Cov qauv thiab kev faib tawm ntawm cov tshuaj kho qhov muag

1. Cov qauv ntawm cov xim kho tshiab

IbKho Qhov Muag Fiber(Ntawm) yog pob tshab dielectric fiber siv rau kev taw qhia lub teeb. Ib qho kev siv hluav taws xob siv tau muaj ntau txheej ntawm cov pob tshab xov xwm, feem ntau muab faib ua peb txheej:

Lub hlwb: Nyob ntawm qhov chaw nruab nrab ntawm cov fiber ntau (txoj kab ntawm 5 ~ 80μm), phosphorus pentoxide) kom nce nws qhov ntsuas hluav taws xob tsis tuaj yeem ua kom nce (N1). Txog kev sib txuas lus fibers, cov tub ntxhais txoj kab uas hla yog 5 ~ {} hom fiber ntau) lossis 80 {}} hom fiber ntau).

Cladding: Nyob ib puag ncig cov tub ntxhais (txoj kab ~ 125μm), muaj ntawm cov docanes siab (piv txwv li ntawm qhov ntsuas me me (n2), qis me ntsis dua li tus tub ntxhais). Cov Cladding tuaj yeem yog tib lub tibz- txheej lossis ntau {{txheej.

Daim plhaub: Cov txheej txheej sab nraud (ua los ntawm acrylate, silicone roj hmab, lossis nylon), ua haujlwm pab tiv thaiv. Nws suav nrog thawj txheej thiab cov txheej txheem thib ob (lub tsho). Tom qab txheej, sab nraud uas hla ntawm cov fiber yog kwv yees li 1.5cm.

2. Kev faib tawm ntawm Optical Fibers

Muaj 4 txoj kev faib tawm hauv cov txheej txheem rau kho qhov muag; Lawv kuj tseem tuaj yeem raug cais tawm los ntawm kev sib xyaw (piv txwv li, silica fibers, fluoride {{3} muaj cov fibers, yas qoob, thiab lwm yam).

(1) Kev faib tawm los ntawm Refact Performance index profile ntawm fiber ntau hla {}}}}}

Muab faib uaKauj Ruam Performance Index Fiber (SF)thiabGraded Performance index fiber ntau (gif).

Kauj Ruam Performance Index Fiber ntau: Qhov ntsuas tsis pub dhau ntawm cov tub ntxhais thiab cladding yog uniform (nenoted \\ (n_1 \\) thiab \\) thiab \\ (n_1 \\)

Qhov no yog kev hloov fiber ntau, hloov maj mam hloov los ntawm graded index fibers, tab sis tau rov ua kom zoo li cov qauv tsim hauv ib qho {}} hom hom fibers.

GRADED Performance index fiber ntau: Lub chaw ntsuas hluav taws xob tshiab ntawm cov tub ntxhais ntxhais tseem ceeb, ua raws li kev cai lij choj rador (N2) ntawm cov tub ntxhais- cladding interface; Cov index ua kom cov cladding yog hnav khaub ncaws (n2)

Cov neeg siv hluav taws xob hluav taws xob tau hais tawm raws li:

Qhov twg: g yog cov ntsuas hluav taws xob ua kom tshiab; (A1) yog lub vojvoog loj; (Delta) yog cov txheeb ze cov kev ntsuas qhov txawv

Nta: txo cov qauv dispersion hauv ntau - hom fibers thiab nce kev kis tau.

(2) kev faib tawm los ntawm cov lej ntawm kev hais tawm hom

Muab faib uaNtau - hom fiber ntau (hli)thiabIb hom fiber ntau (smf).

Multi - hom fiber ntau: Rau qhov muab cov wavelength, ntau hom kis tau muaj nyob rau hauv cov fiber. Lub refractive index profile ntawm tus ntoo khaub lig {}} potyg multi}} bandwidth muaj peev xwm, nqaim} bandwidth, me me kis lub peev xwm.

Ib hom fiber ntau: Rau qhov muab cov kev ua haujlwm ua haujlwm, tsuas yog ib hom kev sib kis (qhov tseem ceeb tshaj plaws {{hom kev sib tw, haum rau he} kev kis ceev.

(3) Kev faib tawm los ntawm kev ua haujlwm nthwv dej wavelength

Muab faib uaLuv - wavelength fibersthiabNtev - wavelength fibers.

Luv - wavelength fibers: Nthwv dej 0.6 ~ 0.9μm (tus nqi raug 0.85μm), ib qho khoom thaum ntxov, tsis tshua muaj siv tam sim no.

Ntev - wavelength fibers: Nthwv cua 1.0 ~ 2.0μm (Cov tseem ceeb 1.31μm, 1.5555μm). Nyob rau hauv pawg no, Silica cov khoom muaj tsawg dua cov khoom siv thiab cov ntawv me me: qis} deb, loj {7} {7} {7} {7} {7} {7} {7} kev sib txuas lus muaj peev xwm.

(4) Kev faib tawm los ntawm Jua Tsho Ntaus

Muab faib uaNruj -} buffered fibersthiab{- Raj Raj Fibers.

Nruj -} buffered fibers: Cov txheej txheem thib ob thiab qib siab thiab cov txheej txheem tertiary tau sib khi ua ke rau cov txheej txheem loj heev tom qab cov khoom siv kub thiab txias (cov kab mob kub

{- Raj Raj Fibers: Lub pre {-} co coated fiber ntau yog xoob nyob rau hauv lub yas yas lossis tertibry txheej.Advantages: yooj yim tsim qauv; Zoo dua attenuation - cov yam ntxwv kub thiab txias dua {{l}}} buffered fibers, nce ntxiv.