Xov xwm

1. Piav txog cov khoom ntawm optical fibers.

A: Cov khoom siv kho qhov muag muaj ob qhov tseem ceeb: lub hauv paus thiab cladding ua los ntawm cov ntaub ntawv pob tshab thiab txheej txheej.

2. Dab tsi yog qhov tseem ceeb uas piav qhia txog kev sib kis ntawm cov kab hluav taws xob kho qhov muag?

A: suav nrog kev poob, dispersion, bandwidth, cutoff wavelength, hom teb txoj kab uas hla, thiab lwm yam.

3. Dab tsi yog qhov ua rau optical fiber attenuation?

A: Optical fiber attenuation yog hais txog qhov txo qis ntawm lub zog kho qhov muag nruab nrab ntawm ob ntu ntawm cov khoom siv kho qhov muag, uas cuam tshuam nrog wavelength.Lub ntsiab ua rau attenuation yog tawg, nqus thiab optical poob vim cov connectors thiab connectors.

4. Lub attenuation coefficient ntawm optical fiber ntau txhais li cas?

A: Nws yog txhais los ntawm qhov attenuation rau ib chav tsev ntev ntawm ib qho fiber ntau nyob rau hauv ib qho chaw ruaj khov (dB / km).

5. Dab tsi yog qhov poob qis?

A: Attenuation tshwm sim los ntawm kev ntxig ntawm cov khoom siv kho qhov muag (xws li cov khoom sib txuas lossis cov khoom sib txuas) rau hauv cov kab hluav taws xob kho qhov muag.

6. Dab tsi yog bandwidth ntawm optical fiber cuam tshuam?

A: bandwidth ntawm optical fiber yog hais txog qhov kev hloov pauv zaus uas qhov amplitude ntawm lub hwj chim kho qhov muag raug txo los ntawm 50% lossis 3dB los ntawm amplitude ntawm xoom zaus hauv kev hloov pauv ntawm cov khoom siv kho qhov muag.Lub bandwidth ntawm fiber ntau optical yog kwv yees li qhov sib npaug ntawm nws qhov ntev, thiab cov khoom ntawm qhov ntev bandwidth yog qhov tsis tu ncua.

7. Muaj pes tsawg hom dispersion muaj nyob rau hauv optical fiber?Nrog dab tsi?

A: Dispersion ntawm optical fiber yog hais txog kev nthuav dav ntawm pab pawg qeeb hauv kev kho qhov muag fiber ntau, suav nrog hom dispersion, khoom dispersion thiab cov qauv dispersion.Nws nyob ntawm tus yam ntxwv ntawm lub teeb ci thiab optical fiber.

8. Yuav piav qhia txog cov yam ntxwv dispersion ntawm cov teeb liab propagation hauv optical fiber ntau li cas?

Teb: nws tuaj yeem piav qhia los ntawm peb lub cev: pulse broadning, optical fiber bandwidth thiab optical fiber dispersion coefficient.

9. Dab tsi yog qhov txiav tawm wavelength?

A: Nws hais txog qhov luv tshaj wavelength nyob rau hauv ib qho kev kho qhov muag fiber ntau uas tuaj yeem ua qhov tseem ceeb ntawm hom.Rau ib hom fibers, qhov txiav tawm wavelength yuav tsum luv dua lub wavelength ntawm lub teeb kis.

10. Dab tsi cuam tshuam qhov dispersion ntawm optical fiber ntau rau kev ua haujlwm ntawm optical fiber kev sib txuas lus?

A: Lub dispersion ntawm fiber ntau yuav nthuav dav cov pulse optical thaum nws mus los ntawm fiber ntau.Muaj feem xyuam rau qhov me me ntawm qhov yuam kev me ntsis, thiab qhov ntev ntawm qhov kis tau tus mob, thiab qhov loj ntawm qhov system ceev.

Kev nthuav dav ntawm optical pulses hauv optical fibers tshwm sim los ntawm cov pab pawg sib txawv ntawm qhov sib txawv wavelengths nyob rau hauv lub spectral Cheebtsam ntawm lub teeb qhov chaw.

11. Dab tsi yog backscattering?

A: Backscattering yog ib txoj hauv kev los ntsuas qhov attenuation raws qhov ntev ntawm cov fiber ntau optical.Feem ntau ntawm lub hwj chim kho qhov muag nyob rau hauv fiber ntau propagates rau pem hauv ntej, tab sis me ntsis ntawm nws yog backscattered rau lub luminator.Lub sij hawm nkhaus ntawm backscattering tuaj yeem pom los ntawm kev siv cov khoom siv kho qhov muag ntawm cov khoom siv luminescence.Nyob rau ntawm ib kawg, tsis tsuas yog qhov ntev thiab attenuation ntawm cov kev sib txuas niaj hnub fiber ntau tuaj yeem ntsuas, tab sis kuj tuaj yeem ntsuas qhov tsis sib xws hauv zos, breakpoint thiab optical fais fab poob los ntawm qhov sib txuas thiab cov khoom sib txuas tuaj yeem ntsuas.

12. Lub hauv paus ntsiab lus ntawm kev ntsuas lub sij hawm kho qhov muag lub sij hawm domain reflectometer (OTDR) yog dab tsi?Nws muaj nuj nqi dab tsi?

Teb: OTDR raws li lub backscattering lub teeb thiab Fresnel reflection txoj cai, thaum siv lub teeb propagation nyob rau hauv optical fiber attenuation ntawm backscatter lub teeb kom tau txais cov ntaub ntawv, yuav siv tau rau ntsuas qhov muag attenuation, splicing poob, fiber optic fault point positioning thiab nkag siab txog cov xwm txheej. ntawm kev faib tawm poob raws qhov ntev ntawm cov khoom siv kho qhov muag, thiab lwm yam, yog qhov tseem ceeb ntawm fiber ntau optic cable kev tsim kho, kho thiab saib xyuas cov cuab yeej.Nws lub ntsiab tsis muaj xws li dynamic ntau yam, rhiab heev, daws teeb meem, ntsuas lub sij hawm thiab qhov muag tsis pom qhov chaw.