980nm twj tso kua mis laser daim ntawv thov
Kev yug thiab kev loj hlob ntawm kev sib txuas lus fiber ntau yog ib qho kev hloov tseem ceeb hauv keeb kwm ntawm kev sib txuas lus. Xyoo tsis ntev los no, nrog rau kev nce qib thev naus laus zis, kev hloov kho ntawm kev sib tham hauv kev sib tham hauv xov tooj thiab maj mam qhib kev sib tham hauv kev lag luam hauv kev sib tham, kev tsim kho ntawm kev sib txuas lus fiber ntau dua ib zaug pom qhov xwm txheej tshiab ntawm kev nthuav dav. Nyob rau tib lub sij hawm vim rau hauv Internet. Kev sib tham ntawm cov xov tooj sib txuas lus thiab lwm cov ntaub ntawv thiab kev loj hlob sai ntawm cov xov tooj sib txuas lus hauv xov tooj tuaj kom nrov, cov teeb liab xa xov thiab kev sib kis tau dav dav tau nce siab dua thiab siab dua, tshwj xeeb tshaj yog rau kev sib nrug fiber ntau rov qab sib txuas network thiab metro optical network kev sib txuas lus muaj peev xwm xav tau nce ntau, cov kev txhim kho ntawm txoj kab ke broadband yog qhov tseem ceeb. (WDM), tshwj xeeb tshaj yog ntom nti sib cais sib faib sib faib ntau yam (DWDM) tam sim no tau lees paub" cov tshuaj zoo tshaj plaws rau kev loj hlob sai ntawm kev sib txuas lus network bandwidth" ;. Lub neej yav tom ntej, txawm tias nws yog thaj chaw dav dav network, nroog thaj chaw network lossis Network, DWDM rau lub chaw xa xov, DWDM-based optical thauj network yuav ua rau lub cev txheej txheem yooj yim ntawm txhua qhov kev sib txuas lus network.
Tam sim no, txoj kev loj hlob ntawm kev sib txuas lus kho qhov muag network tau nce mus rau tus neeg siv sab, tsis tsuas yog lub caj qaum txuas nrov hauv kev sib txuas lus kho qhov muag, nroog thaj chaw network tseem muaj ntau dua thiab siv cov kev sib txuas lus kho qhov muag, thiab nkag mus rau hauv network kuj tau pib siv kev sib txuas lus kho qhov muag, fiber ntau rau lub tsev FTTH) tsuas yog ib qho teeb meem ntawm lub sijhawm. Rau lub teeb liab kis tau tus mob, lub teeb liab relay amplification yog qhov tseem ceeb, lub feem ntau lug siv EDFA, nws yog DWDM system thiab lub neej yav tom ntej high-ceev system, tag nrho cov-kho qhov muag network indispensable ib tug ntawm cov tseem ceeb pab kiag li lawm.
EDFA twj tso kua mis feem ntau siv 980nm thiab 1480nm siab-zog LD. EDFA cov haujlwm hauv qab no rau EDFA ua cov lus qhia luv luv. Thaum lub teeb liab teeb yog ua ke nrog tus twj tso kua mis lub teeb nyob rau hauv lub tsim nyog lub hwj chim, lub erbium-doped fiber yog dhau los ntawm lub isolator, thiab lub teeb liab teeb yog amplified los ntawm cov erbium-doped fiber nyob rau hauv qhov kev txiav txim ntawm lub twj tso kua mis lub teeb. Lub erbium-doped fiber ntau yog fiber ntau kho qhov muag nrog qee qhov kev txiav txim siab ntawm Er 3+. Txhawm rau kom meej meej nws qhov ua kom nrov ntsiab cai i, nws yog ib qhov tsim nyog yuav tsum pib los ntawm lub zog theem daim duab ntawm erbium ions. Cov hluav taws xob sab nraud ntawm erbium ions muaj peb tus qauv theem (E1, E2 thiab E3 hauv daim duab 1-1), qhov twg E1 yog theem av, E2 yog theem hluav taws xob, E3 yog theem siab zog, daim duab qhia qib EDFA.
Thaum lub high-zog twj tso kua mis laser yog siv ua kom muaj siab lub erbium-doped fiber, lub bound electrons ntawm erbium ions yuav zoo siab heev los ntawm qhov av xeev zog mus rau lub siab muaj zog E3. Txawm li cas los xij, lub zog qib siab tsis ruaj khov, yog li cov erbium ions sai sai no yuav tsis muaj hluav taws xob (piv txwv li tsis tso tawm photons) mus rau qhov ntsuas hluav taws xob theem E2. Thiab qib E2 yog cov pab pawg sib txawv ntawm qhov uas lub neej ntawm qhov hais tau ntev thiab cov lus tau txais los ntawm lub twj tso kua mis laser txuas ntxiv sau rau hauv daim ntawv ntawm txoj kev hloov mus los tsis ua haujlwm, kom ua tiav cov lej ntawm qhov kev faib tawm. Thaum lub teeb liab hluav taws xob muaj lub suab yoj ntawm 1550 nm dhau los ntawm cov kab hluav taws xob no erbium-doped fiber, cov kab mob sib kis tau hloov mus rau hauv lub xeev av hauv daim ntawv ntawm cov hluav taws xob tiv thaiv thiab tsim photons ntawm tib lub photon raws li qhov teeb meem, yog li ua rau lub teeb liab heev Tus naj npawb ntawm photons, uas yog, kom ua tiav lub teeb liab lub teeb nyob rau hauv erbium-doped fiber kis cov txheej txheem tau ua kom muaj nuj nqi. Raws li pom hauv daim duab 1-2, erbium-doped fiber ntau lub zog ua haujlwm schematic.
EDFA raws li lub tshuab tso dej sib txawv, tuaj yeem muab faib rau 980nm thiab 1480nm ob. 1480nm twj tso kua mis nce siab yog qhov siab, qhov siab tsim hluav taws xob ntau tiav; 980nm twj tso kua mis nce coefficient ntawm lub siab tshaj plaws, suab qis tshaj. Nyob rau hauv cov kab tiag tiag amplifier daim ntaub ntawv, ib lub tshuab tso kua mis amplifiers feem ntau yog 980nm twj tso tawm; multi-theem amplifier feem ntau siv ntau tshaj ob lub twj, thawj theem nrog 980nm twj tso kua mis, theem ob theem saum 1480nm lossis 980nm twj tso kua mis.
Tsis tsuas yog nyob rau hauv lub sib txuas lus kev lag luam 980nm muaj hwj huam twj tso kua mis laser muaj ib tug ntau ntawm cov ntaub ntawv sau npe nyob rau hauv laser kev kho mob thiab lwm yam ntawm ib tug loj daim ntawv thov, kev kho mob cov pov thawj, cov uas lwm tus cov ntaub so ntswg kev puas tsuaj yog me me, thiab tseem muaj ib tug zoo zoo ntawm coagulation hemostasis. Yog li high-power 980nm semiconductor lasers siv rau kev kho mob laser tawv taub hau.
Hauv kev sib txuas lus, kho qhov muag hluav taws xob yog qhov xa hluav taws xob tseem ceeb, 980nm twj tso kua mis laser yuav tsum tau txuas nrog lub fiber ntau los siv, yuav ua li cas rau laser lub teeb tawm los ntawm cov nti ntau li ntau tau kom muaj kev sib txuas nrog cov fiber ntau kom dhau los ua kub kub chaw, tab sis kuj laser pob Ib qho ntawm cov txheej txheem tseem ceeb.