Iindaba

1. Chaza amacandelo e-optical fibers.

A: I-fiber optical ineendawo ezimbini ezisisiseko: i-core kunye ne-cladding eyenziwe ngezinto ezibonakalayo ezibonakalayo kunye ne-coating layer.

2. Ziziphi iiparamitha ezisisiseko ezichaza iimpawu zokudluliselwa kwemigca yefiber optical?

A: kubandakanywa ilahleko, ukusasazwa, i-bandwidth, i-cutoff wavelength, i-diameter ye-mode field, njl.

3. Ziziphi izizathu zokuthotywa kwefiber optical?

A: I-fiber optical attenuation ibhekisela ekunciphiseni amandla okukhanya phakathi kwamacandelo amabini anqamlezayo e-fiber optical, ehambelana nobude be-wavelength.Izizathu eziphambili zokuthotywa zisasazeka, ukufunxa kunye nokulahleka kwe-optical ngenxa yezihlanganisi kunye nezixhumi.

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

A: Ichazwa ngokunciphisa ubude beyunithi yefiber efanayo kwindawo ezinzileyo (dB / km).

5. Yintoni ilahleko yokufaka?

A: Ukunciphisa okubangelwa kukufakelwa kwecandelo le-optical (njengekhonkco okanye i-coupler) kumgca wothumelo obonakalayo.

6. Yintoni i-bandwidth yefiber optical enxulumene nayo?

A: i-bandwidth ye-fiber optical ibhekisela kwi-modulation frequency apho i-amplitude yamandla optical iyancipha nge-50% okanye i-3dB ukusuka kwi-amplitude ye-frequency zero kumsebenzi wokudlulisa i-fiber optical.I-bandwidth ye-fiber optical iphantse ihambelane nobude bayo, kwaye imveliso yobude be-bandwidth ihlala njalo.

7. Zingaphi iindidi zokusasazwa ezikhoyo kwifiber optical?Ngantoni?

A: Ukusasazwa kwefiber optical kubhekisa ekwandiseni ukulibaziseka kweqela kwifiber ebonakalayo, kubandakanywa ukusasazwa kwemowudi, ukusasazwa kwezinto kunye nokusasazwa kwesakhiwo.Kuxhomekeke kwiimpawu zomthombo wokukhanya kunye nefiber optical.

8. Indlela yokuchaza iimpawu zokusasazeka kweempawu zokusasazwa kwifiber optical?

Impendulo: inokuchazwa ngamanani amathathu omzimba: ukwanda kwe-pulse, i-fiber optical bandwidth kunye ne-fiber optical dispersion coefficient.

9. Yintoni i-cutoff wavelength?

A: Ibhekisa kobona bude bufutshane kwifiber ebonakalayo enokuqhuba kuphela eyona ndlela ibalulekileyo.Kwimicu yemowudi enye, i-cutoff wavelength kufuneka ibemfutshane kunobude bokukhanya okuhanjiswayo.

10. Ithini impembelelo yokusasazwa kwefiber optical ekusebenzeni kwenkqubo yonxibelelwano lwefiber optical?

A: Ukusasazwa kwefiber kuya kwandisa i-optical pulse njengoko ihamba ngefiber.Ichaphazela ubungakanani besantya sempazamo encinci, kunye nobude bomgama wothumelo, kunye nobungakanani besantya senkqubo.

Ukwandiswa kwee-optical pulses kwi-optical fibers okubangelwa yi-velocities yeqela elihlukeneyo le-wavelengths eyahlukeneyo kumacandelo e-spectral yomthombo wokukhanya.

11. Yintoni ukusasazwa ngasemva?

A: I-backscattering yindlela yokulinganisa i-attenuation kunye nobude be-fiber optical.Uninzi lwamandla okukhanya kwifiber aqhubela phambili, kodwa incinci yawo isasazeke ngasemva ukuya kwisibane.Ixesha elijikayo le-backscattering lingabonwa ngokusebenzisa i-optical splitter kwisixhobo se-luminescence.Kwesinye isiphelo, kungekhona nje ubude kunye nokunciphisa i-fiber edibeneyo edibeneyo inokulinganiswa, kodwa kunye nokungahambi kakuhle kwendawo, i-breakpoint kunye nokulahlekelwa kwamandla optical okubangelwa umdibaniso kunye nokudibanisa kunokulinganiswa.

12. Uthini umgaqo wovavanyo we-optical time domain reflectometer (OTDR)?Yintoni umsebenzi wayo?

Impendulo: I-OTDR esekelwe ekukhanyeni kwe-backscattering kunye ne-Fresnel reflection umgaqo-siseko, xa ukusetyenziswa kwe-propagation yokukhanya kwi-fiber optical attenuation yokukhanya kwe-backscatter ukufumana ulwazi, ingasetyenziselwa ukulinganisa i-optical attenuation, ilahleko ye-splicing, i-fiber optic fault pointing kunye nokuqonda isimo. yokusabalalisa ilahleko kunye nobude befiber optical, njl., yinxalenye ebalulekileyo yokwakhiwa kwentambo ye-fiber optic, ukugcinwa kunye nezixhobo zokubeka iliso.Iiparamitha zayo eziphambili ziquka uluhlu oluguquguqukayo, uvakalelo, isisombululo, ixesha lokulinganisa kunye nommandla oyimfama.