lub kaum sab xis ntawm qhov tshwm sim tshaj lub kaum sab xis tseem ceeb, lub teeb mem tes txav tau yooj yim raws kab ntawm fiber ntau optic los ntawm kev xav ntawm lub teeb.
Ob lub iav core thiab iav cladding muaj ib yam khoom muaj nqis, uas yog refractive index. Qhov no yog ib qho tseem ceeb parameter uas ntsuas qhov ceev ntawm lub teeb propagation los ntawm ib yam khoom. Txhawm rau kom lub system ua haujlwm zoo, lub cladding yuav tsum muaj ib tug me ntsis refractive Performance index tshaj qhov tseem ceeb. Qhov no txhais tau hais tias lub teeb tuaj yeem taug kev txhua txoj hauv kev los ntawm fiber ntau hauv txoj kev sawtooth.
Kev hloov pauv ntawm cov teeb liab kho qhov muag rau cov teeb liab hluav taws xob
Tom qab xa cov teeb liab kho qhov muag mus rau lwm qhov kawg ntawm qhov system ntawm optical fiber, lub teeb liab optical yuav tsum tau hloov mus rau hauv lub teeb liab hluav taws xob. Tsuas yog tom qab ntawd tuaj yeem siv ntau yam khoom siv network. Cov cuab yeej uas tuaj yeem ua txoj haujlwm no yog lub tshuab txais optical.
Lub ntsiab tivthaiv ntawm optical receiver yog photodetector. Qhov tseem ceeb tshaj plaws ntawm photodetector yog photodiode. Nws siv cov cov nyhuv photoelectric ntawm lub semiconductor kom txo cov teeb liab teeb liab mus rau lub teeb liab hluav taws xob. Tom qab ntawd lub teeb liab hluav taws xob yog amplified thiab tsim nyog hluav taws xob teeb liab yog tso tawm los ntawm lwm yam kev ua. Cov txheej txheem no ua rau kom rov kho cov teeb liab hluav taws xob nrog qhov tseem ceeb tsis muaj kev cuam tshuam.
Nyob rau hauv lub hnub nyoog ntawm Internet, optical signals yog ib txoj hauv kev tseem ceeb los ua cov ntaub ntawv xa mus. Cov ntaub ntawv xa mus rau hauv kev sib txuas lus ib txwm siv xov tooj ntawm tes thiab khoos phis tawj yog nyob rau hauv daim ntawv ntawm hluav taws xob teeb liab.
Nrog rau qhov yooj yim optical kev sib txuas lus system, ib lub voj voog uas muaj ib qho optical transmitter, optical receiver, thiab ib qho optical fiber tuaj yeem tsim tau. Optical repeaters, fiber-optic amplifiers thiab wavelength division multiplexers kuj tseem siv los xyuas kom meej cov teeb liab kis tau tus mob ntev (kis tau tus mob nyob deb nroog) zoo thiab nce kev sib kis bandwidth.
