Vim li cascov kab ke fiber optic muaj zog heevmuaj feem yuav muaj cov teebmeem nonlinear ntau dua?
In cov kab ke fiber optic, ntau yam teeb meem yuav luag tsis tshwm sim nyob rau hauv cov xwm txheej fais fab tsawg, tab sis thaum lub zog nce ntxiv, lawv mam li pom tseeb lossis txawm tias tsis tswj hwm, xws li kev nthuav dav spectral, kev tsis ruaj khov ntawm lub zog, kev cuam tshuam ntawm lub teeb liab, thiab kev ua haujlwm ntawm lub cev txo qis. Cov xwm txheej no feem ntau yog vim lo lus tseem ceeb: cov teebmeem nonlinear. Yog li lo lus nug yog: vim li cas thaum nws nkag mus rau hauv lub xeev muaj zog siab, cov kab ke fiber optic feem ntau yuav muaj teeb meem nonlinear?
1, Cov laj thawj tseem ceeb rau cov teebmeem nonlinear
Cov khoom siv fiber optic (quartz) lawv tus kheej muaj cov yam ntxwv tsis yog linear, feem ntau yog qhia tias qhov ntsuas refractive hloov pauv nrog lub zog ntawm lub teeb (Kerr effect). Thaum lub zog qis, qhov cuam tshuam no tsis muaj zog heev thiab tsis pom tseeb; Tab sis thaum lub zog nce ntxiv, lub zog ntawm lub teeb nce ntxiv thiab qhov cuam tshuam tsis yog linear tau txhim kho ntau heev.
2, Cov yam tseem ceeb rau kev ua kom cov teebmeem nonlinear loj dua hauv qab lub zog siab
Lub teeb ci ntsa iab heev: Lub cheeb tsam hom ntawm cov fibers optical yog me heev (feem ntau yog kaum tawm ntawm μ m ²), thiab txawm tias tag nrho lub zog tsis siab, lub teeb ci twb siab heev lawm. Cov teebmeem nonlinear yog ncaj qha cuam tshuam rau lub teeb ci (tsis yog tag nrho lub zog), thiab thaum lub zog nce, lub teeb ci ntsa iab sai sai nce, thiab cov teebmeem nonlinear nce raws li.
Lub sijhawm ua haujlwm ntev: Lub teeb hauv cov fibers optical tuaj yeem nthuav dav mus rau ntau meters txog ntau mais, thiab cov teebmeem nonlinear txuas ntxiv mus thoob plaws hauv tag nrho cov txheej txheem nthuav dav, thaum kawg muaj kev cuam tshuam loj heev. Qhov muaj zog ntawm cov teebmeem nonlinear tuaj yeem nkag siab tias yog proportional rau qhov muaj zog ntawm lub teeb uas muab ntxiv rau qhov ntev ntawm kev nthuav dav.
3, Cov teebmeem Nonlinear ib txwm muaj thiab lawv cov kev tshwm sim
Kev hloov kho theem tus kheej (SPM): Kev hloov pauv ntawm lub teeb ci ua rau muaj kev hloov pauv ntawm cov ntsuas refractive, ua rau muaj kev hloov pauv theem thiab kev nthuav dav spectral, uas qhia tau tias yog kev nthuav dav pulse thiab kev nthuav dav spectral.
Stimulated Brillouin Scattering (SBS): Nws yooj yim ua rau muaj teeb meem nyob rau hauv txoj kab nqaim thiab muaj zog ntau, nrog rau qhov chaw meej meej uas tuaj yeem tsim cov teeb meem rov qab, txwv lub zog xa mus, thiab ua rau poob qis lossis tsis ruaj khov hauv cov zis ntawm lub kaw lus.
Stimulated Raman Scattering (SRS): Tshwm sim hauv cov fibers muaj zog dua lossis ntev dua, uas yog tus cwj pwm los ntawm kev hloov pauv zog mus rau qhov ntev dua thiab kev hloov pauv hauv cov qauv spectral.
4, Qhov laj thawj vim li cas qhov teeb meem tsis tshwm sim thaum tsis muaj zog
Cov teebmeem nonlinear muaj cov yam ntxwv ntawm qhov pib thiab cov yam ntxwv ntawm kev loj hlob nonlinear. Cov teebmeem no tsis muaj zog heev thiab nyuaj rau sib sau ua ke ntawm lub zog qis; Thaum lub zog tshaj qhov pib, cov teebmeem yuav nce sai sai thiab tshwm sim tam sim ntawd, uas piav qhia txog qhov xwm txheej ntawm "teeb meem tshwm sim tam sim ntawd thaum lub zog nce siab" hauv kev tsim kho vaj tse.
5. Kev tsis sib haum xeeb tseem ceeb thiab cov tswv yim daws teeb meem hauv kev tsim vaj tsev
Cov tshuab fais fab loj yuav tsum tswj cov teebmeem tsis sib xws thaum ua kom lub zog loj zuj zus. Cov txheej txheem engineering feem ntau suav nrog:
Ua kom thaj chaw hom teb nce ntxiv kom txo qhov ci ntsa iab
Ua kom lub sijhawm ua haujlwm luv dua
Ua kom txoj kab dav dua kom txo tau SBS
Txhim kho qhov system architecture
Lub tswv yim tseem ceeb yog kom txo qhov muaj zog ntawm lub teeb ib chav ntim lossis txo cov teebmeem sib sau ua ke uas tsis yog kab.
Xaus lus
Muaj zog heevfiber opticCov kab ke feem ntau yuav muaj cov teebmeem nonlinear, thiab qhov laj thawj tseem ceeb yog tias lub teeb ci siab thiab qhov deb ua haujlwm ntev hauv cov fiber ua rau cov yam ntxwv nonlinear ntawm cov khoom siv loj hlob. Cov teebmeem nonlinear sib sau ua ke nrog lub zog thiab ntev, thiab sai sai tshwm sim tom qab dhau qhov txwv. Yog li ntawd, kev tswj lub teeb ci thiab qhov ntev zoo hauv kev tsim qauv yog qhov tseem ceeb rau kev tswj hwm nonlinearity.
Lub sijhawm tshaj tawm: Lub Rau Hli-02-2026