Imibuzo Evame Ukubuzwa Nge-Optical Fiber: Imibuzo Nezimpendulo Ezisheshayo
Njengesigaba esikhulu somkhiqizo, i-optical fiber ihilela ulwazi olubanzi lobuchwepheshe. Lesi sihloko sethula imiqondo eyinhloko ngefomethi ye-Q&A esheshayo ukuze kube lula ukubhekisela kuyo.
1. Yimaphi amapharamitha ayisisekelo asetshenziswa ukuchaza izici zokudlulisela zesixhumanisi sefayibha yokukhanya?
Impendulo:Amapharamitha ayinhloko afaka phakathi ukuncishiswa, ukusabalala, i-bandwidth, ubude be-cutoff, kanye nobubanzi bensimu yemodi (MFD).
2. Yini ebangela ukuncishiswa kwe-optical fiber?
Impendulo:Ukuncishiswa kwe-optical fiber kubhekisela ekunciphiseni kwamandla okukhanya phakathi kwezingxenye ezimbili ze-fiber futhi kuyahlukahluka ngokuya ngobude be-wavelength. Izimbangela eziyinhloko ukuhlakazeka, ukumuncwa, kanye nokulahlekelwa yi-optical okuvela ezixhumini kanye nama-splices.
3. Ichazwa kanjani i-coefficient yokunciphisa i-fiber ye-optical?
Impendulo:Ichazwa njengokunciphisa ubude beyunithi ngayinye yefayibha yokukhanya efanayo ngaphansi kwezimo ezizinzile, ngokuvamile ezivezwa ku-dB/km.
4. Yiziphi izici ezibangela umsindo ezinhlelweni zokuxhumana nge-optical fiber?
Impendulo:Imithombo yomsindo ihlanganisa:
- Umsindo obangelwa isilinganiso sokuphela esinganele
- Ukuguquguquka kwamandla okukhanya okungahleliwe
- Umsindo we-jitter wesikhathi
- Umsindo wokudutshulwa nomsindo wokushisa kumukeli
- Umsindo we-modal ku-fiber
- Umsindo ovela ekukhuleni kwenhliziyo okubangelwa ukuhlakazeka
- Umsindo wokuhlukanisa imodi kuma-diode e-laser (ama-LD)
- Umsindo wokukhala kwemvamisa kuma-LD
- Umsindo obangelwa ukuzindla
5. I-bandwidth ye-optical fiber ihlobene nani?
Impendulo:I-bandwidth yefayibha ibhekisela ku-modulation frequency lapho i-amplitude yamandla okukhanya yehla khona ngo-50% (noma u-3 dB) kusuka enanini layo le-zero-frequency emsebenzini wokudlulisa ifayibha. I-bandwidth yefayibha cishe ilingana nobude befayibha, futhi umkhiqizo wobude be-bandwidth uhlala ungaguquki.
Isibonelo Somkhiqizo: Ikhebula le-LC kuya ku-SC Duplex OM3 50/125 Multimode Fiber Patch, iJacket ye-LSZH
6. Zingaki izinhlobo zokusabalala kwefayibha ezikhona, futhi zihlobene nani?
Impendulo:Ukusabalala kwefayibha kuhlanganisa:
- Ukuhlakazeka kwe-Modal
- Ukuhlakazeka kwezinto ezibonakalayo
- Ukuhlakazeka kwe-waveguide (kwesakhiwo)
Ukuhlakazeka kuncike kokubili ezicini zomthombo we-optical kanye ne-fiber uqobo.
7. Izici zokusabalala kwezibonakaliso ezisakazeka ku-optical fiber zingachazwa kanjani?
Impendulo:Zingachazwa kusetshenziswa amapharamitha amathathu angokomzimba:
- Ukwanda kwe-pulse
- Umkhawulokudonsa wefayibha
- Isilinganiso sokuhlakazeka
8. Iyini ubude be-wavelength obunqunyiwe?
Impendulo:Ubude be-cutoff buyi-wavelength emfushane kakhulu lapho imodi eyisisekelo kuphela engasakazeka khona ku-fiber. Kuma-fiber emodi eyodwa, ubude be-cutoff kumele bube bufushane kunobude be-wavelength obusebenzayo.
9. Ukusabalala kwefayibha kuthinta kanjani ukusebenza kohlelo lokuxhumana?
Impendulo:Ukuhlakazeka kubangela ukuthi ama-optical pulses ande ngesikhathi sokudluliselwa, okuthinta:
- Izinga lephutha le-Bit (BER)
- Ibanga lokudlulisela
- Isivinini sokudlulisa uhlelo
10. Iyiphi indlela yokusabalalisa emuva?
Impendulo:Indlela yokusabalalisa emuva ilinganisa ukuncishiswa kobude befayibha. Nakuba amandla amaningi okukhanya ehamba phambili, ingxenye encane ihlakazeke emuva ibheke kumshini wokudlulisa. Ngokubheka isignali esakazeke emuva ngokuhamba kwesikhathi, kungenzeka ukukala:
- Ubude befayibha
- Ukunciphisa ifayibha
- Ukungahambi kahle kwendawo
- Amaphuzu okuphumula
- Ukulahlekelwa kuma-splices kanye nezixhumi
Isibonelo Somkhiqizo: Ikhebula le-MPO 24-Pin kuya ku-3×MPO 8-Pin OM4 50/125μm Multimode Fiber, iJacket ye-LSZH, i-Aqua
11. Iyini indawo efile ye-OTDR, futhi ikuthinta kanjani ukuhlolwa?
Impendulo:I-OTDR (i-Optical Time Domain Reflectometer) isebenzisa ukukhanya okusakazeke ngemuva okukhiqizwa ngesikhathi sokudlulisa ukukhanya ukuze kutholakale ulwazi lokunciphisa ukukhanya. Isetshenziselwa ukukala ukuncipha kwefayibha, ukulahlekelwa kwe-splice, indawo yephutha, kanye nokusatshalaliswa kokulahlekelwa kusixhumanisi sefayibha.
Amapharamitha abalulekile okusebenza kwe-OTDR afaka:
- Ububanzi obuguqukayo
- Ukuzwela
- Isixazululo
- Isikhathi sokulinganisa
- Indawo efile
Indawo efile yisigaba esilandela ngokushesha umcimbi wokuzindla onamandla lapho i-OTDR ingakwazi ukubona noma ukuxazulula ngokunembile izehlakalo ezilandelayo. Ekuhlolweni okungokoqobo, imicu yokuqalisa kanye nemicu yokwamukela ivame ukusetshenziswa ukunciphisa umthelela wezindawo ezifile.
12. Imicu yokukhanya ihlukaniswa kanjani ngokwe-refractive index distribution?
Impendulo:Imicu ye-Optical ihlukaniswe ngezigaba ezilandelayo:
- Imicu ye-Step-index
- Imicu ye-graded-index
Imicu ye-Step-index ine-bandwidth encane futhi ifanelekela ukuxhumana okunomthamo ophansi, ibanga elifushane. Imicu ye-graded-index inikeza i-bandwidth ebanzi futhi ifanelekela izinhlelo zokuxhumana ezinomthamo ophakathi nophezulu.
13. Imicu yokukhanya ihlukaniswa kanjani ngokwezindlela zokudlulisa?
Impendulo:Ama-fiber ahlukaniswe kanje:
I-Fiber Yemodi Eyodwa (i-SMF)
- Ububanzi be-core: cishe 1–10 μm
- Isekela imodi eyisisekelo kuphela
- Ifanelekela ukudluliswa kwebanga elide nomthamo ophezulu
I-Multimode Fiber (MMF)
- Ububanzi be-core: cishe 50–60 μm
- Isekela izindlela eziningi zokusabalalisa
- Ukusebenza kokudlulisa okuphansi kune-SMF
Ezinhlelweni zokuvikela zamanje ezihlukile ezisebenzisa iziteshi zokuvikela ezihlanganisiwe, imicu yemodi eminingi ivame ukusetshenziswa phakathi kwemishini yokuguqula i-photoelectric egumbini lokuxhumana kanye namadivayisi okuvikela egumbini lokulawula.
14. Kuyini ukubaluleka kwe-Numerical Aperture (NA) ye-fibre ye-step-index?
Impendulo:I-Numerical Aperture (NA) ikhombisa ikhono lokuqoqa ukukhanya le-fiber. Uma i-NA inkulu, ikhono le-fiber lokuqoqa ukukhanya okungenayo liqina kakhulu.
15. Kuyini i-birefringence kuma-fiber optical e-single-mode?
Impendulo:Imicu yemodi eyodwa isekela izindlela ezimbili ze-orthogonal polarization. Uma i-fiber ingalingani ngokuphelele nge-cylindrical, izindlela ezimbili ze-polarization zizoba nezinkomba ze-refractive ezihlukile. Umehluko omkhulu phakathi kwalezi zinkomba ze-refractive waziwa ngokuthi i-birefringence.
Umkhiqizo Oyisibonelo: Ikhebula le-OM5 50/125 Multimode Fiber Optic, i-Dual LC kuya ku-Dual LC, 5 m, iJacket ye-OFNR Zipcord
16. Yimiphi imikhawulo yokugoba kwamakhebula e-optical?
Impendulo:Irediyasi yokugoba kufanele ibe:
- OkungenaniIzikhathi ezingu-20ububanzi bangaphandle bekhebula ngaphansi kwezimo ezimile
- OkungenaniIzikhathi ezingu-30ububanzi bangaphandle bekhebula ngesikhathi sokufakwa noma ukunyakaza
17. Yini okufanele icatshangelwe kumaphrojekthi ekhebula le-ADSS optical?
Impendulo:Izinto ezintathu ezibalulekile okufanele uzicabangele kwezobuchwepheshe yilezi:
- Umklamo wemishini wekhebula le-optical
- Ukunqunywa kwamaphuzu okumiswa
- Ukukhetha nokufaka izinto zehadiwe ezifanayo
18. Yiziphi izimiso ezimbili zokusebenza ezibaluleke kakhulu zezixhumi ze-fiber optic?
Impendulo:Izixhumi ze-fiber optic (ezivame ukubizwa ngokuthi izixhumi ze-patch) zihlolwa ngokuyinhloko yi:
- Ukulahlekelwa Kokufakwa (IL)
- Ukulahlekelwa Kokubuyiselwa (RL)
19. Kuyini ukulahlekelwa kokufakwa kusixhumi se-fiber optic?
Impendulo:Ukulahlekelwa kokufakwa kubhekisela ekunciphiseni kwamandla adluliswayo asebenzayo okubangelwa ukwethula isixhumi endleleni yokukhanya. Ukulahlekelwa kokufakwa okuphansi kuyathandwa. Ngokwezincomo ze-ITU-T, ukulahlekelwa kokufakwa ngokuvamile akufanele kudlule0.5 dB.
20. Kuyini ukulahlekelwa kokubuya (ukuncipha kokukhanya) kusixhumi se-fiber optic?
Impendulo:Ukulahleka kokubuya kulinganisa inani lamandla okukhanya abonakalayo abuya ngesiteshi sokufaka ngenxa yokubonakaliswa kwesixhumi. Ukulahleka kokubuya okuphezulu kubonisa ukusebenza okungcono, ngenani elijwayelekile le25 dB noma ngaphezulu.
Isikhathi sokuthunyelwe: Juni-04-2026