Cov Qauv Tseem Ntawm Optical Fiber
Ib qho kho cov fiber ntau muaj peb txheej:
Cov tub ntxhais: txheej hauv plawv ua los ntawm high-purity silica (doped nrog cov ntsiab xws li germanium). Nws muaj lub qhov loj me me (8-10 μm rau ib-hom fiber ntau,}}}}. 5μm rau ntau hom fiber ntau) thiab kev ntsuas siab dua tshiab.
Cladding: Nyob ib puag ncig cov tub ntxhais, ua los ntawm cov khoom siv nrog qis qis dua qhov tseem ceeb tshaj qhov tseem ceeb. Qhov no ua kom pom tseeb lub teeb kev nthuav dav ntawm kev cuam tshuam tag nrho hauv kev xav.
Kev Tiv Thaiv Txheej Txheem: ib txheej txheej polymer polymer kom tiv thaiv kev puas tsuaj lub cev thiab ib puag ncig kev cuam tshuam.
Tub ntxhais lub hauv paus: Kev ua rau kev xav tau tag nrho
Refacking Index sib piv: Cov ntsiab lus siab dua tshiab index piv rau lub teeb pom kev ua rau muaj kev cuam tshuam nrog kev ua tub sab hauv qab thaum muaj ntau dua qhov sib tw.
Kev Tshaj Tawm Lub Teeb: Lub teeb pom kev zoo mus los ntawm cov tseem ceeb ntawm kev xav tau tag nrho kev xav tau, tom qab hom Zigzag (muaj ntau-hom-ncaj).
Cov kauj ruam ntawm cov ntaub ntawv kis tau
Hloov dua tshiab ntawm hluav taws xob teeb tsa rau lub cim kho kho qhov muag:
Ntawm lub transmitter, A ** Laser Diode (LD) ** lossis lub teeb ci ntsa iab cov cim rau hauv cov kab mob hluav taws xob (") lossis nthwv dej" thiab "{2} s").
Kev Tshaj Tawm Qhov Ntsuas OCEARTAL:
Lub teeb pulses propagate los ntawm cov fiber. Cov ntsiab lus kom raug ntsuas qhov sib txawv ntawm cov tub ntxhais thiab cladding confines lub teeb liab mus rau tus tseem ceeb, txawm tias lub fiber yog khoov.
Teeb Liab Repeater / Amplification:
Rau kev sib kis tau deb-deb, ** Erbium-doped fiber ntau amplifasciers (EDFAS) ** Amplify Optical cim ncaj qha tsis txhob hloov hluav taws xob, txo cov cim hluav taws xob, txo cov cim hluav taws xob.
Cov teeb liab-rau-hluav taws xob teeb liab hloov dua siab tshiab:
Ntawm tus txais, A ** photodetector ** (piv txwv li, avalanche photodiode) hloov lub teeb rov qab mus rau hauv cov ntaub ntawv hluav taws xob, uas yog tom qab ntawd tau txiav txim siab rau cov ntaub ntawv qub.
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Fiber ntau hom thiab ua tau zoo
Ib-hom fiber ntau (smf):
- Ultra-nyias cov tub ntxhais (8-10 μm), cia tsuas muaj ib lub teeb pom kev.
- Advantages: Long-distance transmission (>100 km), high bandwidth. Siv hauv pob txha caj qaum (piv txwv li, undersea cables).
Ntau hom fiber ntau (hli):
- tuab dua core ({50-62. 5μm), txhawb ntau hom teeb.
- Cov tsis zoo: Modal Dispersion Txwv Kev Sib Kis Deb (<2 km). Ideal for local networks (e.g., LANs).
Qhov zoo ntawm fiber ntau optics
Huab bandwidth: theoretical kev ceev txog li ntau pua tus TBPS (siv wavelength-faib multipxing).
Tsawg attenuation: niaj hnub cov fibers ua yeeb yam poob li 0. 2 db / k}}
Kev tiv thaiv kab mob rau EMI: tsis muaj kev cuam tshuam los ntawm hluav taws xob kev cuam tshuam, haum rau cov chaw hnyav (piv txwv li cov zog, tsev kho mob).
Kev cog lus me thiab ruaj ntseg: lub teeb yuag, loj me me, thiab tsis muaj hluav taws xob hluav taws xob.
Cov kev sib tw ua haujlwm
Kev faib tawm: Cov paib ntsuas vim muaj kev sib txawv ntawm lub teeb wavelength / hom kev faib tawm (DSP).
Nonlinear Teeb Meem: Cov cim hluav taws xob siab uas ua rau muaj kev sib xyaw plaub-plaub-yoj sib xyaw, xav tau kev tswj hwm lub zog.
Khoov poob poob: ntau dhau los khoov rau lub teeb taj; Qhov tsawg kawg nkaus khoov radius yuav tsum tau tswj kom tswj tau thaum lub teeb tsa.
Cov Ntawv Thov
Telecom Teschs: Internet Backbones, 5G Chaw Muag Khoom Muag Chaw Nres, Cov Ntaub Ntawv Chaw Sib Koom Tes.
Kho mob: Endoscopic kev ua yeeb yaj kiab, laser phais laser.
Muaj: Fiber ntau sensors (kub, siab), fiber ntau lasers.
Lub ntsiab
Fiber Optics Optics xa cov ntaub ntawv los ntawm kev kaw lub teeb pom kev zoo nyob rau hauv ib tug tseem ceeb ntawm kev xav tag nrho hauv sab hauv. Leveruling Lub Teeb lub siab, lawv pab tau ultra-ceev, ntev ntev, thiab kev sib txuas lus tsis muaj zog. Cov thev naus laus zis tseem ceeb suav nrog kev tswj hwm cov teeb pom kev zoo, kev siv hluav taws xob kho kom zoo, thiab kev hloov kho lub ntsej muag ntawm cov tshuab sib txuas lus niaj hnub.