Nkwurịta okwu fiber optic, dị ka otu n'ime isi ogidi nke nzikọrịta ozi nke oge a, na-arụ ọrụ dị mkpa na netwọk mgbasa ozi ọgbara ọhụrụ.
Enwere ike ịtụ anya usoro mmepe nke nkwukọrịta fiber optic site na akụkụ ndị a.
1.In iji ghọta na-abawanye ikike ozi na nnyefe dị anya, a ghaghị iji eriri otu-mode nwere obere ọnwụ na obere mgbasa ozi. Ugbu a, G.652 ot otu-mode ngwa anya eriri ọtụtụ ebe na-eji na nkwurịta okwu netwọk ngwa anya cable ahịrị. Ọ bụ ezie na eriri a nwere opekempe mfu nke 1.55 μm, ọ nwere nnukwu uru mgbasa nke ihe dịka 18 ps / (nm.km). A na-ekwu na mgbe a na-eji eriri otu ụdị ejiji eme ihe n'ogologo nke 1.55 μm, ọrụ nnyefe adịghị mma.
Ọ bụrụ na efu-dispersion wavelength na-gbanwee si 1.31 μm ka 1.55 μm, ọ na-akpọ dispersion-shifted eriri (DSF), ma mgbe a eriri na erbium-doped fiber amplifier (EDFA) na-eji na a wavelength nkewa multiplexing usoro (WDM) , ọ ga-N'ihi na-abụghị linearity nke eriri, anọ-efegharị Ịgwakọta emee, nke na-egbochi nkịtị ojiji nke WDM, nke pụtara na efu eriri dispersion adịghị mma maka WDM.
Ka teknụzụ nkwurịta okwu fiber optical na-arụ ọrụ nke ọma na usoro WDM, a ga-ebelata mgbasa nke eriri, mana ekweghị ka ọ bụrụ efu. Ya mere, ọhụrụ otu-mode eriri e mere na-akpọ na-abụghị efu dispersion eriri (NZDF), nke ranges si 1.54 ~ The dispersion uru na 1.56μm nso nwere ike nọgidere na-enwe na 1.0 ~ 4.0ps / (nm.km), nke na-ezere. mpaghara mgbasa ozi efu, mana ọ na-ejigide obere uru mgbasa ozi.
Ọtụtụ ihe atụ ka akọpụtala n'ihu ọha site na iji sistemụ mgbasa ozi EDFA/WDM nke NZDF.
2.Photonic ngwaọrụ eji na ngwa anya fiber nkwurịta okwu usoro nwekwara mepụtara budata na-adịbeghị anya. Iji gboo mkpa nke sistemu WDM, e mepụtala ngwaọrụ isi iyi multi-wavelength (MLS) n'afọ ndị na-adịbeghị anya. Ọ na-emekarị ndokwa multiple laser tubes n'usoro na-eme ngwakọ integrated ngwa anya akụrụngwa na kpakpando coupler.
N'ihi na-nata ọgwụgwụ nke ngwa anya eriri nkwurịta okwu usoro, ya photodetector na preamplifier na-tumadi mepụtara na ntụziaka nke elu-ọsọ ma ọ bụ obosara-band nzaghachi. Photodiodes PIN ka nwere ike iru ihe achọrọ ka emeziwanye ya. Maka brọdband fotodetectors eji na ogologo wavelength 1.55μm band, a metal semiconductor-metal photodetection tube (MSM) ka emepụtara na-adịbeghị anya. Igwe na-eme njem na-ekesa ihe nchọpụta foto. Dị ka akụkọ si kwuo, MSM a nwere ike ịchọpụta 78dB nke bandwit ugboro ugboro 3dB maka ebili mmiri ọkụ 1.55μm.
O yikarịrị ka ọ ga-eji nnukwu transistor mobility transistor (HEMT) dochie FET preamplifier. A na-akọ na 1.55μm optoelectronic receiver na-eji ihe nchọpụta MSM na usoro HEMT pre-amplified optoelectronic integration (OEIC) nwere eriri ugboro nke 38GHz ma na-atụ anya iru 60GHz.
3. Usoro mgbasa ozi PDH nke na-ebute n'isi na usoro nkwurịta okwu fiber optical enwebeghị ike ime mgbanwe maka mmepe nke netwọk mgbasa ozi nke oge a. Ya mere, mmepe nke ngwa anya eriri nkwurịta okwu kwupụta ịkparịta ụka n'Ịntanet aghọwo ihe na-apụghị izere ezere omume.
SDH bụ iwu netwọkụ mgbasa ozi ọhụrụ nwere njirimara bụ isi nke ịkparịta ụka n'Ịntanet. Ọ bụ netwọk ozi zuru oke nke na-ejikọta multiplexing, nnyefe ahịrị na ọrụ mgbanwe ma nwee ikike njikwa netwọk siri ike. A na-eji ya eme ihe ugbu a.