Izindaba

1. Chaza izingxenye zemicu optical.

A: I-optical fibre iqukethe izingxenye ezimbili eziyisisekelo: i-core kanye ne-cladding eyenziwe ngezinto ezibonakalayo ezibonakalayo kanye nongqimba olunamathelayo.

2. Yimaphi amapharamitha ayisisekelo achaza izici zokudlulisela zemigqa ye-fiber optical?

IMP: kufaka phakathi ukulahlekelwa, ukuhlakazeka, umkhawulokudonsa, ubude begagasi be-cutoff, ububanzi benkambu yemodi, njll.

3. Yiziphi izimbangela zokuncipha kwefiber optical?

A: I-Optical fibre attenuation ibhekisela ekuncishisweni kwamandla okubona phakathi kwezingxenye ezimbili eziphambanayo ze-fiber optical, okuhlobene nobude beza.Izimbangela eziyinhloko zokunciphisa ukuhlakazeka, ukumuncwa kanye nokulahlekelwa kokubona ngenxa yezixhumi nezixhumi.

4. Ichazwa kanjani i-coefficient yokunciphisa i-fiber optical?

A: Kuchazwa ukuncishiswa kweyunithi ngayinye yobude befayibha eyunifomu esesimweni esizinzile (dB/km).

5. Kuyini ukulahlekelwa kokufaka?

A: Ukuncipha okubangelwa ukufakwa kwengxenye ye-optical (efana nesixhumi noma i-coupler) emugqeni wokudlulisa amehlo.

6. Iyini i-bandwidth yefibre optical ehlobene nayo?

A: umkhawulokudonsa we-fiber optical ubhekisela ekuvaleni kokuguquguquka lapho i-amplitude yamandla optical iyancipha ngo-50% noma i-3dB kusukela ku-amplitude ye-frequency zero emsebenzini wokudlulisa we-fiber optical.I-bandwidth ye-fiber optical icishe ilingane ngokuphambene nobude bayo, futhi umkhiqizo wobude bomkhawulokudonsa uhlala njalo.

7. Zingaki izinhlobo zokuhlakazeka ezikhona kufiber optical?Ngani?

A: Ukuhlakazwa kwefiber optical kubhekisela ekwandiseni ukubambezeleka kweqembu ku-fiber optical, okuhlanganisa ukuhlakazeka kwemodi, ukuhlakazeka kwezinto ezibonakalayo kanye nokuhlakazeka kwesakhiwo.Kuncike ezicini zomthombo wokukhanya kanye ne-fiber optical.

8. Ungazichaza kanjani izici zokuhlakazeka zokusabalalisa isignali ku-fiber optical?

Impendulo: ingachazwa ngamanani angokwenyama amathathu: ukunwetshwa kwe-pulse, i-optical fiber bandwidth kanye ne-optical fiber dispersion coefficient.

9. Yini i-cutoff wavelength?

A: Isho ubude begagasi obufushane kakhulu ku-fiber optical ekwazi ukuqhuba imodi eyisisekelo kuphela.Kumafayibha emodi eyodwa, ubude begagasi be-cutoff kumele bube bufushane kunobude begagasi bokukhanya okudlulisiwe.

10. Imuphi umthelela ukuhlakazwa kwefiber optical kunawo ekusebenzeni kohlelo lokuxhumana lwefiber optical?

A: Ukuhlakazwa kwe-fiber kuzokhulisa i-optical pulse njengoba ihamba ngefayibha.Ithinta usayizi wesilinganiso sephutha elincane, nobude bebanga lokudlulisela, kanye nosayizi wesivinini sesistimu.

Ukunwetshwa kwama-optical pulses kuma-optical fibers okubangelwa ama-velocities eqembu ahlukene amaza ahlukene ezingxenyeni ze-spectral zomthombo wokukhanya.

11. Kuyini ukuhlakazeka emuva?

A: I-Backscattering iyindlela yokulinganisa ukuncipha ngobude be-fiber optical.Amandla amaningi okubona ku-fiber asakazekela phambili, kodwa amancane awo ahlakazeka abheke kusikhanyisi.Ijika lesikhathi le-backscattering lingabonwa ngokusebenzisa i-optical splitter kudivayisi ye-luminescence.Ngakolunye uhlangothi, ubude nokunciphisa i-fiber ehlanganisiwe ehlanganisiwe kungalinganiswa, kodwa futhi ukungahambi kahle kwendawo, i-breakpoint kanye nokulahlekelwa kwamandla optical okubangelwa isixhumi nesixhumi kungalinganiswa.

12. Uyini umgomo wokuhlola we-optical time domain reflectometer (OTDR)?Inamuphi umsebenzi?

Impendulo: I-OTDR esekelwe ekukhanyeni kwe-backscattering kanye nesimiso sokubonisa i-Fresnel, lapho ukusetshenziswa kokusabalalisa ukukhanya ku-fiber optical attenuation yokukhanya kwe-backscatter ukuze uthole ulwazi, ingasetshenziselwa ukulinganisa ukuncipha kwe-optical, ukulahlekelwa kwe-splicing, ukubeka iphutha le-fiber optic nokuqonda isimo. ukusatshalaliswa kokulahlekelwa ngobude be-fiber optical, njll., kuyingxenye ebalulekile yokwakhiwa kwekhebula le-fiber optic, amathuluzi okunakekela kanye nokuqapha.Imingcele yayo eyinhloko ihlanganisa ububanzi obuguquguqukayo, ukuzwela, ukulungiswa, isikhathi sokulinganisa nendawo eyimpumputhe.