Raws li paub zoo, cov dej seepage yog qhov ua rau tuag taus rau cov fibers optical, vim hydrogen precipitated los ntawm dej tuaj yeem ua rau "hydrogen poob" hauv fibers, ua rau muaj kev txo qis thiab cuam tshuam rau kev sib kis tau zoo thiab ruaj khov.
Yog li "hydrogen poob" yog dab tsi?
Hydrogen poob tuaj yeem muab faib ua ob hom: thim rov qab hydrogen poob thiab irreversible hydrogen poob.
Reversible hydrogen poob:
Hydrogen molecules diffuse rau SiO2optical fibers, thiab infiltrated dawb hydrogen yog ntes los ntawm SiO2daim phiaj ntawm chav tsev kub. Nyob rau hauv qhov kev txiav txim ntawm lub chaw hluav taws xob hauv zos, lub sij hawm dipole yog tsim nyob rau hauv cov hydrogen molecules, thiab ntxiv absorbtion poob yog generated los ntawm kev co ntawm hydrogen. Piv nrog rau kev sib txuas ntawm cov khoom sib txuas ntawm cov molecules zoo tib yam, kev ntes quab yuam ntawm daim phiaj yog qhov tsis muaj zog. Yog tias qhov chaw hydrogen ntawm fiber ntau raug tshem tawm, hydrogen molecules yuav khiav tawm ntawm SiO2daim phiaj, thiab qhov poob fiber ntau yuav rov qab los rau nws tus nqi qub. Yog li ntawd, qhov no yog ib qho kev cuam tshuam tsis sib xws, thiab qhov kev poob hydrogen generated yog thim rov qab.
Irreversible hydrogen poob:
Hydrogen molecules uas diffuse rau hauv tib neeg lub cev ntawm qhov kub thiab txias chemically bonds nrog rau qhov tsis xws luag ntawm fiber mesh los ua OH pab pawg, thiab lawv cov kev co ua rau lub ncov absorbtion poob. Vim yog lub zog sib txuas, txawm tias tom qab tshem tawm ib puag ncig hydrogen los ntawm cov khoom siv kho qhov muag, cov tshuaj tiv thaiv tseem muaj nyob thiab qhov nqus nqus yuav tsis hloov. Yog li ntawd, nws yog ib qho tshuaj lom neeg mus tas li, thiab qhov ua rau hydrogen poob yog irreversible.
Yog li yuav ua li cas kho qhov muag fiber ntau tuaj rau hauv kev sib cuag nrog hydrogen molecules? Lawv tuaj qhov twg thiab lawv yuav tsum raug tsuj li cas?
Ua ntej, nws yog ib qho tsim nyog yuav tsum nkag siab txog yam uas cuam tshuam rau qhov loj ntawm hydrogen poob. Nws yuav tsum raug sau tseg tias txawm tias nws yog ib hom kho qhov muag cable lossis ntau hom kev kho qhov muag cable, qhov sib xyaw ntawm hydrogen roj hauv cov qauv cable yuav ua rau qhov kev ua haujlwm kho qhov muag tsis zoo thaum lub sijhawm ua haujlwm.
Qhov loj ntawm hydrogen poob yog nyob ntawm cov hauv qab no:
- Hom fiber ntau optical, nws cov doping muaj pes tsawg leeg thiab concentration, thiab nws qhov kev nkag siab zoo rau hydrogen gas;
- Fiber optic cable tsim, tshwj xeeb tshaj yog kev xaiv thiab kev sib xyaw ntawm cov khoom siv hauv nws cov qauv;
- Kev teeb tsa ib puag ncig, suav nrog nws qhov kev ua haujlwm kub;
- Qib ntawm hydrogen gas tsim los ntawm optical cables thaum lawv lub neej kev pab.
Hydrogen gas hauv optical cables tuaj yeem los ntawm:
- Hydrogen tso tawm los ntawm optical cable Cheebtsam, nrog rau cov uas muaj feem xyuam rau lub sij hawm ntev kev laus los ntawm cov ntaub ntawv;
- Cov hydrogen muaj nyob rau hauv compressed cua pumped rau hauv optical cable;
- Hydrogen evolution tshwm sim los ntawm corrosion ntawm hlau Cheebtsam nyob rau hauv lub xub ntiag ntawm noo noo;
- Hydrogen tsim los ntawm biochemical corrosion.
Txhawm rau tiv thaiv kev poob hydrogen, kev ntsuas tsim nyog yuav tsum tau txiav txim siab hauv kev tsim thiab tsim cov fiber ntau optic cables, xws li:
- Xaiv cov dopants tsim nyog thaum ua fiber ntau optic preforms, thiab siv P2O5tsawg los yog tsawg;
- Thaum ua fiber ntau optic preforms, hluavtaws SiO2yog siv los ua cladding es tsis txhob ntawm ntuj SiO2cladding;
- Thaum kos cov fibers optical, xaiv cov ntaub ntawv txheej uas tsis tshua muaj hydrogen evolution;
- Ua tib zoo xaiv cov ntaub ntawv siv rau cov khoom siv kho qhov muag, tshwj xeeb tshaj yog cov filling paste uas tuaj rau hauv kev sib cuag nrog cov fiber ntau, uas yog qhov tseem ceeb tshwj xeeb;
- Siv cov dej thaiv kev ntsuas rau cov fiber ntau optic cables kom paub tseeb tias tsis muaj tag nrho cov dej seepage los yog hydrogen evolution, thiab tshem tawm cov hydrogen ib puag ncig sab nraud.